Bug 27824

Summary: Screen brightness fluctuates with certain Compiz plug-ins
Product: xorg Reporter: Andreas Modinos <admodinos>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.4 (2008.09)   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Video capture of symptoms with Expo, desktop switch, and zoom none

Description Andreas Modinos 2010-04-24 09:15:55 UTC 
Created attachment 35271 [details]
Video capture of symptoms with Expo, desktop switch, and zoom

Zooming in with Super+Scroll causes the screen to become very dark, practically unreadable. Adjusting Fn+Brightness doesn't fix this, although I can tell the brightness changing slightly. The same thing happens when changing workspaces (Ctrl+Alt+-> or Ctrl+Alt+<-), dragging a window from one workspace to another, or using Expo (Super+E) to view all workspaces simultaneously. Returning to normal zoom level will always restore the correct level of brightness immediately, corresponding to how it might have been adjusted during black out. Darkness applies to everything on the screen, except the cursor which remains bright against everything else.

I originally reported this against the kernel in Launchpad:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/539163

My hardware is ATi FireGL 9000 Mobility, but others have confirmed the bug on at least Radeon Mobility 7500 and Radeon 9200.

Let me know if you need attachments other than those already posted in the Launchpad bug report.
Comment 1 Alex Deucher 2010-04-24 09:18:57 UTC 

*** This bug has been marked as a duplicate of bug 25883 ***

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