Newsgroup: it.comp.os.linux.sys
Titolo: Strano problema con Pentium Dual Core

Buongiorno a tutti.
Ho uno strano problema con il mio sistema Linux debian, vorrei sapere se
qualcuno ha già visto un problema simile o se ha un idea per risolverlo.
Il sistema è basato da una motherboard asus P5PE-VM con processore Intel
Pentium D Dual Core.
Ho in esecuzione il kernel Linux 2.6.18-3-686 di debian "etch".
Linux vede perfettamente il doppio processore, come mostra il /proc/cpuinfo
allegato in calce. 
A volte il sistema parte e tutto funziona alla perfezione.
Altre volte, sembra tutto ok ma in realtà qualcosa, credo a livello di
timers o del processo idle, non funziona correttamente e lo si vede ad
esempio puntando il mouse su una delle icone della barra di KDE;
normalmente dopo qualche istante appare con una sfumata la descrizione
dell'icona puntata, ad esempio "Konqueror, browser web". 
Quando il sistema funziona correttamente, la sfumata (o fade-in) con cui
appare la descrizione è molto veloce e regolare. Quando non funziona bene,
è molto lenta ed impiega almeno due secondi in più per essere visualizzata.
Altra cosa, scegliendo "Termina la sessione" normalmente il desktop viene
presentato in bianco e nero, con una tendina che parte dall'alto verso il
basso. Quando il sistema non sta funzionando correttamente, l'effetto
tendina del desktop che diventa in bianco e nero è molto lento, ma la cosa
strana è che muovendo il mouse (quindi generando interrupt) la velocità
aumenta, diventando praticamente regolare.
Mi sono accorto di questi problemi utilizzando un utility che dialoga con un
sistema embedded tramite la porta seriale. Quando il sistema presenta
problemi, i caratteri trasmessi presentano uno strano ritardo dal momento
della chiamata alla reale uscita sulla porta seriale, ed i caratteri
ricevuti "svegliano" la funzione select con lo stesso ritardo.
La velocità di esecuzione dei vari applicativi sembra la stessa, il problema
credo stia nell'idle, ovvero quando il sistema non è occupato, impiega
diverso tempo a tornare ad un processo che chiede la CPU.
Attualmente l'unica soluzione che ho trovato è quella di riavviare il PC
sperando che si avvii nel modo corretto. La cosa è abbastanza casuale,
direi che il 50% delle volte funziona correttamente.
Ho provato a guardare le differenze nei messaggi di boot del kernel tra le
due modalità di funzionamento, ma non ho riscontrato differenze
apprezzabili. Lo stesso per l'elenco dei moduli presenti o per i processi
in esecuzione.
Bah.....
Grazie per l'attenzione.
Gabriele.
/proc/cpuinfo:
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 6
model name      : Intel(R) Pentium(R) D CPU 3.00GHz
stepping        : 4
cpu MHz         : 2400.000
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 6
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
constant_tsc pni monitor ds_cpl est cid cx16 xtpr lahf_lm
bogomips        : 5989.53
processor       : 1
vendor_id       : GenuineIntel
cpu family      : 15
model           : 6
model name      : Intel(R) Pentium(R) D CPU 3.00GHz
stepping        : 4
cpu MHz         : 2400.000
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 6
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
constant_tsc pni monitor ds_cpl est cid cx16 xtpr lahf_lm
bogomips        : 5985.55
Log di boot del kernel quando non funzionante correttamente:
Linux version 2.6.18-3-686 (Debian 2.6.18-7) (
wa...@debian.org
) (gcc version
4.1.2 20061115 (prerelease) (Debian 4.1.1-20)) #1 SMP Mon Dec 4 16:41:14
UTC 2006
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e6000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000003ffb0000 (usable)
 BIOS-e820: 000000003ffb0000 - 000000003ffc0000 (ACPI data)
 BIOS-e820: 000000003ffc0000 - 000000003fff0000 (ACPI NVS)
 BIOS-e820: 000000003fff0000 - 0000000040000000 (reserved)
 BIOS-e820: 00000000ffb80000 - 0000000100000000 (reserved)
127MB HIGHMEM available.
