Bug 255779

Summary:	Present windows slows desktop down
Product:	[Plasma] kwin	Reporter:	Ralph Müller-Welt <ralph>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Ralph Müller-Welt 2010-11-01 01:34:57 UTC

Version:           unspecified (using KDE 4.5.2) 
OS:                Linux

Distro: Kubuntu 10.10
KDE: 4.5.2
GFX: GeForce FX 5700/AGP/SSE2
Driver: NVIDIA 173.14.28

Issue:
When using present windows (CTRL+F10) i get no preview windows, only window names. After present windows Desktop is extremely slow!
Other effects (still) work fine (desktop cube, Desktop grid, etc).

Work around:
Don't use present windows ;-(
Or if system is already slow, toggle desktop effects off and on again.

History:
I never had anything like that before!
Issue appeared after upgrade kubuntu 10.04 -> 10.10 with nouveau (no 3d) -> NV 173.14.28.



Reproducible: Always

Comment 1 Thomas Lübking 2010-11-01 16:15:51 UTC

see the dupe. you'll have to append the output of 

   echo "NVIDIA=`glxinfo | grep 'OpenGL renderer string' | sed -e 's/^.*: //'`:-:`glxinfo | grep 'OpenGL version string' | sed -e 's/^.*: //'`"

to the  [Blacklist][Lanczos] section of your ~/.kde/share/config/kwinrc

*** This bug has been marked as a duplicate of bug 243181 ***

Comment 2 Ralph Müller-Welt 2010-11-02 14:13:26 UTC

THX,
adding 

NVIDIA=GeForce FX 5700/AGP/SSE2:-:2.1.2 NVIDIA 173.14.28

to [Blacklist][Lanczos] section of ~/.kde/share/config/kwinrc

Solved the issue.