| Summary: | Mesa has to be downgraded to version 8 with KDE | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | T.Kijas <t.kijas> |
| Component: | Drivers/DRI/i965 | Assignee: | Ian Romanick <idr> |
| Status: | RESOLVED DUPLICATE | QA Contact: | Intel 3D Bugs Mailing List <intel-3d-bugs> |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | 10.1 | ||
| Hardware: | x86-64 (AMD64) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | Screenshot of white stripes in KDE with mesa >8 | ||
Thanks for the information! Having to downgrade all the way to Mesa 8 strongly suggests multisampling is at fault.
Although we suspect multisampling is broken, KWin and Unity really don't want to be using multisampling. The reason they're getting MSAA is due to a GLX bug in the X server, which chooses random visuals/fbconfigs that sometimes have really undesirable properties. This is fixed in X server 1.15.1 and 1.14.6.
As an alternative, you can try running KWin with EGL:
KWIN_OPENGL_INTERFACE=egl kwin --replace &
*** This bug has been marked as a duplicate of bug 77207 ***
Well I do not think it is the duplicate, because what you adviced me did NOT help.
I tried...
KWIN_OPENGL_INTERFACE=egl kwin --replace &
....
tom@tomas-Lenovo-C440:~$ KWIN_OPENGL_INTERFACE=egl kwin --replace &
[1] 16071
tom@tomas-Lenovo-C440:~$ QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Desktop
OpenGL version string: 3.0 Mesa 9.2.1
OpenGL shading language version string: 1.30
Driver: Intel
GPU class: Unknown
OpenGL version: 3.0
GLSL version: 1.30
Mesa version: 9.2.1
X server version: 1.14.5
Linux kernel version: 3.11
Direct rendering: yes
Requires strict binding: yes
GLSL shaders: yes
Texture NPOT support: yes
And it still show the white corruptions.
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Created attachment 97159 [details] Screenshot of white stripes in KDE with mesa >8 On computers with INTEL video card (Ivy bridge), Ubuntu 12.04.4 (KDE4.8) and 14.04 (KDE4.11.x?) I can see graphical corruption: white stripes, 3D games like HeroesOfNewerth have graphical corruptions too. Sometimes it scramble even cursor of mouse. The problem probably is not in KDE, because Unity has some problems too. I tried to downgrade the mesa in 12.04 to MESA 8 and it resolved it. But in Ubuntu 14.04 I cannot do that. Reproducible: Always Steps to Reproduce: 1. Install Ubuntu 12.04.4 (with mesa 9) or 14.04 (with mesa 10.1) 2. Install KDE 3. Use KDE and look at white-stripped graphical corruption and in-games graphical corruption. Actual Results: You can see white stripes corruption in KDE and strange rectangular corruption in 3D games.