896MB LOWMEM available.
found SMP MP-table at 000ff780
On node 0 totalpages: 262064
  DMA zone: 4096 pages, LIFO batch:0
  Normal zone: 225280 pages, LIFO batch:31
  HighMem zone: 32688 pages, LIFO batch:7
DMI 2.3 present.
ACPI: RSDP (v000 ACPIAM                                ) @ 0x000faf80
ACPI: RSDT (v001 A M I  OEMRSDT  0x07000610 MSFT 0x00000097) @ 0x3ffb0000
ACPI: FADT (v002 A M I  OEMFACP  0x07000610 MSFT 0x00000097) @ 0x3ffb0200
ACPI: MADT (v001 A M I  OEMAPIC  0x07000610 MSFT 0x00000097) @ 0x3ffb0390
ACPI: OEMB (v001 A M I  OEMBIOS  0x07000610 MSFT 0x00000097) @ 0x3ffc0040
ACPI: DSDT (v001  A0551 A0551036 0x00000036 INTL 0x02002026) @ 0x00000000
ACPI: PM-Timer IO Port: 0x808
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
Processor #0 15:6 APIC version 20
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
Processor #1 15:6 APIC version 20
ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled)
ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled)
ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Enabling APIC mode:  Flat.  Using 1 I/O APICs
Using ACPI (MADT) for SMP configuration information
Allocating PCI resources starting at 50000000 (gap: 40000000:bfb80000)
Detected 2992.841 MHz processor.
Built 1 zonelists.  Total pages: 262064
Kernel command line: root=/dev/sda5 vga=0x31a nr_uarts=8
mapped APIC to ffffd000 (fee00000)
mapped IOAPIC to ffffc000 (fec00000)
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 16384 bytes)
Console: colour dummy device 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 1031512k/1048256k available (1543k kernel code, 16092k reserved,
574k data, 196k init, 130752k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 5989.55 BogoMIPS
(lpj=11979109)
Security Framework v1.0.0 initialized
SELinux:  Disabled at boot.
Capability LSM initialized
Mount-cache hash table entries: 512
CPU: After generic identify, caps: bfebfbff 20000000 00000000 00000000
0000e49d 00000000 00000001
CPU: After vendor identify, caps: bfebfbff 20000000 00000000 00000000
0000e49d 00000000 00000001
monitor/mwait feature present.
using mwait in idle threads.
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 2048K
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
CPU: After all inits, caps: bfebfbff 20000000 00000000 00000180 0000e49d
00000000 00000001
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (24) available
CPU0: Thermal monitoring enabled
Compat vDSO mapped to ffffe000.
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
ACPI: Core revision 20060707
CPU0: Intel(R) Pentium(R) D CPU 3.00GHz stepping 04
SMP alternatives: switching to SMP code
Booting processor 1/1 eip 3000
Initializing CPU#1
Calibrating delay using timer specific routine.. 5985.53 BogoMIPS
(lpj=11971061)
CPU: After generic identify, caps: bfebfbff 20000000 00000000 00000000
0000e49d 00000000 00000001
CPU: After vendor identify, caps: bfebfbff 20000000 00000000 00000000
0000e49d 00000000 00000001
monitor/mwait feature present.
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 2048K
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 1
CPU: After all inits, caps: bfebfbff 20000000 00000000 00000180 0000e49d
00000000 00000001
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#1.
CPU1: Intel P4/Xeon Extended MCE MSRs (24) available
CPU1: Thermal monitoring enabled
CPU1: Intel(R) Pentium(R) D CPU 3.00GHz stepping 04
Total of 2 processors activated (11975.08 BogoMIPS).
ENABLING IO-APIC IRQs
..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
checking TSC synchronization across 2 CPUs: passed.
Brought up 2 CPUs
migration_cost=1278
checking if image is initramfs... it is
Freeing initrd memory: 4394k freed
NET: Registered protocol family 16
ACPI: bus type pci registered
PCI: PCI BIOS revision 2.10 entry at 0xf0031, last bus=2
PCI: Using configuration type 1
Setting up standard PCI resources
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI: Probing PCI hardware (bus 00)
PCI quirk: region 0800-087f claimed by ICH4 ACPI/GPIO/TCO
PCI quirk: region 0480-04bf claimed by ICH4 GPIO
PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.1
Boot video device is 0000:01:00.0
PCI: Netmos 9845 (1 parallel, 4 serial); changing class SERIAL to OTHER (use
parport_serial)
PCI: Transparent bridge - 0000:00:1e.0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P4._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 *5 6 7 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 *5 6 7 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs *3 4 5 6 7 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15) *0,
disabled.
