Red Hat Bugzilla – Bug 208931
sluggish response under high system load
Last modified: 2007-11-30 17:11:44 EST
Description of problem:
When compiz is enabled, and the cpu is pegged doing something (like parsing xml
on a yum update), the whole desktop interface slows to a crawl (mouse, moving
windows, dektop switching). Also, other apps slow down considerably (totem will
start to skip).
Version-Release number of selected component (if applicable):
X Window System Version 7.1.1
Build ID: xorg-x11-server 1.1.1-43.fc6
Steps to Reproduce:
1. Turn on "Desktop Effects"
2. Start a high cpu activity
3. Observe sluggish mouse
Slow response time for all actions
System load should not effect mouse or interface response.
This is on decently fast cpu, and a nvidia card (running the beta 9625 drivers).
My laptop (which has an integrated intel graphics chipset) doesn't have any
problems like this.
I realize this might just be the nvidia drivers causing trouble, but I figured I
should document it, because I know other people are having the same problem.
Yeah, this is a general problem, and is therefore really hard to fix in the
If you have specific workloads that cause unreasonable CPU usage by the X server
itself, please file those. But there's not much X can do if the kernel doesn't
give it enough CPU time.