reboot de serveur, et aucune piste du pourquoi ???

Bonjour,

j'ai un serveur perso qui tourne sous GNU/linux Debian woody et qui fait
plein de choses :
- hot spot wifi
- routeur Internet
- firewall
- werveur ouèbe
- serveur de mail (SMTP/IMAP/webmail)
- serveur de news
- serveur de fichiers (NFS/SMB) avec du LVM
- ... des trucs que j'oublie encore !

depuis quelques jours, ce PC reboote tout seul !

hole:/home/rico# last
rico pts/0 192.168.12.58 Wed Feb 9 09:05 still logged in
reboot system boot 2.4.26 Wed Feb 9 07:01 (02:12)
reboot system boot 2.4.26 Wed Feb 9 06:31 (02:42)
reboot system boot 2.4.26 Tue Feb 8 23:11 (10:02)
reboot system boot 2.4.26 Tue Feb 8 22:31 (10:42)
reboot system boot 2.4.26 Tue Feb 8 20:36 (12:37)
reboot system boot 2.4.26 Tue Feb 8 19:26 (13:47)
reboot system boot 2.4.26 Tue Feb 8 17:46 (15:27)
rico pts/0 192.168.12.58 Tue Feb 8 16:43 - crash (01:02)
reboot system boot 2.4.26 Tue Feb 8 16:34 (16:39)
rico pts/0 192.168.12.58 Tue Feb 8 14:42 - crash (01:52)
reboot system boot 2.4.26 Tue Feb 8 14:26 (18:47)
rico pts/0 192.168.12.58 Tue Feb 8 11:33 - crash (02:52)
reboot system boot 2.4.26 Tue Feb 8 11:31 (21:42)
rico pts/1 192.168.12.58 Tue Feb 8 11:25 - crash (00:06)
rico pts/0 192.168.12.58 Tue Feb 8 11:17 - crash (00:14)
reboot system boot 2.4.26 Tue Feb 8 10:36 (22:37)
rico pts/1 192.168.12.58 Tue Feb 8 09:34 - crash (01:02)
rico pts/0 192.168.12.58 Tue Feb 8 09:12 - crash (01:23)

Je ne trouve aucune trace de crash dans mes logs et je n'ai vraiment
aucune idée de ce qui peut bien se passer... Alors je suis ouvert à
toutes les suggestions...

Voici mon dmesg :


