Bug 377109

Summary: Blur intermediate results does not work on Wayland
Product: [Plasma] kwin Reporter: tromzy
Component: effects-variousAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED FIXED    
Severity: normal Flags: mgraesslin: Wayland+
Priority: NOR    
Version: 5.9.3   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: Picture of the bad background, especially visible in the part in red
attachment-23683-0.html

Description tromzy 2017-03-02 14:55:24 UTC
Created attachment 104320 [details]
Picture of the bad background, especially visible in the part in red

OK this one is hard to explain : on Wayland, the Plasma panels (especially visible on the calendar) don't show what's behind them ; isntead, they display... I don't know what. See the attached picture I took, but I don't know if it's very clear ; I put a red square around what's wrong. The background should not be this ; instead, it seems like the ghost of a previous background or something.
Comment 1 tromzy 2017-03-02 14:58:11 UTC
I noticed the bug after I played Kpatience fullscreen ; after I quit the game, the calendar background (as in the attachment) still displayed some cards.
Comment 2 Martin Flöser 2017-03-02 19:22:43 UTC
what are your blur settings?
Comment 3 tromzy 2017-03-02 20:43:22 UTC
I can't tell you right now because the bug occurs on my work computer, and I'm at home now (I'll tell you tomorrow). But, on my home computer on Wayland, the bug does not seem to happen, and the blur settings on this computer are : half-ticked blur option, strong effect strenght, and "Intermediate results" is ticked. And it seems to work this way.
Comment 4 tromzy 2017-03-03 08:41:45 UTC
OK, so, my blur settings are exactly the same on my work computer than on my home computer ; yet, the glitch is there.

Half-ticked blur option, strong effect strenght, and "Intermediate results" is ticked.
Comment 5 tromzy 2017-03-03 08:59:14 UTC
Unticking "Intermediate results" fixes the bug (at least for now).
Comment 6 Martin Flöser 2017-03-03 16:29:02 UTC
Created attachment 104343 [details]
attachment-23683-0.html

Good. That's what I wanted to ask next.
Comment 7 Martin Flöser 2018-01-28 09:43:06 UTC
The option does not exist in the new blur effect any more (5.13) and for 5.12 the config option got removed.