Bug 354247 - Screen artifacts
Summary: Screen artifacts
Status: RESOLVED WORKSFORME
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: 5.4.2
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-10-23 11:12 UTC by Nikola Schnelle
Modified: 2016-10-28 19:56 UTC (History)
0 users

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Description Nikola Schnelle 2015-10-23 11:12:07 UTC 
I get screen artifacts in Plasma 5 at random. It happens on laptops with haswell and broadwell gpus. When compositing type is changed, artifacts disappear. 

This is easily reproducible in Kubuntu 14.10.

Reproducible: Always

Steps to Reproduce:
1. In Kubuntu 14.10 (or live session) go to System settings>Fonts
2. Enable anti-aliasing (additionally, you can set RGB and slight hinting)
3. Artifacts start "dancing" on the screen. They are easily seen with Present windows effect.
Comment 1 Martin Flöser 2015-10-23 11:15:42 UTC 
Can you please clarify: are you really using Kubuntu 14.10?
Comment 2 Thomas Lübking 2015-10-23 14:31:21 UTC 
In addition please provide:

1. Screenshots (video?)
2. qdbus org.kde.KWin /KWin supportInformation
3. /var/log/Xorg.0.log
Comment 3 Martin Flöser 2016-10-28 19:02:52 UTC 
Waiting for the replies to comment #1 and comment #2.
Comment 4 Nikola Schnelle 2016-10-28 19:09:18 UTC 
Martin, I cannot reproduce the bug anymore on Neon user edition.
Comment 5 Martin Flöser 2016-10-28 19:44:17 UTC 
Thanks for the feedback and I'm glad that this problem is gone. I guess it's the switch to modesettings driver in X ;-). Setting to worksforme.
Comment 6 Nikola Schnelle 2016-10-28 19:56:07 UTC 
(In reply to Martin Gräßlin from comment #5)
> I guess it's the switch to modesettings driver in X ;-)

Yea probably. Flashing/flickering system tray is also gone with switch to modesettings driver.