Newsgroup: it.comp.os.linux.debian
Titolo: Stretch, nouveau e geforce fx 5600 go

Salve a tutti,
ho installato Stretch con DM LXDE, su un vecchio portatile Acer Aspire 
1700, con successo. L'unico problema che al momento mi trovo ad 
affrontare è quello della gestione della scheda video. Con i driver 
noueveau attualmente la profondità di colore che ottengo è, credo adesso 
non vorrei dire eresie, di 8 bit, quindi con una gestione del desktop al 
limite dell'usabilità come potete immaginare. Inoltre anche la frequenza 
di refresh credo non sia gestita al meglio infatti ho un notevole 
sfarfallio.
Ho visto che i driver proprietari nvidia 173.xxx che gestiscono questa 
scheda, non sono sui repo di stretch. Premetto che a me non interessano 
prestazioni elevate, quindi dei driver proprietari posso farne anche a 
meno se riuscissi ad ottimizzare i nouveau.
Qualcuno a suggerimenti da darmi?
Grazie in anticipo a tutti per le eventuali risposte.
 


  Che cosa dice xdpyinfo?
 
 
  Ciao,
 
 
-- 
Alessandro Selli 
http://alessandro.route-add.net
 
AVVERTENZA: i messaggi inviati a "trappola" non mi arriveranno.
WARNING: messages sent to "trappola" will never reach me.


Ecco l'output di xdpyinfo:
name of display:    :0.0
version number:    11.0
vendor string:    The X.Org Foundation
vendor release number:    11804000
X.Org version: 1.18.4
maximum request size:  16777212 bytes
motion buffer size:  256
bitmap unit, bit order, padding:    32, LSBFirst, 32
image byte order:    LSBFirst
number of supported pixmap formats:    7
supported pixmap formats:
     depth 1, bits_per_pixel 1, scanline_pad 32
     depth 4, bits_per_pixel 8, scanline_pad 32
     depth 8, bits_per_pixel 8, scanline_pad 32
     depth 15, bits_per_pixel 16, scanline_pad 32
     depth 16, bits_per_pixel 16, scanline_pad 32
     depth 24, bits_per_pixel 32, scanline_pad 32
     depth 32, bits_per_pixel 32, scanline_pad 32
keycode range:    minimum 8, maximum 255
focus:  window 0x2200005, revert to Parent
number of extensions:    29
     BIG-REQUESTS
     Composite
     DAMAGE
     DOUBLE-BUFFER
     DPMS
     DRI2
     GLX
     Generic Event Extension
     MIT-SCREEN-SAVER
     MIT-SHM
     Present
     RANDR
     RECORD
     RENDER
     SECURITY
     SGI-GLX
     SHAPE
     SYNC
     X-Resource
     XC-MISC
     XFIXES
     XFree86-DGA
     XFree86-VidModeExtension
     XINERAMA
     XInputExtension
     XKEYBOARD
     XTEST
     XVideo
     XVideo-MotionCompensation
default screen number:    0
number of screens:    1
 
screen #0:
   dimensions:    1280x1024 pixels (338x270 millimeters)
   resolution:    96x96 dots per inch
   depths (7):    24, 1, 4, 8, 15, 16, 32
   root window id:    0x190
   depth of root window:    24 planes
   number of colormaps:    minimum 1, maximum 1
   default colormap:    0x20
   default number of colormap cells:    256
   preallocated pixels:    black 0, white 16777215
   options:    backing-store WHEN MAPPED, save-unders NO
   largest cursor:    64x64
   current input event mask:    0x7a003f
     KeyPressMask             KeyReleaseMask           ButtonPressMask 
 
