Bug 186192

Summary:	Wobbly windows high cpu usage
Product:	[Plasma] kwin	Reporter:	Yves Glodt <yg>
Component:	effects-various	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	lemma
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Screenshot of problem

Description Yves Glodt 2009-03-05 09:58:19 UTC

Version:           4.2.1 (using KDE 4.2.0)
OS:                Linux
Installed from:    Ubuntu Packages

I have set up the Translucency effect to make the windows a bit translucent while they are moved, this is hot, especially in combination with wobbly windows.

Now my complain: :-)

With this setup, just clicking the title-bar of the window, without actually moving it, makes cpu usage of kwin and xorg go high!

(To about 60-70% on a 3 year old laptop with free ati driver on jaunty, and to about 40% on a 2 month old laptop with fglrx on intrepid)

Comment 1 Yves Glodt 2009-03-05 09:59:20 UTC

Created attachment 31791 [details]
Screenshot of problem

While taking this screenshot I was actually just clicking and holding the click of the dolphin title-bar.

Comment 2 lucas 2009-03-05 10:54:23 UTC

Problem is actually caused by wobbly windows and it's the common repaint-loop bug. Having translucent windows enabled or disabled doesn't change anything.

Comment 3 Yves Glodt 2009-03-05 11:17:42 UTC

Indeed, I just tried to deactivate wobbly and the phenomenon disappears.

Comment 4 Michael Leupold 2010-10-10 18:35:01 UTC

Not specific to ATI drivers actually. I can reproduce using my GeForce as well (on trunk r1184315).

Comment 5 Martin Flöser 2011-03-09 20:22:02 UTC

situation should have improved with 4.6, but root cause is bug #189999 - therefore duplicate

*** This bug has been marked as a duplicate of bug 189999 ***