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[Starry Sky <mountkin@xxxxxxxxx>]

Thanks Christopher M. Penalver.   I think the bug is already fixed in
the new release.

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https://bugs.launchpad.net/bugs/965914

Title:
  WARNING: at
  /build/buildd/linux-3.0.0/drivers/gpu/drm/i915/i915_drv.c:365
  gen6_gt_force_wake_put+0x4b/0x50 [i915]()

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Occasionally my PC get frozen.  Keyboard, mouse and all other input
  devices lost efficiency. In such case, I have to press the power
  button to shutdown my notepad.

  And sometimes, black stripes appear on the screen. In such case, if I
  restart the corresponding program, the screen returns to normal.

  I find the following lines from syslog.

  Mar 26 15:58:45 starrysky kernel: [  198.509514] userif-2: sent link up event.
  Mar 26 15:58:45 starrysky kernel: [19699.876042] ------------[ cut here ]------------
  Mar 26 15:58:45 starrysky kernel: [19699.876065] WARNING: at /build/buildd/linux-3.0.0/drivers/gpu/drm/i915/i915_drv.c:365 gen6_gt_force_wake_put+0x4b/0x50 [i915]()
  Mar 26 15:58:45 starrysky kernel: [19699.876068] Hardware name: Latitude E6220
  Mar 26 15:58:45 starrysky kernel: [19699.876069] Modules linked in: bnep rfcomm vmnet vsock vmci vmmon binfmt_misc snd_hda_codec_hdmi snd_hda_codec_idt joydev wl(P) lib80211 bcma arc4 ppdev dell_wmi sparse_keymap snd_hda_intel snd_hda_codec snd_hwdep snd_pcm dell_laptop dcdbas snd_seq_midi snd_rawmidi uvcvideo videodev v4l2_compat_ioctl32 snd_seq_midi_event snd_seq parport_pc btusb snd_timer snd_seq_device bluetooth wmi snd psmouse serio_raw soundcore snd_page_alloc brcmsmac(C) brcmutil(C) mac80211 i915 drm_kms_helper cfg80211 crc_ccitt drm mei(C) i2c_algo_bit video lp parport usbhid hid e1000e ahci libahci sdhci_pci sdhci
  Mar 26 15:58:45 starrysky kernel: [19699.876105] Pid: 0, comm: kworker/0:0 Tainted: P         C  3.0.0-16-generic #29-Ubuntu
  Mar 26 15:58:45 starrysky kernel: [19699.876107] Call Trace:
  Mar 26 15:58:45 starrysky kernel: [19699.876108]  <IRQ>  [<ffffffff8105e8ff>] warn_slowpath_common+0x7f/0xc0
  Mar 26 15:58:45 starrysky kernel: [19699.876124]  [<ffffffffa014c840>] ? i915_vblank_swap+0x10/0x10 [i915]
  Mar 26 15:58:45 starrysky kernel: [19699.876128]  [<ffffffff8105e95a>] warn_slowpath_null+0x1a/0x20
  Mar 26 15:58:45 starrysky kernel: [19699.876134]  [<ffffffffa014191b>] gen6_gt_force_wake_put+0x4b/0x50 [i915]
  Mar 26 15:58:45 starrysky kernel: [19699.876142]  [<ffffffffa014c8c4>] i915_hangcheck_elapsed+0x84/0x3f0 [i915]
  Mar 26 15:58:45 starrysky kernel: [19699.876146]  [<ffffffff81011673>] ? native_sched_clock+0x13/0x80
  Mar 26 15:58:45 starrysky kernel: [19699.876150]  [<ffffffff8107a3a0>] ? __queue_work+0x320/0x320
  Mar 26 15:58:45 starrysky kernel: [19699.876157]  [<ffffffffa014c840>] ? i915_vblank_swap+0x10/0x10 [i915]
  Mar 26 15:58:45 starrysky kernel: [19699.876164]  [<ffffffffa014c840>] ? i915_vblank_swap+0x10/0x10 [i915]
  Mar 26 15:58:45 starrysky kernel: [19699.876168]  [<ffffffff8106d736>] call_timer_fn+0x46/0x160
