[Bug 353245] [NEW] [i945/i950] X is painfully slow on Mac mini Core Duo 1.66 after upgrading from Intrepid to Jaunty

[Sean Sosik-Hamor]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

Build Version/Date:

Description:	Ubuntu jaunty (development branch)
Release:	9.04
Codename:	jaunty

xserver-xorg-video-intel:
  Installed: 2:2.6.3-0ubuntu4
  Candidate: 2:2.6.3-0ubuntu4
  Version table:
 *** 2:2.6.3-0ubuntu4 0
        500 http://archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status


Environment used for testing: 

Mac mini Core Duo 1.66, 2 GB RAM, Intel GMA950 (dmesg reports as 945GM),
20" DVI Cinema Display (1680x1050)

Summary:

X is painfully slow after upgrading from Intrepid to Jaunty. Performance
and screen redraw on Intrepid was quick and clean.

With Visual Effects enabled switching workspaces takes a couple seconds
as the choppy animation jumps from one workspace to the next. Moving
windows around with Wobbly Windows enabled again results in choppy
animations as the window jumps around the screen.

With Visual Effects disabled it becomes usable but is still much slower
than Intrepid. Switching workspaces happens instantly however it then
takes a second or two for windows to slowly paint in and draw one by
one. Moving windows around is quick, however.

 * CPU usage hovers around a constant 5% on both cores at all times
 * CPU usage jumps to 30% to 50% on both cores when switching workspaces
 * CPU usage jumps to 50% to 75% on both cores when moving windows and no other windows update while that window is being moved

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

- Binary package hint: xserver-xorg-video-intel
- 
  Binary package hint: xserver-xorg-video-intel
  
  Build Version/Date:
  
  Description:	Ubuntu jaunty (development branch)
  Release:	9.04
  Codename:	jaunty
  
  xserver-xorg-video-intel:
    Installed: 2:2.6.3-0ubuntu4
    Candidate: 2:2.6.3-0ubuntu4
    Version table:
   *** 2:2.6.3-0ubuntu4 0
          500 http://archive.ubuntu.com jaunty/main Packages
          100 /var/lib/dpkg/status
  
  
  Environment used for testing: 
  
  Mac mini Core Duo 1.66, 2 GB RAM, Intel GMA950 (dmesg reports as 945GM),
  20" DVI Cinema Display (1680x1050)
  
  Summary:
  
  X is painfully slow after upgrading from Intrepid to Jaunty. Performance
  and screen redraw on Intrepid was quick and clean.
  
  With Visual Effects enabled switching workspaces takes a couple seconds
  as the choppy animation jumps from one workspace to the next. Moving
  windows around with Wobbly Windows enabled again results in choppy
  animations as the window jumps around the screen.
  
  With Visual Effects disabled it becomes usable but is still much slower
  than Intrepid. Switching workspaces happens instantly however it then
  takes a second or two for windows to slowly paint in and draw one by
  one. Moving windows around is quick, however.
  
   * CPU usage hovers around a constant 5% on both cores at all times
   * CPU usage jumps to 30% to 50% on both cores when switching workspaces
   * CPU usage jumps to 50% to 75% on both cores when moving windows and no other windows update while that window is being moved

-- 
[i945/i950] X is painfully slow on Mac mini Core Duo 1.66 after upgrading from Intrepid to Jaunty
https://bugs.launchpad.net/bugs/353245
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