In case it may help, my syslog trace:
Apr 19 17:21:11 chercq kernel: [26030.421259] iphone-set-info[27164]: segfault
at 8 ip 00007ff07f0bd5d1 sp 00007fff6bf10478 error 4 in
libc-2.13.so[7ff07f03b000+18a000]
Apr 19 17:21:12 chercq vpnagent[2164]: Function: tableCallbackHandler File:
RouteMgr.cpp Line: 1692 Invoked Function: recv Return Code: 11 (0x0000000B)
Description: unknown
Apr 19 17:21:12 chercq avahi-daemon[1312]: Joining mDNS multicast group on
interface eth1.IPv6 with address fe80::581f:aaff:fe45:aadf.
Apr 19 17:21:12 chercq avahi-daemon[1312]: New relevant interface eth1.IPv6 for
mDNS.
Apr 19 17:21:12 chercq avahi-daemon[1312]: Registering new address record for
fe80::581f:aaff:fe45:aadf on eth1.*.
Apr 19 17:21:12 chercq vpnagent[2164]: Function: tableCallbackHandler File:
RouteMgr.cpp Line: 1692 Invoked Function: recv Return Code: 11 (0x0000000B)
Description: unknown
Apr 19 17:21:14 chercq dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 port
67 interval 8
Apr 19 17:21:15 chercq kernel: [26034.060013] ------------[ cut here
]------------
Apr 19 17:21:15 chercq kernel: [26034.060021] WARNING: at
/build/buildd/linux-2.6.38/net/sched/sch_generic.c:256
dev_watchdog+0x2a0/0x2b0()
Apr 19 17:21:15 chercq kernel: [26034.060023] Hardware name: HP xw4600
Workstation
Apr 19 17:21:15 chercq kernel: [26034.060025] NETDEV WATCHDOG: eth1 (ipheth):
transmit queue 0 timed out
Apr 19 17:21:15 chercq kernel: [26034.060026] Modules linked in: ipheth
iptable_filter ip_tables x_tables binfmt_misc rfcomm sco bnep l2cap vboxnetadp
vboxnetflt vboxdrv vmnet vmblock vsock vmci vmmon snd_hda_codec_realtek
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi
snd_seq_midi_event snd_seq snd_timer snd_seq_device ppdev hp_wmi lp btusb
psmouse snd parport_pc x38_edac soundcore snd_page_alloc edac_core parport
sparse_keymap serio_raw bluetooth xfs exportfs usbhid hid usb_storage uas
radeon ttm drm_kms_helper floppy tg3 firewire_ohci firewire_core ahci drm
i2c_algo_bit libahci crc_itu_t
Apr 19 17:21:15 chercq kernel: [26034.060066] Pid: 0, comm: swapper Tainted: G
I 2.6.38-8-generic #42-Ubuntu
Apr 19 17:21:15 chercq kernel: [26034.060068] Call Trace:
Apr 19 17:21:15 chercq kernel: [26034.060069] <IRQ> [<ffffffff81065cef>] ?
warn_slowpath_common+0x7f/0xc0
Apr 19 17:21:15 chercq kernel: [26034.060076] [<ffffffff81065de6>] ?
warn_slowpath_fmt+0x46/0x50
Apr 19 17:21:15 chercq kernel: [26034.060078] [<ffffffff814ef450>] ?
dev_watchdog+0x2a0/0x2b0
Apr 19 17:21:15 chercq kernel: [26034.060082] [<ffffffff81013ae9>] ?
sched_clock+0x9/0x10
Apr 19 17:21:15 chercq kernel: [26034.060085] [<ffffffff8108ea88>] ?
sched_clock_cpu+0xa8/0x110
Apr 19 17:21:15 chercq kernel: [26034.060087] [<ffffffff814ef1b0>] ?
dev_watchdog+0x0/0x2b0
Apr 19 17:21:15 chercq kernel: [26034.060090] [<ffffffff81074964>] ?
call_timer_fn+0x44/0x130
Apr 19 17:21:15 chercq kernel: [26034.060093] [<ffffffff814ef1b0>] ?
dev_watchdog+0x0/0x2b0
Apr 19 17:21:15 chercq kernel: [26034.060095] [<ffffffff81075fb4>] ?
run_timer_softirq+0x134/0x280
Apr 19 17:21:15 chercq kernel: [26034.060098] [<ffffffff8102c85d>] ?
lapic_next_event+0x1d/0x30
Apr 19 17:21:15 chercq kernel: [26034.060100] [<ffffffff8106d538>] ?
