High CPU usage by Xorg process when scrolling in firefox or adobe reader or in any other application

[Ankit Bansal]

Binary package hint: xorg

When i start firefox or adobe reader to read some file or URL, the Xorg process usage goes as high as 100 % and the scrolling makes the screen to flicker. The /var/log/Xorg.0.log.old shows the stack trace. glxinfo command also does not work.

output of glxinfo from command line is as follows:
ankit@ankit-laptop:~$ glxinfo
name of display: :0.0
X Error of failed request: BadRequest (invalid request code or no such operation)
  Major opcode of failed request: 155 (GLX)
  Minor opcode of failed request: 19 (X_GLXQueryServerString)
  Serial number of failed request: 15
  Current serial number in output stream: 15

ankit@ankit-laptop:~$ lspci | grep VGA
01:00.0 VGA compatible controller: ATI Technologies Inc M96 [Mobility Radeon HD 4650]

[Ankit Bansal (ankitbansal-nitj)]

please have a look at the https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/713643 for more details.

[Bryce Harrington (bryce)]

Sounds more like a client issue.