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 11 12 14 15) *0,
disabled.
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 15) *0,
disabled.
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 10 *11 12 14 15)
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
pnp: PnP ACPI: found 14 devices
PnPBIOS: Disabled by ACPI PNP
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq".  If it helps, post a
report
pnp: 00:0c: ioport range 0x290-0x297 has been reserved
PCI: Bridge: 0000:00:01.0
  IO window: b000-bfff
  MEM window: fb000000-fbefffff
  PREFETCH window: f8000000-f9ffffff
PCI: Bridge: 0000:00:1e.0
  IO window: c000-efff
  MEM window: fbf00000-fbffffff
  PREFETCH window: 50000000-500fffff
PCI: Setting latency timer of device 0000:00:1e.0 to 64
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
audit: initializing netlink socket (disabled)
audit(1166084937.928:1): initialized
highmem bounce pool size: 64 pages
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
vesafb: framebuffer at 0xf8000000, mapped to 0xf8880000, using 5120k, total
32768k
vesafb: mode is 1280x1024x16, linelength=2560, pages=5
vesafb: protected mode interface info at c000:7d60
vesafb: pmi: set display start = c00c7df2, set palette = c00c7e5e
vesafb: pmi: ports = 3de 3df 
vesafb: scrolling: redraw
vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0
Console: switching to colour frame buffer device 160x64
fb0: VESA VGA frame buffer device
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:0b: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
mice: PS/2 mouse device common for all mice
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
NET: Registered protocol family 8
NET: Registered protocol family 20
Starting balanced_irq
Using IPI No-Shortcut mode
ACPI: (supports S0 S1 S3 S4 S5)
Freeing unused kernel memory: 196k freed
Time: tsc clocksource has been installed.
input: AT Translated Set 2 keyboard as /class/input/input0
ACPI (exconfig-0455): Dynamic SSDT Load - OemId [   AMI] OemTableId [ 
CPU1PM] [20060707]
ACPI: Processor [CPU1] (supports 8 throttling states)
ACPI (exconfig-0455): Dynamic SSDT Load - OemId [   AMI] OemTableId [ 
CPU2PM] [20060707]
ACPI: Processor [CPU2] (supports 8 throttling states)
ACPI Exception (acpi_processor-0681): AE_NOT_FOUND, Processor Device is not
present [20060707]
ACPI: Getting cpuindex for acpiid 0x3
ACPI Exception (acpi_processor-0681): AE_NOT_FOUND, Processor Device is not
present [20060707]
ACPI: Getting cpuindex for acpiid 0x4
usbcore: registered new driver usbfs
usbcore: registered new driver hub
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
SCSI subsystem initialized
ICH5: IDE controller at PCI slot 0000:00:1f.1
PCI: Enabling device 0000:00:1f.1 (0005 -> 0007)
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 169
ICH5: chipset revision 2
ICH5: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0xfc08-0xfc0f, BIOS settings: hdc:DMA, hdd:DMA
Probing IDE interface ide0...
libata version 2.00 loaded.
USB Universal Host Controller Interface driver v3.0
Probing IDE interface ide1...