     ButtonReleaseMask        EnterWindowMask          LeaveWindowMask 
 
     StructureNotifyMask      SubstructureNotifyMask 
SubstructureRedirectMask
     FocusChangeMask          PropertyChangeMask
   number of visuals:    96
   default visual id:  0x21
   visual:
     visual id:    0x21
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x22
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x132
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x133
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x134
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x135
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x136
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x137
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x138
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x139
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x13a
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x13b
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x13c
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x13d
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x13e
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x13f
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x140
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x141
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x142
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x143
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x144
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x145
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x146
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x147
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x148
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x149
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x14a
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x14b
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x14c
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x14d
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x14e
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x14f
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x150
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x151
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x152
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x153
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x154
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x155
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x156
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x157
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x158
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x159
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x15a
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x15b
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x15c
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x15d
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x15e
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x15f
     class:    TrueColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x160
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x161
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x162
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x163
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x164
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x165
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x166
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x167
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x168
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x169
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x16a
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x16b
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x16c
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x16d
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x16e
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x16f
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x170
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x171
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x172
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x173
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x174
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x175
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x176
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x177
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x178
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x179
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x17a
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x17b
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x17c
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x17d
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x17e
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x17f
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x180
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x181
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x182
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x183
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x184
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x185
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x186
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x187
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x188
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x189
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x18a
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x18b
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x18c
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x18d
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0x18e
     class:    DirectColor
     depth:    24 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits
   visual:
     visual id:    0xa1
     class:    TrueColor
     depth:    32 planes
     available colormap entries:    256 per subfield
     red, green, blue masks:    0xff0000, 0xff00, 0xff
     significant bits in color specification:    8 bits

Ho controllato anche i messaggi del Kernel relativi a nouveau ecco il 
risultato di dmesg | grep nouveau:
 
    10.411835] nouveau 0000:01:00.0: NVIDIA NV31 (031a00a1)
[   10.557078] nouveau 0000:01:00.0: bios: version 04.31.20.53.00
[   10.980908] nouveau 0000:01:00.0: putting AGP V2 device into 4x mode
[   10.980950] nouveau 0000:01:00.0: tmr: unknown input clock freq
[   10.980960] nouveau 0000:01:00.0: fb: 64 MiB DDR1
[   11.333149] nouveau 0000:01:00.0: DRM: VRAM: 63 MiB
[   11.333153] nouveau 0000:01:00.0: DRM: GART: 64 MiB
[   11.333161] nouveau 0000:01:00.0: DRM: BMP version 5.39
[   11.333166] nouveau 0000:01:00.0: DRM: DCB version 2.2
[   11.333171] nouveau 0000:01:00.0: DRM: DCB outp 00: 01000300 00009c40
[   11.333177] nouveau 0000:01:00.0: DRM: DCB outp 01: 030103f3 00000005
[   11.333180] nouveau 0000:01:00.0: DRM: DCB outp 02: 02020321 00000003
[   11.333315] nouveau 0000:01:00.0: DRM: Loading NV17 power sequencing 
microcode
[   11.333326] nouveau 0000:01:00.0: DRM: BIOS FP mode: 1280x1024 
(108000kHz pixel clock)
[   11.334142] nouveau 0000:01:00.0: DRM: Saving VGA fonts
[   11.733806] nouveau 0000:01:00.0: DRM: MM: using M2MF for buffer copies
[   11.733838] nouveau 0000:01:00.0: DRM: Calling LVDS script 1:
[   11.733844] nouveau 0000:01:00.0: DRM: Calling LVDS script 6:
[   11.733849] nouveau 0000:01:00.0: DRM: 0xE033: Parsing digital output 
script table
[   12.229967] nouveau 0000:01:00.0: DRM: Setting dpms mode 3 on TV 
encoder (output 2)
[   12.301020] nouveau 0000:01:00.0: DRM: allocated 1280x1024 fb: 
0x9000, bo f4b29c00
[   12.301415] fbcon: nouveaufb (fb0) is primary device
[   12.324614] nouveau 0000:01:00.0: DRM: Calling LVDS script 2:
[   12.324618] nouveau 0000:01:00.0: DRM: 0xE16E: Parsing digital output 
script table
[   12.471513] nouveau 0000:01:00.0: DRM: Calling LVDS script 5:
[   12.471516] nouveau 0000:01:00.0: DRM: 0xE01C: Parsing digital output 
script table
[   12.536851] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
[   12.539958] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 
on minor 0
[   26.814296] nouveau 0000:01:00.0: DRM: Calling LVDS script 6:
[   26.814308] nouveau 0000:01:00.0: DRM: 0xE033: Parsing digital output 
script table
[   27.397510] nouveau 0000:01:00.0: DRM: Calling LVDS script 2:
[   27.397521] nouveau 0000:01:00.0: DRM: 0xE16E: Parsing digital output 
script table
[   27.544415] nouveau 0000:01:00.0: DRM: Calling LVDS script 5:
[   27.544420] nouveau 0000:01:00.0: DRM: 0xE01C: Parsing digital output 
script table
[ 2178.852812] nouveau 0000:01:00.0: DRM: Calling LVDS script 6:
[ 2178.852823] nouveau 0000:01:00.0: DRM: 0xE033: Parsing digital output 
script table
[ 2179.377544] nouveau 0000:01:00.0: DRM: Calling LVDS script 2:
[ 2179.377555] nouveau 0000:01:00.0: DRM: 0xE16E: Parsing digital output 
script table
[ 2179.524452] nouveau 0000:01:00.0: DRM: Calling LVDS script 5:
[ 2179.524457] nouveau 0000:01:00.0: DRM: 0xE01C: Parsing digital output 
script table
 
