From: kevin@iti.gov.sg (Kevin Patt (SE))
Subject: Changing Default Visual
Organization: National Computer Board, Singapore
Date: Fri, 6 Nov 1992 09:33:00 GMT

Hi,

    I have gotten myself a HP720 with a CRX24Z card.  

    This is my problem.  I need my X Windows visual to have 256 color cells,
    but the default visual keeps returning a visual with 255 color cells.
    The display information is as follows:

** xdpyinfo **
name of display:    endor:0.0
version number:    11.0
vendor string:    Hewlett-Packard Company
vendor release number:    5
maximum request size:  16384 longwords (65536 bytes)
motion buffer size:  100
bitmap unit, bit order, padding:    32, MSBFirst, 32
image byte order:    MSBFirst
number of supported pixmap formats:    9
supported pixmap formats:
    depth 1, bits_per_pixel 1, scanline_pad 32
    depth 2, bits_per_pixel 8, scanline_pad 32
    depth 3, bits_per_pixel 8, scanline_pad 32
    depth 4, bits_per_pixel 8, scanline_pad 32
    depth 6, bits_per_pixel 8, scanline_pad 32
    depth 8, bits_per_pixel 8, scanline_pad 32
    depth 12, 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 10, maximum 135
number of extensions:    10
    HPExtension
    ShareExtension
    XTestExtension1
    SHAPE
    MIT-SHM
    Multi-Buffering
    XInputExtension
    MIT-SUNDRY-NONSTANDARD
    stellar-shmLink
    shmLink
default screen number:    0
number of screens:    1

screen #0:
  dimensions:    1280x1024 pixels (357x285 millimeters)
  resolution:    91x91 dots per inch
  depths (4):    1, 8, 12, 24
  root window id:    0x26
  depth of root window:    8 planes
  number of colormaps:    minimum 1, maximum 5
  default colormap:    0x24
  default number of colormap cells:    255
  preallocated pixels:    black 0, white 1
  options:    backing-store YES, save-unders YES
  current input event mask:    0x30003c
    ButtonPressMask          ButtonReleaseMask        EnterWindowMask
    LeaveWindowMask          SubstructureRedirectMask FocusChangeMask
  number of visuals:    4
  default visual id:  0x21
  visual:
    visual id:    0x20
    class:    PseudoColor
    depth:    8 planes
    size of colormap:    256 entries
    red, green, blue masks:    0x0, 0x0, 0x0
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x21
    class:    PseudoColor
    depth:    8 planes
    size of colormap:    255 entries
    red, green, blue masks:    0x0, 0x0, 0x0
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x22
    class:    DirectColor
    depth:    12 planes
    size of colormap:    256 entries
    red, green, blue masks:    0xf00, 0xf0, 0xf
    significant bits in color specification:    4 bits
  visual:
    visual id:    0x23
    class:    DirectColor
    depth:    24 planes
    size of colormap:    256 entries
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  number of mono multibuffer types:    4
    visual id, max buffers, depth:    0x20, 0, 8
    visual id, max buffers, depth:    0x21, 0, 8
    visual id, max buffers, depth:    0x22, 0, 12
    visual id, max buffers, depth:    0x23, 0, 24
  number of stereo multibuffer types:    0
 
** end of xdpyinfo display **

  So what do I need to do to change the default visual from 0x21 to 0x20?
  I appreciate any help given.  Thanks in advance!

- Kevin
-- 
Kevin Patt                                     Information Technology Institute
Associate Member of Technical Staff            Singapore 
Email: (Internet) kevin@iti.gov.sg             Tel: (065) 772-0471 
       (BITNet)   kevinpatt@itivax.bitnet      Fax: (065) 779-5966