Tuesday, March 25, 2008

X hangs on Ubuntu (gutsy) with latest Ati-fglrx driver


  • X takes 100% cpu after a certain period of inactivity
  • mouse cursor moves, but doesn't respond to any clicks
  • ctrl+alt+shift+F1 occassionally works (not always)
I started having this problem after installing the latest ati-fglrx driver.
My fglrx output:

OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI MOBILITY RADEON X300
OpenGL version string: 2.1.7412 Release

Browsed a thousands of forum entries, tried a zillion of solutions. Finally this is what seemed to have fixed the problem for me:

vim /etc/default/acpi-support

# Should we save and restore state using the VESA BIOS Extensions?

# Should we attempt to warm-boot the video hardware on resume?

also check http://babilonline.blogspot.com/2008/03/unbuntu-ati-proprietary-fglrx-driver.html