Bug 291033 - High xorg CPU usage when switch screen OFF
Summary: High xorg CPU usage when switch screen OFF
Status: RESOLVED FIXED
Alias: None
Product: krandr
Classification: Miscellaneous
Component: general (show other bugs)
Version: 4.7
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Gustavo Pichorim Boiko
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-01-09 08:57 UTC by parcours.lingual
Modified: 2012-07-04 07:53 UTC (History)
2 users (show)

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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.