hdc: SAMSUNG CD-R/RW SW-240B, ATAPI CD/DVD-ROM drive
hdd: LG DVD-ROM DRD-8120B, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> IRQ 177
PCI: Setting latency timer of device 0000:00:1d.0 to 64
uhci_hcd 0000:00:1d.0: UHCI Host Controller
uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
uhci_hcd 0000:00:1d.0: irq 177, io base 0x00009800
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
hdc: ATAPI 40X CD-ROM CD-R/RW drive, 8192kB Cache, DMA
Uniform CD-ROM driver Revision: 3.20
hdd: ATAPI 40X DVD-ROM drive, 512kB Cache, UDMA(33)
ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 185
PCI: Setting latency timer of device 0000:00:1d.1 to 64
uhci_hcd 0000:00:1d.1: UHCI Host Controller
uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
uhci_hcd 0000:00:1d.1: irq 185, io base 0x0000a000
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 169
PCI: Setting latency timer of device 0000:00:1d.2 to 64
uhci_hcd 0000:00:1d.2: UHCI Host Controller
uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3
uhci_hcd 0000:00:1d.2: irq 169, io base 0x0000a400
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:1d.3[A] -> GSI 16 (level, low) -> IRQ 177
PCI: Setting latency timer of device 0000:00:1d.3 to 64
uhci_hcd 0000:00:1d.3: UHCI Host Controller
uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 4
uhci_hcd 0000:00:1d.3: irq 177, io base 0x0000a800
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
usb 1-1: new full speed USB device using uhci_hcd and address 2
ACPI: PCI Interrupt 0000:00:1d.7[D] -> GSI 23 (level, low) -> IRQ 193
PCI: Setting latency timer of device 0000:00:1d.7 to 64
ehci_hcd 0000:00:1d.7: EHCI Host Controller
ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 5
ehci_hcd 0000:00:1d.7: debug port 1
PCI: cache line size of 128 is not supported by device 0000:00:1d.7
ehci_hcd 0000:00:1d.7: irq 193, io mem 0xfafffc00
ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
usb usb5: configuration #1 chosen from 1 choice
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 8 ports detected
ACPI: PCI Interrupt 0000:02:0d.0[A] -> GSI 23 (level, low) -> IRQ 193
skge 1.6 addr 0xfbffc000 irq 193 chip Yukon-Lite rev 9
skge eth0: addr 00:17:31:7f:31:77
ata_piix 0000:00:1f.2: version 2.00
ata_piix 0000:00:1f.2: MAP [ P0 -- P1 -- ]
ACPI: PCI Interrupt 0000:00:1f.2[A] -> GSI 18 (level, low) -> IRQ 169
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: SATA max UDMA/133 cmd 0x8800 ctl 0x8402 bmdma 0x7400 irq 169
ata2: SATA max UDMA/133 cmd 0x8000 ctl 0x7802 bmdma 0x7408 irq 169
scsi0 : ata_piix
ata1.00: ATA-7, max UDMA/133, 490234752 sectors: LBA48 NCQ (depth 0/32)
ata1.00: ata1: dev 0 multi count 16
ata1.00: configured for UDMA/133
scsi1 : ata_piix
ATA: abnormal status 0x7F on port 0x8007
  Vendor: ATA       Model: Maxtor 6V250F0    Rev: VA11
  Type:   Direct-Access                      ANSI SCSI revision: 05
SCSI device sda: 490234752 512-byte hdwr sectors (251000 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: drive cache: write back
SCSI device sda: 490234752 512-byte hdwr sectors (251000 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: drive cache: write back
 sda: sda1 sda2 sda3 sda4 < sda5 >
sd 0:0:0:0: Attached scsi disk sda
Attempting manual resume
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
usb 5-1: new high speed USB device using ehci_hcd and address 2
usb 5-1: configuration #1 chosen from 1 choice
usb 5-3: new high speed USB device using ehci_hcd and address 4
Real Time Clock Driver v1.12ac
input: PC Speaker as /class/input/input1
Floppy drive(s): fd0 is 1.44M
usb 5-3: configuration #1 chosen from 1 choice
FDC 0 is a post-1991 82077
intel_rng: FWH not detected
parport: PnPBIOS parport detected.
parport0: PC-style at 0x378 (0x778), irq 7, dma 3
[PCSPP,TRISTATE,COMPAT,EPP,ECP,DMA]
Linux agpgart interface v0.101 (c) Dave Jones
agpgart: Detected an Intel 865 Chipset.
