Nouveau - Oct 2016 - [Bug 98266] New: Geforce GTX 960: display corruption under KDE Plasma

https://bugs.freedesktop.org/show_bug.cgi?id=98266

            Bug ID: 98266
           Summary: Geforce GTX 960: display corruption under KDE Plasma
           Product: Mesa
           Version: 12.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: peter.eszlari at gmail.com
        QA Contact: nouveau at lists.freedesktop.org

Created attachment 127309
  --> https://bugs.freedesktop.org/attachment.cgi?id=127309&action=edit
nouveau GTX960 corruption under KDE Plasma

The selection of menu items gets corrupted under KDE Plasma 5.7 with a Geforce
GTX 960 and the nouveau driver. When I turn off compositing or use the Nvidia
binary driver, these corruptions are gone.

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
What Xorg and kernel versions are you using?

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--- Comment #2 from peter.eszlari at gmail.com ---
I'm running on Kubuntu 16.10 with Xorg 1.18.4 and kernel 4.8.0.

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--- Comment #3 from Pablo Cholaky <waltercool at slash.cl> ---
I think this is related with all Maxwell2 cards. I have a 980m, and I also have
a lot of artifacts on screen, and the mouse have a weird delay.

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--- Comment #4 from Pablo Cholaky <waltercool at slash.cl> ---
(In reply to Pablo Cholaky from comment #3)
> I think this is related with all Maxwell2 cards. I have a 980m, and I also
> have a lot of artifacts on screen, and the mouse have a weird delay.
My bad, I meant a weird UI refresh delay for mouse.

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--- Comment #5 from Ilia Mirkin <imirkin at alum.mit.edu> ---
I just published some patches that allow you to use xf86-video-nouveau instead
of modesetting for GM20x GPUs. Can you see if using it improves the situation
at all? You can build it from

https://github.com/imirkin/xf86-video-nouveau

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peter.eszlari at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from peter.eszlari at gmail.com ---
(In reply to Ilia Mirkin from comment #5)
> I just published some patches that allow you to use xf86-video-nouveau
> instead of modesetting for GM20x GPUs. Can you see if using it improves the
> situation at all? You can build it from
> 
> https://github.com/imirkin/xf86-video-nouveau
This fixes the bug. But from Xorg.log it looks like I was already running
nouveau before.

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