__do_softirq+0xa8/0x1c0
Apr 19 17:21:15 chercq kernel: [26034.060103] [<ffffffff810983ef>] ?
tick_program_event+0x1f/0x30
Apr 19 17:21:15 chercq kernel: [26034.060106] [<ffffffff8100cf1c>] ?
call_softirq+0x1c/0x30
Apr 19 17:21:15 chercq kernel: [26034.060108] [<ffffffff8100ea45>] ?
do_softirq+0x65/0xa0
Apr 19 17:21:15 chercq kernel: [26034.060110] [<ffffffff8106d755>] ?
irq_exit+0x85/0x90
Apr 19 17:21:15 chercq kernel: [26034.060113] [<ffffffff815cafb0>] ?
smp_apic_timer_interrupt+0x70/0x9b
Apr 19 17:21:15 chercq kernel: [26034.060115] [<ffffffff8100c9d3>] ?
apic_timer_interrupt+0x13/0x20
Apr 19 17:21:15 chercq kernel: [26034.060117] <EOI> [<ffffffff814a3acd>] ?
poll_idle+0x1d/0x80
Apr 19 17:21:15 chercq kernel: [26034.060123] [<ffffffff814a3ac3>] ?
poll_idle+0x13/0x80
Apr 19 17:21:15 chercq kernel: [26034.060125] [<ffffffff814a4e89>] ?
menu_select+0x149/0x340
Apr 19 17:21:15 chercq kernel: [26034.060127] [<ffffffff814a3bda>] ?
cpuidle_idle_call+0xaa/0x1b0
Apr 19 17:21:15 chercq kernel: [26034.060131] [<ffffffff8100a266>] ?
cpu_idle+0xa6/0xf0
Apr 19 17:21:15 chercq kernel: [26034.060133] [<ffffffff815a9205>] ?
rest_init+0x75/0x80
Apr 19 17:21:15 chercq kernel: [26034.060137] [<ffffffff81acac8b>] ?
start_kernel+0x3f5/0x400
Apr 19 17:21:15 chercq kernel: [26034.060139] [<ffffffff81aca388>] ?
x86_64_start_reservations+0x132/0x136
Apr 19 17:21:15 chercq kernel: [26034.060142] [<ffffffff81aca253>] ?
zap_identity_mappings+0x3e/0x41
Apr 19 17:21:15 chercq kernel: [26034.060144] [<ffffffff81aca458>] ?
x86_64_start_kernel+0xcc/0xdb
Apr 19 17:21:15 chercq kernel: [26034.060145] ---[ end trace a7919e7f17c0a727
]---
Apr 19 17:21:15 chercq kernel: [26034.060147] ipheth: ipheth_tx_timeout: TX
timeout
Apr 19 17:21:17 chercq vpnagent[2164]: Function: tableCallbackHandler File:
RouteMgr.cpp Line: 1692 Invoked Function: recv Return Code: 11 (0x0000000B)
Description: unknown
Apr 19 17:21:21 chercq kernel: [26039.650013] eth1: no IPv6 routers present
Apr 19 17:21:22 chercq dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 port
67 interval 12
Apr 19 17:21:25 chercq kernel: [26044.050021] ipheth: ipheth_tx_timeout: TX
timeout
Apr 19 17:21:34 chercq dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 port
67 interval 15
Apr 19 17:21:35 chercq kernel: [26054.050011] ipheth: ipheth_tx_timeout: TX
timeout
Apr 19 17:21:49 chercq dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 port
67 interval 10
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https://bugs.launchpad.net/bugs/763327
Title:
WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256
dev_watchdog+0x213/0x220()
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