** Description changed:

- External display randomly(?) blinks with open source radeon gallium driver on 
Ubuntu 13.04 64bit (also 12.04 64bit).
- I tested it with two diffrent monitors and a tv. I think this bug is related 
to the energy-saving power profiles
+ External display randomly(?) blinks (it goes black for a second or two and 
then resumes :) ) with open source radeon gallium driver on Ubuntu 13.04 64bit 
(also 12.04 64bit).
+ I tested it with two diffrent monitors and a tv.
  
- I observed that changong power profile to "mid" helps a lot. Blinks are
- very rare but they still occur. On other profiles [default, auto, low,
- high] blinks occur very often.
+ I think this bug is related to the energy-saving power profiles
+ I observed that changing power profile to "mid" helps a lot. Blinks are very 
rare but they still occur. On other profiles [default, auto, low, high] blinks 
occur very often.
  
- WORKAROUND: 
- To change power method type as root:
+ WORKAROUND:
+ To change power profile type as root:
  
  # echo mid > /sys/class/drm/card0/device/power_profile
+ 
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.8.0-21.32-generic 3.8.8
  Uname: Linux 3.8.0-21-generic x86_64
  .tmp.unity.support.test.0:
-  
+ 
  ApportVersion: 2.9.2-0ubuntu8
  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
  Date: Thu May 23 18:00:22 2013
  DistUpgraded: Fresh install
  DistroCodename: raring
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
-  Advanced Micro Devices [AMD] nee ATI RV620/M82 [Mobility Radeon HD 
3450/3470] [1002:95c4] (prog-if 00 [VGA controller])
-    Subsystem: Sony Corporation Device [104d:9035]
+  Advanced Micro Devices [AMD] nee ATI RV620/M82 [Mobility Radeon HD 
3450/3470] [1002:95c4] (prog-if 00 [VGA controller])
+    Subsystem: Sony Corporation Device [104d:9035]
  InstallationDate: Installed on 2013-05-20 (3 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Sony Corporation VGN-FW11E
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-21-generic 
root=UUID=3dea0386-ee43-4455-a881-2a741cd7aeba ro quiet splash pcie_aspm=force 
acpi_sleep=nonvs vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/07/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: R0270Y0
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrR0270Y0:bd10/07/2009:svnSonyCorporation:pnVGN-FW11E:pvrC600DCFX:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VGN-FW11E
  dmi.product.version: C600DCFX
  dmi.sys.vendor: Sony Corporation
  version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.43-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.1-0ubuntu3
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.1-0ubuntu3
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.7-0ubuntu1
  xserver.bootTime: Thu May 23 16:17:37 2013
  xserver.configfile: default
  xserver.errors:
-  
+ 
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.13.3-0ubuntu6
  xserver.video_driver: radeon

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https://bugs.launchpad.net/bugs/1183437

Title:
  External display blinks [gallium, radeon, possible power method
  related]

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