hole:/home/rico# cat /var/log/dmesg
Linux version 2.4.26 (root@devtux) (gcc version 2.95.4 20011002 (Debian
prerelease)) #1 lun jun 28 22:46:40 CEST 2004
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000001ffec000 (usable)
BIOS-e820: 000000001ffec000 - 000000001ffef000 (ACPI data)
BIOS-e820: 000000001ffef000 - 000000001ffff000 (reserved)
BIOS-e820: 000000001ffff000 - 0000000020000000 (ACPI NVS)
BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
511MB LOWMEM available.
On node 0 totalpages: 131052
zone(0): 4096 pages.
zone(1): 126956 pages.
zone(2): 0 pages.
ACPI: RSDP (v000 ASUS ) @ 0x000f6d90
ACPI: RSDT (v001 ASUS A7V266 0x30303031 MSFT 0x31313031) @ 0x1ffec000
ACPI: FADT (v001 ASUS A7V266 0x30303031 MSFT 0x31313031) @ 0x1ffec080
ACPI: BOOT (v001 ASUS A7V266 0x30303031 MSFT 0x31313031) @ 0x1ffec040
ACPI: DSDT (v001 ASUS A7V266 0x00001000 MSFT 0x0100000b) @ 0x00000000
Kernel command line: auto BOOT_IMAGE=Linux_2.4.26 ro root=806
Initializing CPU#0
Detected 1477.400 MHz processor.
Console: colour dummy device 80x25
Calibrating delay loop... 2949.12 BogoMIPS
Memory: 515088k/524208k available (1877k kernel code, 8732k reserved,
780k data, 112k init, 0k highmem)
Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
Inode cache hash table entries: 32768 (order: 6, 262144 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 32768 (order: 5, 131072 bytes)
Page-cache hash table entries: 131072 (order: 7, 524288 bytes)
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 256K (64 bytes/line)
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: After generic, caps: 0383f9ff c1cbf9ff 00000000 00000000
CPU: Common caps: 0383f9ff c1cbf9ff 00000000 00000000
CPU: AMD Athlon(TM) XP1700+ stepping 02
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.40 (20010327) Richard Gooch (rgooch@atnf.csiro.au)
mtrr: detected mtrr type: Intel
ACPI: Subsystem revision 20040326
PCI: PCI BIOS revision 2.10 entry at 0xf0ec0, last bus=1
PCI: Using configuration type 1
ACPI: IRQ9 SCI: Level Trigger.
ACPI-0165: *** Error: No object was returned from
[\_SB_.PCI0.PX40.UAR2._STA] (Node c1596300), AE_NOT_EXIST
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: System [ACPI] (supports S0 S1 S4 S5)
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
PCI: Probing PCI hardware
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 11
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 9
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 10
PCI: Using ACPI for IRQ routing
PCI: if you experience problems, try using option 'pci=noacpi' or even
'acpi=off'
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
IA-32 Microcode Update Driver: v1.14 <tigran@veritas.com>
Starting kswapd
VFS: Disk quotas vdquot_6.5.1
Journalled Block Device driver loaded
Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
ACPI: Power Button (FF) [PWRF]
ACPI: Processor [CPU0] (supports C1)
parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP]
parport0: irq 7 detected
vesafb: framebuffer at 0xfa000000, mapped to 0xe0813000, size 1536k
vesafb: mode is 1024x768x8, linelength=1024, pages=4
vesafb: protected mode interface info at c000:0590
vesafb: scrolling: redraw
Console: switching to colour frame buffer device 128x48
fb0: VESA VGA frame buffer device
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ
SERIAL_PCI ISAPNP enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
Linux agpgart interface v0.99 (c) Jeff Hartmann
agpgart: Maximum main memory to use for agp memory: 439M
agpgart: Detected Via Apollo Pro KT266 chipset
agpgart: AGP aperture is 32M @ 0xfc000000
Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
VP_IDE: IDE controller at PCI slot 00:11.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
VP_IDE: VIA vt8233 (rev 00) IDE UDMA100 controller on pci00:11.1
ide0: BM-DMA at 0xb400-0xb407, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xb408-0xb40f, BIOS settings: hdc:DMA, hdd:pio
hda: ST3120026A, ATA DISK drive
blk: queue c03e1300, I/O limit 4095Mb (mask 0xffffffff)
hdc: ST3120026A, ATA DISK drive
blk: queue c03e176c, I/O limit 4095Mb (mask 0xffffffff)
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: attached ide-disk driver.
hda: host protected area => 1
hda: 234441648 sectors (120034 MB) w/8192KiB Cache, CHS=14593/255/63,
UDMA(100)
hdc: attached ide-disk driver.
hdc: host protected area => 1
hdc: 234441648 sectors (120034 MB) w/8192KiB Cache, CHS=14593/255/63,
UDMA(100)
Partition check:
hda: unknown partition table
hdc: unknown partition table
SCSI subsystem driver Revision: 1.00
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
<Adaptec 2940 Ultra SCSI adapter>
aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs

(scsi0:A:0): 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
Vendor: IBM Model: DDRS-34560W Rev: S97B
Type: Direct-Access ANSI SCSI revision: 02
(scsi0:A:1): 20.000MB/s transfers (20.000MHz, offset 15)
Vendor: IBM Model: DDRS-39130 Rev: S97B
Type: Direct-Access ANSI SCSI revision: 02
(scsi0:A:2): 20.000MB/s transfers (20.000MHz, offset 15)
Vendor: IBM Model: DDRS-39130 Rev: S97B
Type: Direct-Access ANSI SCSI revision: 02
(scsi0:A:5): 20.000MB/s transfers (20.000MHz, offset 7)
Vendor: YAMAHA Model: CRW2100S Rev: 1.0H
Type: CD-ROM ANSI SCSI revision: 02
(scsi0:A:6): 5.000MB/s transfers (5.000MHz, offset 8)
Vendor: SONY Model: SDT-5000 Rev: 325H
Type: Sequential-Access ANSI SCSI revision: 02
scsi0:A:0:0: Tagged Queuing enabled. Depth 253
scsi0:A:1:0: Tagged Queuing enabled. Depth 253
scsi0:A:2:0: Tagged Queuing enabled. Depth 253
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0
Attached scsi disk sdc at scsi0, channel 0, id 2, lun 0
SCSI device sda: 8925000 512-byte hdwr sectors (4570 MB)
sda: sda1 sda2 < sda5 sda6 >
SCSI device sdb: 17850000 512-byte hdwr sectors (9139 MB)
sdb: unknown partition table
SCSI device sdc: 17850000 512-byte hdwr sectors (9139 MB)
sdc: unknown partition table
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
host/usb-uhci.c: $Revision: 1.275 $ time 22:49:08 Jun 28 2004
host/usb-uhci.c: High bandwidth mode enabled
host/usb-uhci.c: USB UHCI at I/O 0xb000, IRQ 9
host/usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
host/usb-uhci.c: USB UHCI at I/O 0xa800, IRQ 9
host/usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected
host/usb-uhci.c: USB UHCI at I/O 0xa400, IRQ 9
host/usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 3
hub.c: USB hub found
hub.c: 2 ports detected
host/usb-uhci.c: v1.275:USB Universal Host Controller Interface driver
I2O Core - (C) Copyright 1999 Red Hat Software
I2O: Event thread created as pid 13
I2O configuration manager v 0.04.
(C) Copyright 1999 Red Hat Software
i2c-core.o: i2c core module version 2.8.4 (20040207)
i2c-dev.o: i2c /dev entries driver module version 2.8.4 (20040207)
i2c-proc.o version 2.8.4 (20040207)
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
LVM version 1.0.8(17/11/2003)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
Initializing Cryptographic API
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 4096 buckets, 32Kbytes
TCP: Hash tables configured (established 32768 bind 32768)
ip_conntrack version 2.1 (4095 buckets, 32760 max) - 288 bytes per
conntrack
ip_tables: (C) 2000-2002 Netfilter core team
arp_tables: (C) 2002 David S. Miller
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NET4: Ethernet Bridge 008 for NET4.0
EXT3-fs: INFO: recovery required on readonly filesystem.
EXT3-fs: write access will be enabled during recovery.
kjournald starting. Commit interval 5 seconds
EXT3-fs: sd(8,6): orphan cleanup on readonly fs
ext3_orphan_cleanup: deleting unreferenced inode 97948
ext3_orphan_cleanup: deleting unreferenced inode 97923
EXT3-fs: sd(8,6): 2 orphan inodes deleted
EXT3-fs: recovery complete.
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.
Freeing unused kernel memory: 112k freed
Adding Swap: 265032k swap-space (priority -1)
EXT3 FS 2.4-0.9.19, 19 August 2002 on sd(8,6), internal journal
Real Time Clock Driver v1.10f
PCI: Enabling device 00:10.0 (0014 -> 0017)
3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
See Documentation/networking/vortex.txt
00:10.0: 3Com PCI 3c905B Cyclone 100baseTx at 0xb800. Vers LK1.1.18-ac
00:04:76:19:94:f3, IRQ 9
product code 4d4c rev 00.12 date 02-01-01
Internal config register is 1800000, transceivers 0xa.
8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
MII transceiver found at address 24, status 786d.
Enabling bus-master transmits and whole-frame receives.
00:10.0: scatter/gather enabled. h/w checksums enabled
epic100.c:v1.11 1/7/2001 Written by Donald Becker <becker@scyld.com>
http://www.scyld.com/network/epic100.html
(unofficial 2.4.x kernel port, version 1.11+LK1.1.14, Aug 4, 2002)
PCI: Enabling device 00:0f.0 (0004 -> 0007)
epic100(00:0f.0): MII transceiver #3 control 3000 status 7809.
epic100(00:0f.0): Autonegotiation advertising 01e1 link partner 0001.
eth1: SMSC EPIC/100 83c170 at 0xd000, IRQ 10, 00:e0:29:47:95:44.
Loaded prism54 driver, version 1.2
PCI: Enabling device 00:0d.0 (0014 -> 0016)
eth2: prism54 driver detected card model: SMC2802W
IPv6 v0.8 for NET4.0
IPv6 over IPv4 tunneling driver
i2c-viapro.o version 2.8.6 (20040405)
i2c-dev.o: Registered 'SMBus Via Pro adapter at e800' as minor 0
i2c-isa.o version 2.8.6 (20040405)
i2c-dev.o: Registered 'ISA main adapter' as minor 1
w83781d.o version 2.8.6 (20040405)
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 5, lun 0
sr0: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray
Uniform CD-ROM driver Revision: 3.12
loop: loaded (max 8 devices)
ttyS2: LSR safety check engaged!
ttyS2: LSR safety check engaged!
kjournald starting. Commit interval 5 seconds
EXT3 FS 2.4-0.9.19, 19 August 2002 on lvm(58,2), internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting. Commit interval 5 seconds
EXT3 FS 2.4-0.9.19, 19 August 2002 on lvm(58,0), internal journal
EXT3-fs: mounted filesystem with ordered data mode.
eth2: islpci_open()
eth2: resetting device...
eth2: uploading firmware...
eth2: firmware uploaded done, now triggering reset...
eth2: mgt_commit has failed. Restart the device
hole:/home/rico#


Merci pur votre aide

--
Rico