agpgart: AGP aperture is 32M @ 0xf6000000
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
usb 5-6: new high speed USB device using ehci_hcd and address 6
usb 5-6: configuration #1 chosen from 1 choice
hub 5-6:1.0: USB hub found
hub 5-6:1.0: 4 ports detected
input: ImExPS/2 Logitech Wheel Mouse as /class/input/input2
ts: Compaq touchscreen protocol output
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
ACPI: PCI Interrupt 0000:00:1f.5[B] -> GSI 17 (level, low) -> IRQ 201
PCI: Setting latency timer of device 0000:00:1f.5 to 64
drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 2 if 0 alt
0 proto 2 vid 0x03F0 pid 0x2C17
usbcore: registered new driver usblp
drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver
intel8x0_measure_ac97_clock: measured 165151 usecs
intel8x0: clocking to 48000
ACPI: PCI Interrupt 0000:02:09.0[A] -> GSI 17 (level, low) -> IRQ 201
0000:02:09.0: ttyS1 at I/O 0xe800 (irq = 201) is a 16550A
0000:02:09.0: ttyS2 at I/O 0xe400 (irq = 201) is a 16550A
0000:02:09.0: ttyS3 at I/O 0xe000 (irq = 201) is a 16550A
Couldn't register serial port 0000:02:09.0: -28
usb 3-1: new full speed USB device using uhci_hcd and address 2
usb 3-1: configuration #1 chosen from 1 choice
drivers/usb/class/usblp.c: usblp1: USB Bidirectional printer dev 2 if 0 alt
1 proto 2 vid 0x03F0 pid 0x1204
usb 1-2: new full speed USB device using uhci_hcd and address 3
Adding 2104472k swap on /dev/sda1.  Priority:-1 extents:1 across:2104472k
usb 1-2: configuration #1 chosen from 1 choice
Bluetooth: Core ver 2.10
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: HCI USB driver ver 2.9
EXT3 FS on sda5, internal journal
usb 5-6.1: new full speed USB device using ehci_hcd and address 7
usb 5-6.1: configuration #1 chosen from 1 choice
usbcore: registered new driver hci_usb
usbcore: registered new driver usbserial
drivers/usb/serial/usb-serial.c: USB Serial support registered for generic
usbcore: registered new driver usbserial_generic
drivers/usb/serial/usb-serial.c: USB Serial Driver core
drivers/usb/serial/usb-serial.c: USB Serial support registered for pl2303
pl2303 5-6.1:1.0: pl2303 converter detected
usb 5-6.1: pl2303 converter now attached to ttyUSB0
usbcore: registered new driver pl2303
drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial adaptor driver
loop: loaded (max 8 devices)
device-mapper: ioctl: 4.7.0-ioctl (2006-06-24) initialised:
dm-d...@redhat.com
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3-fs warning: checktime reached, running e2fsck is recommended
EXT3 FS on sda3, internal journal
EXT3-fs: recovery complete.
EXT3-fs: mounted filesystem with ordered data mode.
skge eth0: enabling interface
skge eth0: Link is up at 1000 Mbps, full duplex, flow control tx and rx
ACPI: Power Button (FF) [PWRF]
ACPI: Power Button (CM) [PWRB]
lp0: using parport0 (interrupt-driven).
ppdev: user-space parallel port driver
Bluetooth: L2CAP ver 2.8
Bluetooth: L2CAP socket layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM ver 1.8
[drm] Initialized drm 1.0.1 20051102
ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 177
[drm] Initialized mga 3.2.1 20051102 on minor 0
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: Device is in legacy mode, falling back to 2.x
agpgart: Putting AGP V2 device at 0000:00:00.0 into 1x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 1x mode


Prova a guarda con top e iostat il carico della macchina se vedi
qualcosa di strano.
Hai  il kernel preemptive?
Ciao
Ercole

 Ercole
Avevo guardato con top, ma il consumo CPU era praticamente a zero.
Non ho provato iostat, lo farò.
il kernel ha i seguenti valori:
"Preemption Model" = "No Forced Preemption"
"Preempt The Big Kernel Lock" = "OFF"
"HPET Timer Support" = "YES"
Grazie e ciao.
Gabriele


Se lo usi principalmente da desktop ti conviene cambiare il preemption
model a Preemptible Kernel e attivare	il Big Kernel Lock, migliora di
parecchio la reattività del sistema.
Ciao
Ercole

 Ercole
Certo, immaginavo.
Dovrò fare alcune prove, ma come al solito manca sempre il tempo e si è
sempre di corsa....
Grazie delle dritte, scusa se non ho risposto prima ma il lavoro mi assorbe
completamente!
Ciao,
Gabriele.