Bug 328951

Summary: Save intermediate rendering results in Blur effect produces garbage in fade effect
Product: [Plasma] kwin Reporter: Martin Flöser <mgraesslin>
Component: effects-variousAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: normal    
Priority: NOR    
Version: 4.11.4   
Target Milestone: ---   
Platform: Debian testing   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: Video illustrating the problem with Systemsettings tooltips

Description Martin Flöser 2013-12-18 07:18:45 UTC
Created attachment 84150 [details]
Video illustrating the problem with Systemsettings tooltips

When using save intermediate rendering results in Blur effect one can observer rendering problems during the fade out of blurred windows.

Steps to reproduce:
1. Set animation speed to very slow to properly observe
2. Enable blur with save intermediate rendering results
3. Open Systemsettings
4. move the mouse around to show and hide tooltips

Expected Results:
Normal fade in and fade out

Actual Results:
Ugly tearing effects. See attached video. The video doesn't capture the complete tooltips. Please ignore the cut-off part. The parts of the tooltips which are captured show the problem.

Workaround:
Disable save intermediate rendering results in blur effect

The problem is both present in 4.11 branch and master branch. The video is recorded with 4.11 branch.
Comment 1 Thomas Lübking 2013-12-18 12:11:20 UTC
bug #307112 ?
Comment 2 Martin Flöser 2013-12-18 13:47:11 UTC
This is embarrassing, I commented on the bug. Yes I think it's the same issue.

*** This bug has been marked as a duplicate of bug 307112 ***