system hangs with no warning or errors

[Charles Leggett <CGLeggett@lbl.gov>]

I'm running a dual opteron, debian unstable based system, which hangs
at random intervals with no errors being written to any of the log 
files. I'm currently using a 64 bit kernel 2.6.11-rc5, but I've seen
this behaviour with a series of kernels since 2.6.9. Sometimes the
system sometimes runs for several weeks between hangs, and sometimes
hangs twice in a day. When it hangs, the screen freezes, and is
completely unresponsive to all keyboard/mouse input, and will not
respond to pings over the network. It is not an X problem.

I was previously running CentOS with a 2.4.21 kenel for several months,
and experienced no problems, so I don't think it is a hardware problem.

I know that this is a very anemic bug report, I'm sorry I can't offer
any more information. Any suggestions for things to look for, what
to instrument to get more detailed information, or things to try are
welcome.

Below is a dump of lspci -v:

0000:00:06.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8111 PCI (rev
07) (prog-if 00 [Normal decode])
        Flags: bus master, 66MHz, medium devsel, latency 64
        Bus: primary=00, secondary=03, subordinate=03, sec-latency=64
        I/O behind bridge: 00009000-0000afff
        Memory behind bridge: ff200000-ff3fffff
        Capabilities: [c0] #08 [0086]
        Capabilities: [f0] #08 [8000]

0000:00:07.0 ISA bridge: Advanced Micro Devices [AMD] AMD-8111 LPC (rev
05)
        Subsystem: Advanced Micro Devices [AMD] AMD-8111 LPC
        Flags: bus master, 66MHz, medium devsel, latency 0

0000:00:07.1 IDE interface: Advanced Micro Devices [AMD] AMD-8111 IDE
(rev 03) (prog-if 8a [Master SecP PriP])
        Subsystem: Advanced Micro Devices [AMD] AMD-8111 IDE
        Flags: bus master, medium devsel, latency 32
        I/O ports at ffa0 [size=16]

0000:00:07.2 SMBus: Advanced Micro Devices [AMD] AMD-8111 SMBus 2.0 (rev
02)
        Subsystem: Advanced Micro Devices [AMD] AMD-8111 SMBus 2.0
        Flags: medium devsel, IRQ 9
        I/O ports at b400 [size=32]

0000:00:07.3 Bridge: Advanced Micro Devices [AMD] AMD-8111 ACPI (rev 05)
        Subsystem: Advanced Micro Devices [AMD] AMD-8111 ACPI
        Flags: medium devsel

0000:00:07.5 Multimedia audio controller: Advanced Micro Devices [AMD]
AMD-8111 AC97 Audio (rev 03)
        Subsystem: Tyan Computer: Unknown device 2885
        Flags: bus master, medium devsel, latency 64, IRQ 177
        I/O ports at b800 [size=256]
        I/O ports at bc00 [size=64]

0000:00:0a.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X
Bridge (rev 12) (prog-if 00 [Normal decode])
        Flags: bus master, 66MHz, medium devsel, latency 64
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=64
        Memory behind bridge: ff100000-ff1fffff
        Prefetchable memory behind bridge:
00000000de900000-00000000de900000
        Capabilities: [a0]      Capabilities: [b8] #08 [8000]
        Capabilities: [c0] #08 [004a]

0000:00:0a.1 PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (rev
01) (prog-if 10 [IO-APIC])
        Subsystem: Advanced Micro Devices [AMD]: Unknown device 36c0
        Flags: bus master, medium devsel, latency 0
        Memory at ff4fe000 (64-bit, non-prefetchable) [size=4K]

0000:00:0b.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X
Bridge (rev 12) (prog-if 00 [Normal decode])
        Flags: bus master, 66MHz, medium devsel, latency 64
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
        Capabilities: [a0]      Capabilities: [b8] #08 [8000]

0000:00:0b.1 PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (rev
01) (prog-if 10 [IO-APIC])
        Subsystem: Advanced Micro Devices [AMD]: Unknown device 36c0
        Flags: bus master, medium devsel, latency 0
        Memory at ff4ff000 (64-bit, non-prefetchable) [size=4K]

