I have the same bug. My ethernet breaks and I have this log in dmesg:
5074.973070] atl1c 0000:09:00.0: irq 30 for MSI/MSI-X
[ 5074.973147] atl1c 0000:09:00.0: atl1c: eth0 NIC Link is Up<100 Mbps Full
Duplex>
[ 5129.988870] ------------[ cut here ]------------
[ 5129.988879] WARNING: at
/build/buildd/linux-2.6.32/net/sched/sch_generic.c:261
dev_watchdog+0x1fe/0x210()
[ 5129.988881] Hardware name: Extensa 5635G
[ 5129.988883] NETDEV WATCHDOG: eth0 (atl1c): transmit queue 0 timed out
[ 5129.988885] Modules linked in: usbhid hid rfcomm sco bridge stp ppdev bnep
l2cap vboxdrv binfmt_misc snd_hda_codec_conexant snd_hda_intel snd_hda_codec
snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm joydev snd_seq_dummy snd_seq_oss
snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer arc4
snd_seq_device iwlagn uvcvideo iwlcore psmouse videodev snd nvidia(P) intel_agp
fbcon soundcore serio_raw atl1c btusb v4l1_compat mac80211 agpgart vga16fb lp
video acer_wmi tileblit snd_page_alloc cfg80211 font output parport vgastate
bitblit bluetooth softcursor led_class dm_raid45 xor
[ 5129.988944] Pid: 7, comm: ksoftirqd/1 Tainted: P 2.6.32-16-generic
#25-Ubuntu
[ 5129.988946] Call Trace:
[ 5129.988952] [<c014a9d2>] warn_slowpath_common+0x72/0xa0
[ 5129.988956] [<c04ea25e>] ? dev_watchdog+0x1fe/0x210
[ 5129.988959] [<c04ea25e>] ? dev_watchdog+0x1fe/0x210
[ 5129.988962] [<c014aa4b>] warn_slowpath_fmt+0x2b/0x30
[ 5129.988965] [<c04ea25e>] dev_watchdog+0x1fe/0x210
[ 5129.988970] [<c015a331>] ? mod_timer+0x101/0x1e0
[ 5129.988973] [<c015a426>] ? add_timer+0x16/0x20
[ 5129.988976] [<c0159c2d>] run_timer_softirq+0x13d/0x2c0
[ 5129.988979] [<c04ea060>] ? dev_watchdog+0x0/0x210
[ 5129.988983] [<c0151668>] __do_softirq+0x98/0x1b0
[ 5129.988986] [<c01517c5>] do_softirq+0x45/0x50
[ 5129.988989] [<c015182e>] ksoftirqd+0x5e/0xe0
[ 5129.988992] [<c01517d0>] ? ksoftirqd+0x0/0xe0
[ 5129.988996] [<c0165aa4>] kthread+0x74/0x80
[ 5129.988998] [<c0165a30>] ? kthread+0x0/0x80
[ 5129.989014] [<c0104087>] kernel_thread_helper+0x7/0x10
[ 5129.989017] ---[ end trace baf2363b36d8935c ]---
I have notebook Acer Extensa 5635G and ethernet card
09:00.0 Ethernet controller: Atheros Communications AR8131 Gigabit Ethernet
(rev c0)
Subsystem: Acer Incorporated [ALI] Device 0253
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 17
Region 0: Memory at 80800000 (64-bit, non-prefetchable) [size=256K]
Region 2: I/O ports at 5000 [size=128]
Capabilities: <access denied>
Kernel modules: atl1c
--
WARNING: at /build/buildd/linux-2.6.32/net/sched/sch_generic.c:261 dev_watchdog
0x1fe/0x210()
https://bugs.launchpad.net/bugs/533701
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