La cosa strana è che sembra tutto a posto, anche nel log di Xorg non 
risultano apparenti anomalie. Se serve posto anche quello.
Grazie ancora

 risultato di dmesg | grep nouveau:
 
[...]
 
  Direi che la colpa non sia del driver nouveau.



Sapresti darmi qualche indicazione su cosa indagare per scoprire dove 
sta il probelma?
Grazie


  In breve nel fatto che stai usando una distribuzione di sviluppo, una
beta, una versione di testing.



Ciao Alessandro,
intanto ancora grazie per le risposte.
Ho fatto altri tentativi che vado ad elencarti.
  1.Ho provato a far partire il pc con una live di LXLE in modalità 
normale. Con questa modalità che carica i driver nouveau ottengo lo 
stesso difetto, mentre se l'avvio in modalità VESA (xforcevesa) la 
visualizzazione è corretta, non posso andare oltre la risoluzione di 
1024x768 ma funziona. Sembrerebbe quindi che in effetti nouveau non sia 
perfettamente compatibile con la scheda video/monitor
 
2.Ho provato quindi a far partire il pc con stretch in modalita Vesa 
passando a grub la modalità nomodeset, il monitor si avvia perfettamente 
senza sfarfallamenti ne puntinature, ma mi resta poi solo lo schermo 
nero con il cursore. Ho creato quindi un file di configurazione per xorg 
in /etc/X11/xorg.conf.d con le sezioni monitor, device e screen ma il 
risultato rimane lo stesso.
 
Proverò ad installare LXLE sull'HDD in modalità vesa e vediamo cosa 
succede. O mi consigli di provare ad installare Jessie?
 
Grazie ancora

 beta, una versione di testing.
 
 
Ho installato Jessie adesso, il problema rimane identico.
 
Almeno con Jessie riesco ad avviare X con il modulo VESA e la trovo 
abbastanza usabile.
Sembra proprio un problema legato ai drivers nouveau.
Potrei provare ad installare i driver nvidia ma purtroppo si trovano 
solo nei repo di wheezy. Qualcuno ha qualche idea su come poterli 
installare su jessie o stretch?
 
Grazie
 
 
 
 

 Sembra proprio un problema legato ai drivers nouveau.
 
  No, sicuramente no.  Sono le librerie o proprio Xorg che non ne fanno
un buon uso.  Ad esempio, nouveau configura correttamente la profondità
di colore e sa utilizzare tutte le profondità da 8 a 32 bit/pixel::
 
supported pixmap formats:
    depth 1, bits_per_pixel 1, scanline_pad 32
    depth 4, bits_per_pixel 8, scanline_pad 32
    depth 8, bits_per_pixel 8, scanline_pad 32
    depth 15, bits_per_pixel 16, scanline_pad 32
    depth 16, bits_per_pixel 16, scanline_pad 32
    depth 24, bits_per_pixel 32, scanline_pad 32
    depth 32, bits_per_pixel 32, scanline_pad 32
 
[...]
 
screen #0:
  dimensions:    1280x1024 pixels (338x270 millimeters)
  resolution:    96x96 dots per inch
  depths (7):    24, 1, 4, 8, 15, 16, 32
 
  L'ultima riga vuol dire che di tutte le profondità di colore
utilizzabili, quella a 24 bit è quella adesso in uso.  E quindi non è
possibile che Xorg stia utilizzando una profondità colore ad 8 bit, se a
te sembra che sia così il problema è di quello che gira a livello
utente, dalle librerie mesa in poi (Xorg, window manager).  xdriinfo
dovrebbe confermarti che è disponibile l'accelerazione hardware 3D per
il chip grafico in uso.  xrandr --query dovrebbe quindi elencarti tutti
i dispositivi di output video disponibili e le loro possibili
configurazioni.  I log di Xorg e i risultati di xdpyinfo confermano che
il driver nouveau sta lavorando bene.  Anche grep -i DRI[^A-Z]
/var/log/Xorg.0.log dovrebbe confermare che il Direct Rendering
Infrastructure stia lavorando per bene, e che quindi il driver nouveau
non ha problemi con il chip che hai.
 
