[   30.545460] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0
[   35.800021] eth0: no IPv6 routers present
[   38.899684] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0
[  349.115814] CPU0: Core temperature above threshold, cpu clock throttled (total events = 1)
[  349.115838] Disabling lock debugging due to kernel taint
[  349.116726] CPU0: Core temperature/speed normal
[  600.000072] [Hardware Error]: Machine check events logged
[  724.688427] eth0: Media Link Off
[  744.016043] ------------[ cut here ]------------
[  744.016065] WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x213/0x220()
[  744.016070] Hardware name: System Name
[  744.016074] NETDEV WATCHDOG: eth0 (sis900): transmit queue 0 timed out
[  744.016078] Modules linked in: binfmt_misc snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer ppdev snd_seq_device ns558 snd parport_pc gameport psmouse soundcore i2c_sis96x shpchp sis_agp snd_page_alloc serio_raw lp parport usb_storage uas sis900 btrfs zlib_deflate libcrc32c
[  744.016141] Pid: 2133, comm: firefox-bin Tainted: G   M        2.6.38-5-generic #32-Ubuntu
[  744.016146] Call Trace:
[  744.016160]  [<c104fa42>] ? warn_slowpath_common+0x72/0xa0
[  744.016168]  [<c1449d53>] ? dev_watchdog+0x213/0x220
[  744.016173]  [<c1449d53>] ? dev_watchdog+0x213/0x220
[  744.016179]  [<c104fb13>] ? warn_slowpath_fmt+0x33/0x40
[  744.016184]  [<c1449d53>] ? dev_watchdog+0x213/0x220
[  744.016191]  [<c1069221>] ? __queue_work+0xe1/0x360
[  744.016197]  [<c1079acb>] ? clocksource_watchdog+0x2b/0x260
[  744.016206]  [<c105c7cb>] ? call_timer_fn+0x2b/0xe0
[  744.016215]  [<c15092cd>] ? _raw_spin_lock+0xd/0x10
[  744.016220]  [<c1449b40>] ? dev_watchdog+0x0/0x220
[  744.016225]  [<c105db09>] ? run_timer_softirq+0xe9/0x1e0
[  744.016230]  [<c1449b40>] ? dev_watchdog+0x0/0x220
[  744.016236]  [<c10566a2>] ? __do_softirq+0x82/0x170
[  744.016241]  [<c1056620>] ? __do_softirq+0x0/0x170
[  744.016245]  <IRQ>  [<c105686d>] ? irq_exit+0x6d/0x80
[  744.016256]  [<c151038b>] ? smp_apic_timer_interrupt+0x5b/0x8a
[  744.016262]  [<c1509b79>] ? apic_timer_interrupt+0x31/0x38
[  744.016267]  [<c1500000>] ? early_init_intel+0xf7/0x130
[  744.016272] ---[ end trace 24dcba6cdb367f6b ]---
[  744.016279] eth0: Transmit timeout, status 00000004 00000000
[  744.721114] eth0: Media Link On 100mbps full-duplex
[  780.784415] eth0: Media Link Off
[  805.008056] eth0: Transmit timeout, status 00000004 00000040
[  813.008053] eth0: Transmit timeout, status 00000004 00000000
[  821.008057] eth0: Transmit timeout, status 00000004 00000000
[  821.825155] eth0: Media Link On 100mbps full-duplex
[  832.848429] eth0: Media Link Off