Weird artefacts on screen (white traces, white boxes around windows)

[cagara]

Sometimes when changing the focus between windows a bunch of odd artefacts occur on the screen. Most likely white trails appear on top of the screen or across the firefox toolbar, or big white boxes appear around a window.

Those artefacts have in common that they dissapear the moment i change the focus to another window.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: plasma-desktop 4:4.9.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-11.11-generic 3.5.2
Uname: Linux 3.5.0-11-generic x86_64
ApportVersion: 2.5.1-0ubuntu2
Architecture: amd64
Date: Sun Aug 26 09:49:11 2012
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120824)
ProcEnviron:
 LANGUAGE=
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: kde-workspace
UpgradeStatus: No upgrade log present (probably fresh install)

[cagara (cagara)]

Here another variant of the artefacts. Most probably location of appearence: Firefox toolbar, upper screen edge, Kicker Menu?field.comment=Here another variant of the artefacts. Most probably location of appearence: Firefox toolbar, upper screen edge, Kicker Menu?field.comment=Here another variant of the artefacts. Most probably location of appearence: Firefox toolbar, upper screen edge, Kicker Menu?field.comment=Here another variant of the artefacts. Most probably location of appearence: Firefox toolbar, upper screen edge, Kicker Menu

[cagara (cagara)]

Addition: When changing from OpenGL backend to XRender in the desktop effects settings, the problem seems to be gone.

[Edward Donovan (edward.donovan)]

This looks a lot like video artifacts reported by Shahar, in bug 1041752. cagara, take a look at the video he posted, if you can. You can evaluate whether it looks like related symptoms, with the newest Mesa. I'm going to mark them together, for now. Thanks!

[cagara (cagara)]

Hi Edward, unfortunately my "artefacts" are of different nature:

They are not occuring when moving a window. They just pop up and are static until i change the focus of a window. They definitely do not occur when moving around a window.

[Shahar Or (mightyiam)]

Yes, I agree, that these don't look quite like my corruptions.

[Edward Donovan (edward.donovan)]

Mm, wishful thinking on my part, then. Thank you both for investigating it. So far my Intel ivy bridge video hasn't shown anything like this, so I can't add much, myself. Thanks.

[cagara (cagara)]

Edward, my hardware is the new Thinkpad X230.

Additionally i have configured several theming options. I remember he error did not occur in the standard theme.

Desktop Theme: Oxygen
Colors: Krita-Dark

You will have to use the system for a while as the error does not always occur. Maybe 10 minutes excessive window opening/closing/moving incl. browsing the web should be enough to trigger the trails. :-)

[Edward Donovan (edward.donovan)]

Hey cagara - I'm using unity with the default theme, and haven't had time to try testing with your packages. But here is another thought (if you are still experiencing the bug).

A lot of people had graphical corruption when Mesa 9.0 arrived. The people on bug 1042211 have intel video (Shahar's report was duped to that), and are using unity. Their problems have improved. You've got kwin, not compiz, and I guess you have nvidia hardware on that laptop. But you might ask on that bug, there were a number of knowledgeable developers there. Good luck!

[penalvch (penalvch)]

cagara, as per https://wiki.ubuntu.com/Releases, Ubuntu 12.10 reached EOL on May 16, 2014.

Is this reproducible on a supported release?

[Launchpad Janitor (janitor)]

[Expired for mesa (Ubuntu) because there has been no activity for 60 days.]