Public bug reported:
The below kernel warning is dumped continuously and CapsLd led is flashed.
[ 1574.101807] bad: scheduling from the idle thread!
[ 1574.101812] Pid: 0, comm: swapper/1 Tainted: G C 3.2.0-10-generic
#18-Ubuntu
[ 1574.101815] Call Trace:
[ 1574.101820] [<ffffffff81055229>] dequeue_task_idle+0x39/0x50
[ 1574.101827] [<ffffffff8104fd03>] dequeue_task+0x93/0xb0
[ 1574.101833] [<ffffffff8104fd43>] deactivate_task+0x23/0x30
[ 1574.101839] [<ffffffff81653719>] __schedule+0x579/0x6f0
[ 1574.101845] [<ffffffff81653bbf>] schedule+0x3f/0x60
[ 1574.101851] [<ffffffff816540cd>] schedule_timeout+0x16d/0x320
[ 1574.101857] [<ffffffff81075c10>] ? usleep_range+0x50/0x50
[ 1574.101864] [<ffffffff8165429e>] schedule_timeout_uninterruptible+0x1e/0x20
[ 1574.101869] [<ffffffff81077860>] msleep+0x20/0x30
[ 1574.101895] [<ffffffffa00da324>] intel_wait_for_vblank+0xa4/0xf0 [i915]
[ 1574.101921] [<ffffffffa00dbfb3>] intel_pipe_set_base+0x133/0x2f0 [i915]
[ 1574.101934] [<ffffffffa009bf78>] drm_crtc_helper_set_config+0x758/0xaf0
[drm_kms_helper]
[ 1574.101940] [<ffffffff81353171>] ? fb_set_var+0x1a1/0x310
[ 1574.101952] [<ffffffffa0098786>] drm_fb_helper_pan_display+0x86/0xd0
[drm_kms_helper]
[ 1574.101960] [<ffffffff813528ad>] fb_pan_display+0xbd/0x170
[ 1574.101966] [<ffffffff813636b9>] bit_update_start+0x29/0x60
[ 1574.102021] [<ffffffff81361fb2>] fbcon_switch+0x3b2/0x560
[ 1574.102027] [<ffffffff813cd8b9>] redraw_screen+0x189/0x2a0
[ 1574.102033] [<ffffffff8136069a>] fbcon_blank+0x21a/0x2d0
[ 1574.102040] [<ffffffff8103cbb9>] ? default_spin_lock_flags+0x9/0x10
[ 1574.102047] [<ffffffff8103cbb9>] ? default_spin_lock_flags+0x9/0x10
[ 1574.102053] [<ffffffff8103cbb9>] ? default_spin_lock_flags+0x9/0x10
[ 1574.102058] [<ffffffff81655d5e>] ? _raw_spin_lock_irqsave+0x2e/0x40
[ 1574.102065] [<ffffffff810762b8>] ? lock_timer_base.isra.29+0x38/0x70
[ 1574.102071] [<ffffffff81077673>] ? mod_timer+0x143/0x2f0
[ 1574.102077] [<ffffffff813ce5bc>] do_unblank_screen.part.19+0x9c/0x170
[ 1574.102083] [<ffffffff813ce6d8>] do_unblank_screen+0x48/0x80
[ 1574.102088] [<ffffffff813ce720>] unblank_screen+0x10/0x20
[ 1574.102094] [<ffffffff8131647d>] bust_spinlocks+0x1d/0x40
[ 1574.102100] [<ffffffff81656bef>] oops_end+0x3f/0xf0
[ 1574.102106] [<ffffffff8163c306>] no_context+0x150/0x15d
[ 1574.102112] [<ffffffff8163c4dc>] __bad_area_nosemaphore+0x1c9/0x1e8
[ 1574.102118] [<ffffffff810569cb>] ? enqueue_entity+0xdb/0x290
[ 1574.102124] [<ffffffff8104cb0c>] ? resched_task+0x2c/0x80
[ 1574.102131] [<ffffffff8163c50e>] bad_area_nosemaphore+0x13/0x15
[ 1574.102137] [<ffffffff816598b6>] do_page_fault+0x426/0x520
[ 1574.102143] [<ffffffff81050fe2>] ? ttwu_queue+0x92/0xd0
[ 1574.102148] [<ffffffff8101a6f9>] ? read_tsc+0x9/0x20
[ 1574.102154] [<ffffffff81094055>] ? ktime_get+0x65/0xe0
[ 1574.102160] [<ffffffff81030fed>] ? lapic_next_event+0x1d/0x30
[ 1574.102167] [<ffffffff81099a84>] ? clockevents_program_event+0x74/0x100
[ 1574.102173] [<ffffffff81656235>] page_fault+0x25/0x30
[ 1574.102180] [<ffffffff810349ac>] ? __setup_vector_irq+0xdc/0x150
[ 1574.102186] [<ffffffff810349f4>] ? __setup_vector_irq+0x124/0x150
[ 1574.102192] [<ffffffff810172ce>] setup_vector_irq+0xe/0x10
[ 1574.102197] [<ffffffff81633b9a>] smp_callin+0xeb/0x12c
[ 1574.102202] [<ffffffff81633bed>] start_secondary+0x12/0xdb
[ 1574.102207] [<ffffffff81633bdb>] ? smp_callin+0x12c/0x12c
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-terminal 3.2.1-2ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-10.18-generic 3.2.1
Uname: Linux 3.2.0-10-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Thu Jan 26 14:56:08 2012
ExecutablePath: /usr/bin/gnome-terminal
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413.1)
ProcEnviron:
SHELL=/bin/bash
PATH=(cususername, user)
LANG=en_US.UTF-8
SourcePackage: gnome-terminal
UpgradeStatus: Upgraded to precise on 2012-01-25 (1 days ago)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise running-unity
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https://bugs.launchpad.net/bugs/921944
Title:
[precise] linux kernel: bad: scheduling from the idle thread!
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