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[toothbrush <paul@xxxxxxxxxxxx>]

** Also affects: xserver-xorg-video-intel (Arch Linux)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1324173

Title:
  Screen flickers black and backtraces in dmesg

Status in “xserver-xorg-video-intel” package in Ubuntu:
  Confirmed
Status in “xserver-xorg-video-intel” package in Arch Linux:
  New

Bug description:
  Using newest utopic my screen flickers to black and back every now and
  then during regular use. After a few seconds it comes back. Whenever
  this happens I get an error trace in dmesg. All of them are slightly
  different, here is an example one:

  [55848.787245] CPU: 3 PID: 15271 Comm: kworker/3:2 Tainted: G        W  OE 3.15.0-2-generic #6-Ubuntu
  [55848.787248] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B07.1402121134 02/12/2014
  [55848.787252] Workqueue: pm pm_runtime_work
  [55848.787255]  0000000000000009 ffff8803a94c1c20 ffffffff81729283 ffff8803a94c1c68
  [55848.787260]  ffff8803a94c1c58 ffffffff81066a5d ffff880453fe0000 ffff880453948378
  [55848.787266]  ffff880453948380 0000000000000000 ffff880458a71098 ffff8803a94c1cb8
  [55848.787271] Call Trace:
  [55848.787275]  [<ffffffff81729283>] dump_stack+0x45/0x56
  [55848.787281]  [<ffffffff81066a5d>] warn_slowpath_common+0x7d/0xa0
  [55848.787286]  [<ffffffff81066acc>] warn_slowpath_fmt+0x4c/0x50
  [55848.787322]  [<ffffffffa00f2e6e>] hsw_enable_pc8+0x64e/0x6f0 [i915]
  [55848.787330]  [<ffffffff813a43e0>] ? pci_legacy_suspend_late+0xf0/0xf0
  [55848.787350]  [<ffffffffa00a0500>] i915_runtime_suspend+0x80/0xd0 [i915]
  [55848.787361]  [<ffffffff813a4441>] pci_pm_runtime_suspend+0x61/0x140
  [55848.787368]  [<ffffffff813a43e0>] ? pci_legacy_suspend_late+0xf0/0xf0
  [55848.787373]  [<ffffffff81495d36>] __rpm_callback+0x36/0xc0
  [55848.787379]  [<ffffffff81080d49>] ? try_to_grab_pending+0xa9/0x160
  [55848.787384]  [<ffffffff81495de4>] rpm_callback+0x24/0x80
  [55848.787389]  [<ffffffff81495f51>] rpm_suspend+0x111/0x640
  [55848.787394]  [<ffffffff814976c2>] pm_runtime_work+0xb2/0xe0
  [55848.787401]  [<ffffffff810826b2>] process_one_work+0x182/0x450
  [55848.787408]  [<ffffffff810834a1>] worker_thread+0x121/0x410
  [55848.787414]  [<ffffffff81083380>] ? rescuer_thread+0x430/0x430
  [55848.787420]  [<ffffffff8108a059>] kthread+0xc9/0xe0
  [55848.787426]  [<ffffffff81089f90>] ? kthread_create_on_node+0x190/0x190
  [55848.787431]  [<ffffffff8173a2bc>] ret_from_fork+0x7c/0xb0
  [55848.787436]  [<ffffffff81089f90>] ? kthread_create_on_node+0x190/0x190
  [55848.787439] ---[ end trace 9a13d45f13da41fc ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  ProcVersionSignature: Ubuntu 3.15.0-2.6-generic 3.15.0-rc6
  Uname: Linux 3.15.0-2-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.2-0ubuntu4
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Wed May 28 18:38:19 2014
  DistUpgraded: 2014-05-27 12:43:31,956 DEBUG enabling apt cron job
  DistroCodename: utopic
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 4.3.10, 3.13.0-27-generic, x86_64: installed
   virtualbox, 4.3.10, 3.15.0-2-generic, x86_64: installed
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Device [8086:0a2e] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Apple Inc. Device [106b:011a]
  InstallationDate: Installed on 2014-05-22 (6 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64+mac (20140417)
  MachineType: Apple Inc. MacBookPro11,1
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.15.0-2-generic root=UUID=aec3f04d-865c-4f0f-9872-d8953e94278d ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: Upgraded to utopic on 2014-05-27 (1 days ago)
  dmi.bios.date: 02/12/2014
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP111.88Z.0138.B07.1402121134
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-189A3D4F975D5FFC
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro11,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-189A3D4F975D5FFC
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP111.88Z.0138.B07.1402121134:bd02/12/2014:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC:
  dmi.product.name: MacBookPro11,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  version.compiz: compiz 1:0.9.11+14.04.20140423-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.54-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu5
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu4
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Tue May 27 15:51:39 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               40992 
   vendor                                     APP
  xserver.version: 2:1.15.1-0ubuntu5

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