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[Bug 969860] Re: fglrx uses 100% CPU when screen turns off (spinning in glXWaitVideoSyncSGI or glXSwapBuffers)

 

I had the same problem for a while now, until recently I found a
solution which I'm going to share with you. I know it's not the ideal
approach, but I hope it will be useful for you guys until someone fixes
the issue.

Investigating I found that installing Caffeine in my Ubuntu 12.04.1 and
checking the "Disable Screensaver" option fixed the problem for me. I
also checked the option "Start Caffeine on login" at the Caffeine
Preference's window, although the "Disable Screensaver" is not a
persistent option and each time I log in I have to check this option
again.

With this software installed and enabled, my CPU is now always low and
the computer is quiet... the only drawback is that the screen never goes
blank and I have to turn off the monitor attached to my laptop manually,
but for me it's not really a problem and I much prefer this to finding
my laptop hot when I come back after leaving it for 15 minutes.

This is the Caffeine file which I have installed:
https://launchpad.net/~caffeine-developers/+archive/ppa/+files/caffeine_2.4.1%2B464~precise1_all.deb

It's also available for other Ubuntu versions as well:
https://launchpad.net/~caffeine-developers/+archive/ppa/+packages

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https://bugs.launchpad.net/bugs/969860

Title:
  fglrx uses 100% CPU when screen turns off (spinning in
  glXWaitVideoSyncSGI or glXSwapBuffers)

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