Same problem here. Happened after I moved the HDD to a new box.
dmesg:
[36487.119709] NETDEV WATCHDOG: eth0: transmit timed out
[36487.119717] eth0: transmit timed out, tx_status 00 status 8601.
[36487.119723] diagnostics: net 0cfa media 8880 dma 0000003a fifo 8000
[36487.119726] eth0: Interrupt posted but not delivered -- IRQ blocked by
another device?
[36487.119829] Flags; bus-master 1, dirty 3775454(14) current 3775454(14)
[36487.119832] Transmit list 00000000 vs. f7d67ac0.
[36487.119836] 0: @f7d67200 length 8000004e status 0001004e
[36487.119838] 1: @f7d672a0 length 80000042 status 00010042
[36487.119840] 2: @f7d67340 length 80000042 status 00010042
[36487.119843] 3: @f7d673e0 length 80000042 status 00010042
[36487.119845] 4: @f7d67480 length 80000042 status 00010042
[36487.119848] 5: @f7d67520 length 80000042 status 00010042
[36487.119850] 6: @f7d675c0 length 80000036 status 00010036
[36487.119852] 7: @f7d67660 length 8000004e status 0001004e
[36487.119855] 8: @f7d67700 length 8000004e status 0001004e
[36487.119857] 9: @f7d677a0 length 8000004e status 0001004e
[36487.119859] 10: @f7d67840 length 8000004e status 0001004e
[36487.119862] 11: @f7d678e0 length 8000004e status 0001004e
[36487.119864] 12: @f7d67980 length 80000042 status 80010042
[36487.119867] 13: @f7d67a20 length 8000004e status 8001004e
[36487.119869] 14: @f7d67ac0 length 80000042 status 00010042
[36487.119872] 15: @f7d67b60 length 800005e2 status 000105e2
[36487.119876] eth0: Resetting the Tx ring pointer.
uname:
Linux rogue 2.6.20-16-generic #2 SMP Wed May 23 01:46:23 UTC 2007 i686 GNU/Linux
lspci:
00:00.0 Host bridge: nVidia Corporation nForce3 250Gb Host Bridge (rev a1)
00:01.0 ISA bridge: nVidia Corporation nForce3 250Gb LPC Bridge (rev a2)
00:01.1 SMBus: nVidia Corporation nForce 250Gb PCI System Management (rev a1)
00:02.0 USB Controller: nVidia Corporation CK8S USB Controller (rev a1)
00:02.1 USB Controller: nVidia Corporation CK8S USB Controller (rev a1)
00:02.2 USB Controller: nVidia Corporation nForce3 EHCI USB 2.0 Controller (rev
a2)
00:08.0 IDE interface: nVidia Corporation CK8S Parallel ATA Controller (v2.5)
(rev a2)
00:0a.0 IDE interface: nVidia Corporation CK8S Serial ATA Controller (v2.5)
(rev a2)
00:0b.0 PCI bridge: nVidia Corporation nForce3 250Gb AGP Host to PCI Bridge
(rev a2)
00:0e.0 PCI bridge: nVidia Corporation nForce3 250Gb PCI-to-PCI Bridge (rev a2)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address
Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM
Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Miscellaneous Control
01:00.0 VGA compatible controller: nVidia Corporation NV44A [GeForce 6200] (rev
a1)
02:07.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 08)
02:08.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 74)
02:09.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 74)
02:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
/proc/interrupts :
CPU0
0: 9207088 IO-APIC-edge timer
1: 2 IO-APIC-edge i8042
6: 5 IO-APIC-edge floppy
7: 1 IO-APIC-edge parport0
8: 3 IO-APIC-edge rtc
9: 0 IO-APIC-fasteoi acpi
10: 0 IO-APIC-edge MPU401 UART
14: 79160 IO-APIC-edge ide0
16: 0 IO-APIC-fasteoi ohci_hcd:usb1
17: 4381 IO-APIC-fasteoi ohci_hcd:usb2
18: 3 IO-APIC-fasteoi ehci_hcd:usb3
19: 0 IO-APIC-fasteoi libata
20: 7507139 IO-APIC-fasteoi eth0
21: 722950 IO-APIC-fasteoi eth2
22: 2249730 IO-APIC-fasteoi nvidia
23: 39967 IO-APIC-fasteoi Ensoniq AudioPCI
NMI: 0
LOC: 9207215
ERR: 1
MIS: 6
--
3com NIC stops working after some time
https://bugs.launchpad.net/bugs/109629
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