Bug 169745

Summary:	Artifacts with desktop effects and direct rendering
Product:	[Plasma] kwin	Reporter:	Salvatore <toresoft>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Salvatore 2008-08-24 22:01:27 UTC

Version:            (using KDE 4.1.0)
OS:                Linux
Installed from:    SuSE RPMs

Enabling desktop effects with the direct rendering option causes kwin to show artifacts while whole windows (or parts of them) are redrawn.

These artifacts appear as lines of pixels bordering the area redrawn by kwin. This happens also with plasma objects. By disabling direct rendering thse artifacts disappear.  

Bug reproduction steps:
1) Enable desktop effects, opengl and direct rendering (other options do not affect this bug)
2) Open 2 random windows and slightly overlap them
3) Minimize and maximize several times the foreground window

This behaviour has been observed on opensuse 11.0 and kubuntu 8.10 alpha 4, kde 4.1, and an nvidia geforce 7600gs (driver 173.14 on opensuse, 177.68 on kubuntu).

I attach 3 screenshots, in the third one you can see whole parts of a previously minimized window, this is not what i did see on the screen.

http://i35.tinypic.com/2lsyw3t.jpg

http://i34.tinypic.com/e9djzo.jpg

http://i34.tinypic.com/qz1w6q.jpg

Comment 1 lucas 2008-08-25 06:23:25 UTC

Which effects do you have enabled? I can only reproduce with the blur effect.

Comment 2 Salvatore 2008-08-25 16:12:11 UTC

(In reply to comment #1)
> Which effects do you have enabled? I can only reproduce with the blur effect.
> 

You are right, the bug happens only when that plugin is enabled, i didn't think to it.

Comment 3 lucas 2008-08-25 16:33:52 UTC


*** This bug has been marked as a duplicate of bug 158255 ***