Bug 291033

Summary:	High xorg CPU usage when switch screen OFF
Product:	[Unmaintained] krandr	Reporter:	parcours.lingual
Component:	general	Assignee:	Gustavo Pichorim Boiko <gustavo.boiko>
Status:	RESOLVED FIXED
Severity:	normal	CC:	jsardid, lamarque
Priority:	NOR
Version First Reported In:	4.7
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description parcours.lingual 2012-01-09 08:57:42 UTC

Version:           4.7 (using KDE 4.7.4) 
OS:                Linux

Hello

Xorg CPU usage is really high when i switch the screen OFF with media keys (Fn+F6) and the mouse becomes really slow for about 5-10 seconds.

On KDE forums, with the help of forum moderator, we have managed to narrow the problem down to kded4, more specifically - Display Management change monitor. When i turn this service down everything works fine.

Here is my link to forum post:
http://forum.kde.org/viewtopic.php?f=107&t=98394

Xorg.0.log:
http://dl.dropbox.com/u/38176672/Xorg.0.log%28kde%29

My laptop specs:
I have Archlinux, KDE 4.7. My laptop is:
Asus k50ij
intel gma 4500m integrated
2gb ram
dual-core cpu t3000


Reproducible: Always

Steps to Reproduce:
Press Fn+F6 (to switch the screen OFF).

Actual Results:  
High XORG CPU usage, mouse is slow for about 5-10 seconds.

Expected Results:  
Lower CPU usage, cursor should move normally.

Comment 1 avlas 2012-01-16 02:30:40 UTC

I can confirm the symptoms in Kubuntu 11.10 with KDE 4.8 RC. This is a Lenovo Thinkpad T420 and the shorcut is Fn+F7

Comment 2 parcours.lingual 2012-07-04 07:53:00 UTC

Problem solved with KDE 4.8.4.