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[Bug 1042613] Re: intel graphics rc6 power saving causes flickering


[Expired for linux (Ubuntu) because there has been no activity for 60

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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  intel graphics rc6 power saving causes flickering

Status in “linux” package in Ubuntu:

Bug description:
  Since RC6 power saving was enabled by default, disconnecting the power
  cable causes flickering in the screen.

  WORKAROUND: Disable RC6 power saving by adding "i915.i915_enable_rc6=0" to the GRUB_CMDLINE_LINUX_DEFAULT variable in /etc/default/grub and by running:
  sudo update-grub

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-29-generic-pae 3.2.0-29.46
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24
  Uname: Linux 3.2.0-29-generic-pae i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269VB Analog [ALC269VB Analog]
     Subdevices: 0/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: i386
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269VB Analog [ALC269VB Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC0:  giampi     1689 F.... pulseaudio
   /dev/snd/pcmC0D0p:   giampi     1689 F...m pulseaudio
   Card hw:0 'Intel'/'HDA Intel at 0xf7cf8000 irq 45'
     Mixer name	: 'Realtek ALC269VB'
     Components	: 'HDA:10ec0269,10438437,00100100'
     Controls      : 13
     Simple ctrls  : 8
  Date: Tue Aug 28 09:41:13 2012
  HibernationDevice: RESUME=UUID=70fefe68-bbe7-4083-9663-fd32cdb604dc
  InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
  MachineType: ASUSTeK Computer INC. 1001PX
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic-pae root=UUID=a36ef87b-13ea-4ce2-bac3-ebf4d415e6ef ro quiet splash i915.i915_enable_rc6=0 vt.handoff=7
   linux-restricted-modules-3.2.0-29-generic-pae N/A
   linux-backports-modules-3.2.0-29-generic-pae  N/A
   linux-firmware                                1.79
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-05-05 (114 days ago)
  dmi.bios.date: 08/12/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0904
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: 1001PX
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: x.xx
  dmi.chassis.asset.tag: 0x00000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer INC.
  dmi.chassis.version: x.x
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0904:bd08/12/2010:svnASUSTeKComputerINC.:pn1001PX:pvrx.x:rvnASUSTeKComputerINC.:rn1001PX:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
  dmi.product.name: 1001PX
  dmi.product.version: x.x
  dmi.sys.vendor: ASUSTeK Computer INC.

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