  Mar 26 15:58:45 starrysky kernel: [19699.876172]  [<ffffffff812efe4d>] ? rb_insert_color+0xad/0x150
  Mar 26 15:58:45 starrysky kernel: [19699.876178]  [<ffffffffa014c840>] ? i915_vblank_swap+0x10/0x10 [i915]
  Mar 26 15:58:45 starrysky kernel: [19699.876181]  [<ffffffff8106f062>] run_timer_softirq+0x132/0x2a0
  Mar 26 15:58:45 starrysky kernel: [19699.876185]  [<ffffffff810270cd>] ? lapic_next_event+0x1d/0x30
  Mar 26 15:58:45 starrysky kernel: [19699.876187]  [<ffffffff810660f8>] __do_softirq+0xa8/0x210
  Mar 26 15:58:45 starrysky kernel: [19699.876191]  [<ffffffff81093a2f>] ? tick_program_event+0x1f/0x30
  Mar 26 15:58:45 starrysky kernel: [19699.876195]  [<ffffffff815fc41c>] call_softirq+0x1c/0x30
  Mar 26 15:58:45 starrysky kernel: [19699.876197]  [<ffffffff8100c2d5>] do_softirq+0x65/0xa0
  Mar 26 15:58:45 starrysky kernel: [19699.876200]  [<ffffffff810664de>] irq_exit+0x8e/0xb0
  Mar 26 15:58:45 starrysky kernel: [19699.876203]  [<ffffffff815fcd5e>] smp_apic_timer_interrupt+0x6e/0x99
  Mar 26 15:58:45 starrysky kernel: [19699.876206]  [<ffffffff815fbbd3>] apic_timer_interrupt+0x13/0x20
  Mar 26 15:58:45 starrysky kernel: [19699.876207]  <EOI>  [<ffffffff8134b1bb>] ? intel_idle+0xcb/0x120
  Mar 26 15:58:45 starrysky kernel: [19699.876212]  [<ffffffff8134b19d>] ? intel_idle+0xad/0x120
  Mar 26 15:58:45 starrysky kernel: [19699.876216]  [<ffffffff814b37ad>] cpuidle_idle_call+0x9d/0x280
  Mar 26 15:58:45 starrysky kernel: [19699.876219]  [<ffffffff8100920b>] cpu_idle+0xab/0x100
  Mar 26 15:58:45 starrysky kernel: [19699.876223]  [<ffffffff815d52a9>] start_secondary+0xd9/0xdb
  Mar 26 15:58:45 starrysky kernel: [19699.876226] ---[ end trace 4b9bd915fdd3007b ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-16-generic 3.0.0-16.29
  ProcVersionSignature: Ubuntu 3.0.0-16.29-generic 3.0.20
  Uname: Linux 3.0.0-16-generic x86_64
  NonfreeKernelModules: wl
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  starrysky   3955 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0x7ec60000 irq 43'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:111d76e7,102804a9,00100102 HDA:80862805,80860101,00100000'
     Controls      : 27
     Simple ctrls  : 13
  Date: Tue Mar 27 12:40:40 2012
  HibernationDevice: RESUME=UUID=03e147a2-b549-4217-a0c1-bbd356996e3c
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: Dell Inc. Latitude E6220
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-16-generic root=UUID=eb7bdc15-0fb4-45ac-ae19-d20d539e46a1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-16-generic N/A
   linux-backports-modules-3.0.0-16-generic  N/A
   linux-firmware                            1.60
  SourcePackage: linux
  StagingDrivers: brcmutil mei brcmsmac
  UpgradeStatus: Upgraded to oneiric on 2011-12-13 (104 days ago)
  WifiSyslog:
   
  dmi.bios.date: 10/18/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0JX04H
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA04:bd10/18/2011:svnDellInc.:pnLatitudeE6220:pvr01:rvnDellInc.:rn0JX04H:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6220
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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