  Continuo quindi a sospettare di Xorg o della sua configurazione
(esiste /etc/X11/xorg.conf?).


 (esiste /etc/X11/xorg.conf?).
 
Ciao Alessandro,
grazie ancora per la pazienza.
No, non esiste xorg.conf, viene configurato tutto automaticamente. Pensi 
sia opportuno creare un xorg.conf e bypassare la configurazione 
automatica di X?
 
Ciao


  Non lo so.  Mettere le mani in xorg.conf è sempre stressante.  Il tuo
caso è difficile da diagnosticare, visto che tutto (nouveau, xdpyinfo,
/var/log/Xorg.0.log e, assumo, pure xdriinfo e xrandr, anche se non ne
hai scritto nulla) non segnalano nulla di anomalo eppure la grafica non
funziona.  Senza sapere che cos'è che non funziona è arduo dare
istruzioni per mettere le cose a posto.  Per verificare il corretto
funzionamento dell'accelerazione 3D ci sono anche i comandi glxinfo e
es2_info, ma dubito che il problema sia solo di supporto per le funzioni
3D.  Non so se qualcuna delle opzioni che suporta nouveau possono
aiutare (vedere modinfo nouveau e, se c'è, man nouveau), ma
difficilmente ti potrei aiutare, potendo solo andare ad indovinare e
tentare per esclusione.



Aggiornamento.
Ho fatto un tentativo collegando un monitor VGA al notebook.
Ho attivato la modalità clonazione e sorpresa sul monitor VGA la 
visualizzazione è corretta mentre sul lcd del portatile c'è sempre lo 
stesso difetto.
Premesso che il monitor funziona correttamente in modalità vesa e che 
quando c'era Windows XP funzionava correttamente, da cosa può dipendere 
questo comportamento?
Potrebbe essere un problema di dithering?
Te lo chiedo perchè lanciando xrandr --prop ottengo:
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096
VGA-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 
376mm x 301mm
	EDID:
		00ffffffffffff0004722400a9ae2000
		0214010368261e6b2a6760a25a499e23
		135054bfef00818f8180714f7140614f
		6140454f8100302a009851002a403070
		1300782d1100001e000000ff004c425a
		3038313631343233330a000000fd0037
		4b1e530e000a202020202020000000fc
		004163657220563139330a20202000d3
    1280x1024     60.02*+  75.02
    1280x800      59.81
    1152x864      75.00    59.97
    1024x768      75.08    75.03    70.07    60.00
    832x624       74.55
    800x600       72.19    75.00    60.32    56.25
    640x480       75.00    72.81    66.67    60.00
    720x400       70.08
LVDS-1 connected 1280x1024+0+0 (normal left inverted right x axis y 
axis) 0mm x 0mm
	dithering mode: auto
		supported: auto, off, on
	scaling mode: Full
		supported: None, Full, Center, Full aspect
    1280x1024     60.02*+  59.89
    1280x960      59.94
    1152x864      59.96
    1024x768      59.92
    800x600       59.86
    640x480       59.38
    720x400       59.55
    640x400       59.95
    640x350       59.77
TV-1 disconnected (normal left inverted right x axis y axis)
	overscan: 50
		range: (0, 100)
	hue: 0
		range: (0, 100)
	saturation: 50
		range: (0, 100)
	flicker reduction: 50
		range: (0, 100)
	mode: PAL
		supported: PAL, PAL-M, PAL-N, PAL-Nc, NTSC-M, NTSC-J
	subconnector: Unknown
		supported: Unknown, Composite, SVIDEO, Component, SCART
	select subconnector: Automatic
		supported: Automatic, Composite, SVIDEO, Component, SCART
 
 
 
Come vedi sulla LVDS c'è un dithering mode: auto
che sulla VGA non esiste. Ho provato anche a disattivarlo con:
 
xrandr --output LVDS-1 --set dithering off
 
ma ottengo il seguente messaggio di errore:
X Error of failed request: BadName (named color or font does not exist)
	Major opcode of failed request: 140(RANDR)
	Minor opcode of failed request: 11 (RRQueryOutputProperty)
	Serial number of failed request: 31
	Currrent serial number in output stream: 31
 
Cosa ne pensi?