I have a strange problem since I upgraded to KDE4.4.0:

If I do nothing for about 10 min, the xorg process starts eating about 100% CPU. As soon as I press a key or move the mouse everything is going back to normal.

I'm using openSuse 11.2 (Xorg 7.4).

Any ideas i can try are welcome.

Some more information that might help:

This problem may be related to plasma. As soon as I press a button, CPU usage of Xorg goes down and plasma-desktop is doing something for a few seconds.

Are there any plasmoids which can cause this problem?
The only ones I use which are not standard are CWP and Qalculate.

Any ideas how I can find out what can cause this problem?

maybe some kind of screensaver is triggering? or you're using some highly animated plasmoids? (like bubblemon)

I do face the same issue but i am using simple clock screensaver only. Any ideas?

Are you using Nvidia's card? if so please add the following line in section "Device" in /etc/X11/xorg.conf file.

Option "UseEvents" "on"

and probably reboot.

sojin wrote:Are you using Nvidia's card? if so please add the following line in section "Device" in /etc/X11/xorg.conf file.

Option "UseEvents" "on"

and probably reboot.

May i ask what does this do?

http://us.download.nvidia.com/XFree86/L ... dix-d.html

see option userevents,

The additional Option "UseEvents" "true"
I far as I understand, causes the x driver to use poll() which is a less cpu consumer. See if this change causes any flickering (might be due to higher poll() interval) then rollback.

thanks, will monitor it

I'm on it. It's not screensaver or plasmoid-related.

See https://bugzilla.novell.com/show_bug.cgi?id=584919

At the moment we think it is the SYNC X extension. You can try disabling it in xorg.conf, while we test some patches to Xorg.

thanks mate