[Nouveau] [Bug 99335] New: nouveau graphics often freezes when using KDE Plasma 5

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99335

            Bug ID: 99335
           Summary: nouveau graphics often freezes when using KDE Plasma 5
           Product: Mesa
           Version: 12.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: alexander.persh at gmail.com
        QA Contact: nouveau at lists.freedesktop.org

Created attachment 128839
  --> https://bugs.freedesktop.org/attachment.cgi?id=128839&action=edit
dmesg

Nouveau graphics on my system (Gentoo) often freezes with errors in dmesg. 

The system works fine for some time, but starts freezing at random intervals
(after 3 mins or 10 mins or 2 hours of work, etc) in random windows (chromium,
krusader, smplayer, login screen after auto-lock, etc) and a lot of artifacts
appear on the screen. After about 30 secs it freezes completely. My keyboard
does not react to any key combinations, mouse pointer moves with lags and mouse
buttons do not work so only hard reset helps.

For example, here are two photos of my frozen screen with artifacts:
http://i.imgur.com/vTbrNay.jpg
http://i.imgur.com/YIvEBGn.jpg

I wrote a script that saves dmesg to a file each 5 secs to get error logs.
Please find two examples with different errors attached.

I use the following versions of packages:
media-libs/mesa-12.0.1
x11-base/xorg-drivers-1.18-r1
x11-base/xorg-server-1.18.4
x11-drivers/xf86-video-nouveau-1.0.11
x11-libs/libdrm-2.4.70
sys-kernel/hardened-sources-4.7.10

My graphics card is Nvidia GeForce GTS 250 (G92 chip).

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