0000:00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel
        Capabilities: [80] #08 [2101]
        Capabilities: [a0] #08 [2101]
        Capabilities: [c0] #08 [2101]

0000:00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel

0000:00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel

0000:00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel

0000:00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel
        Capabilities: [80] #08 [2101]
        Capabilities: [a0] #08 [2101]
        Capabilities: [c0] #08 [2101]

0000:00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel

0000:00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel

0000:00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
        Flags: fast devsel

0000:02:09.0 Ethernet controller: Broadcom Corporation NetXtreme
BCM5703X Gigabit Ethernet (rev 02)
        Subsystem: Tyan Computer: Unknown device 2885
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 169
        Memory at ff1f0000 (64-bit, non-prefetchable) [size=64K]
        Expansion ROM at ff1e0000 [disabled] [size=64K]
        Capabilities: [40] PCI-X non-bridge device.
        Capabilities: [48] Power Management version 2
        Capabilities: [50] Vital Product Data
        Capabilities: [58] Message Signalled Interrupts: 64bit+
Queue=0/3 Enable-

0000:03:00.0 USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB
(rev 0b) (prog-if 10 [OHCI])
        Subsystem: Advanced Micro Devices [AMD] AMD-8111 USB
        Flags: bus master, medium devsel, latency 64, IRQ 9
        Memory at ff3fd000 (32-bit, non-prefetchable) [size=4K]

0000:03:00.1 USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB
(rev 0b) (prog-if 10 [OHCI])
        Subsystem: Advanced Micro Devices [AMD] AMD-8111 USB
        Flags: bus master, medium devsel, latency 64, IRQ 9
        Memory at ff3fe000 (32-bit, non-prefetchable) [size=4K]

0000:03:0b.0 Unknown mass storage controller: Silicon Image, Inc.
(formerly CMD Technology Inc) SiI 3114 [SATALink/SATARaid] Serial ATA
Controller (rev 02)
        Subsystem: Silicon Image, Inc. (formerly CMD Technology Inc) SiI
3114 [SATALink/SATARaid] Serial ATA Controller
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 177
        I/O ports at ac00 [size=8]
        I/O ports at a800 [size=4]
        I/O ports at a400 [size=8]
        I/O ports at a000 [size=4]
        I/O ports at 9c00 [size=16]
        Memory at ff3ffc00 (32-bit, non-prefetchable) [size=1K]
        Expansion ROM at ff300000 [disabled] [size=512K]
        Capabilities: [60] Power Management version 2

0000:03:0c.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A
IEEE-1394a-2000 Controller (PHY/Link) (prog-if 10 [OHCI])
        Subsystem: Tyan Computer: Unknown device 2885
        Flags: bus master, medium devsel, latency 64, IRQ 185
        Memory at ff3ff000 (32-bit, non-prefetchable) [size=2K]
        Memory at ff3f8000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: [44] Power Management version 2

0000:04:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-8151 System
Controller (rev 13)
        Subsystem: Advanced Micro Devices [AMD] AMD-8151 System
Controller
        Flags: bus master, medium devsel, latency 0
        Memory at f0000000 (32-bit, prefetchable) [size=128M]
        Capabilities: [a0] AGP version 3.0
        Capabilities: [c0] #08 [0060]

0000:04:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8151 AGP
Bridge (rev 13) (prog-if 00 [Normal decode])
        Flags: bus master, 66MHz, medium devsel, latency 64
        Bus: primary=04, secondary=05, subordinate=05, sec-latency=64
        I/O behind bridge: 0000c000-0000cfff
        Memory behind bridge: ff500000-ff5fffff
        Prefetchable memory behind bridge: deb00000-eeafffff

0000:05:00.0 VGA compatible controller: ATI Technologies Inc RV280
[Radeon 9200] (rev 01) (prog-if 00 [VGA])
        Subsystem: Unknown device 17ee:2801
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 193
        Memory at e0000000 (32-bit, prefetchable) [size=128M]
        I/O ports at c800 [size=256]
        Memory at ff5f0000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at ff5c0000 [disabled] [size=128K]
        Capabilities: [58] AGP version 3.0
        Capabilities: [50] Power Management version 2



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		thanks in advance, Charles Leggett

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