** Description changed:

  Binary package hint: xserver-xorg-video-ati
  
  Ubuntu 9.04 out of the box has poor video performance on my Acer Aspire
  5100.
  
  the solution provided on the following page works for me: 
  
http://www.linuxinsight.com/your-ati-radeon-very-slow-on-xorg-x-server-1.3.html
  
  specifically, I have pasted the following into my xorg.conf:
  
  Section "Device"
   Identifier "ATI Radeon"
   Driver "ati"
   Option "AccelMethod" "EXA"
   Option "MigrationHeuristic" "greedy"
   Option "AccelDFS" "true"
   Option "EnablePageFlip" "true"
   Option "EnableDepthMoves" "true"
  EndSection
  
  I'm using Ubuntu 9.04
  
  ProblemType: Bug
  Architecture: i386
  DistroRelease: Ubuntu 9.04
  Package: xserver-xorg-video-radeon 1:6.12.1-0ubuntu2
  ProcEnviron:
   LANGUAGE=
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersion: Linux version 2.6.28-11-generic (bui...@palmer) (gcc version 
4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009
  SourcePackage: xserver-xorg-video-ati
  Uname: Linux 2.6.28-11-generic i686
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: ATI Technologies Inc RS480 Host Bridge 
[1002:5950] (rev 10)
+       Subsystem: Acer Incorporated [ALI] Device [1025:009f]
+ 01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS482 [Radeon 
Xpress 200M] [1002:5975]
+       Subsystem: Acer Incorporated [ALI] Device [1025:009f]

-- 
scrolling (and other effects) extremely slow
https://bugs.launchpad.net/bugs/370441
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