NETDEV WATCHDOG: usb0 (cdc_ether): transmit queue 0 timed out
Modules linked in: binfmt_misc ppdev bridge stp bnep snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi iptable_filter snd_rawmidi b43 snd_seq_midi_event mac80211 ip_tables snd_seq snd_timer cdc_ether snd_seq_device x_tables usbnet cfg80211 snd joydev soundcore snd_page_alloc dell_wmi dell_laptop dcdbas btusb psmouse serio_raw mii led_class cdc_acm cdc_wdm lp parport uvcvideo videodev v4l1_compat usbhid fbcon tileblit font bitblit softcursor usb_storage sky2 ssb i915 drm i2c_algo_bit video output intel_agp agpgart
Pid: 0, comm: swapper Not tainted 2.6.31-14-generic #48-Ubuntu
Call Trace:
 [<c014518d>] warn_slowpath_common+0x6d/0xa0
 [<c04b07c6>] ? dev_watchdog+0x1f6/0x210
 [<c04b07c6>] ? dev_watchdog+0x1f6/0x210
 [<c0145206>] warn_slowpath_fmt+0x26/0x30
 [<c04b07c6>] dev_watchdog+0x1f6/0x210
 [<c0157fdb>] ? insert_work+0x5b/0xa0
 [<c0127c38>] ? default_spin_lock_flags+0x8/0x10
 [<c05707da>] ? _spin_lock_irqsave+0x2a/0x40
 [<c0158371>] ? __queue_work+0x31/0x40
 [<c01501b7>] run_timer_softirq+0x117/0x200
 [<c016a125>] ? tick_dev_program_event+0x45/0xe0
 [<c04b05d0>] ? dev_watchdog+0x0/0x210
 [<c014b3b0>] __do_softirq+0x90/0x1a0
 [<c015ff63>] ? hrtimer_interrupt+0x183/0x210
 [<c014b4fd>] do_softirq+0x3d/0x40
 [<c014b63d>] irq_exit+0x5d/0x70
 [<c011dcf7>] smp_apic_timer_interrupt+0x57/0x90
 [<c0103d71>] apic_timer_interrupt+0x31/0x40
 [<c0369b02>] ? acpi_idle_enter_simple+0xfd/0x130
 [<c0468406>] cpuidle_idle_call+0x76/0xd0
 [<c010202c>] cpu_idle+0x8c/0xd0
 [<c055e875>] rest_init+0x55/0x60
 [<c078e8cd>] start_kernel+0x2e6/0x2ec
 [<c078e406>] ? unknown_bootoption+0x0/0x1ab
 [<c078e07c>] i386_start_kernel+0x7c/0x83
---[ end trace 4824256241c6778d ]---