X uses 100% CPU - have to restart Kwin

**newlinux** · March 3rd, 2009

I have recently switched to using KDE again on one of my computers, but there is annoying bug.

Anytime the machine has been left alone for a little bit (possibly when the screensaver is supposed to activate or when the monitor is put to sleep, havin't verified this is when it happens yet) X takes up 100% of one of my CPU cores and the desktop is basically frozen (kwin is frozen). The only ways out are to restart Kwin or X.

Any ideas on how to fix this?

This is on 8.04...

**newlinux** · March 4th, 2009

bump

**Crafty Kisses** · March 5th, 2009

A couple of questions here, how much RAM do you have? Have you checked the top output and see if X is actually using 100%? Post the results of this command:

Code:

top

**newlinux** · March 5th, 2009

Originally Posted by Codename

A couple of questions here, how much RAM do you have? Have you checked the top output and see if X is actually using 100%? Post the results of this command:

Code:

top

I am sure that it is using 100% of 1 core. I use htop. Top doesn't show the separate cores, which is why I prefer htop. I've got a gig of RAM, so I doubt that's the issue. I've used machines with way less CPU and RAM with KDE without a problem.

**newlinux** · March 5th, 2009

More info, this is the E2180 machine in signature... Uses an integrated intel GMA3100 GPU (intel driver), 1GB PC5400

**newlinux** · March 6th, 2009

It also doesn't occur when I just leave the screen on KDM, or when I am consistently using the machine. Only if I leave it idle for a few minutes.

**newlinux** · March 9th, 2009

bump any ideas? I've seen some bugs, but they seem to deal with various options within KDE, which I think I have disabled... not sure - I'm not extremely experienced with KDE.

**newlinux** · March 12th, 2009

Still at a loss here... Done some more investigating, but still haven't turned up anything. It's gotta be something kwin is doing, because restarting it fixes the problem temporarily. I've been playing with various KDE configs, but to no avail.