[Nouveau] [Bug 105260] New: Nouveau frequently crashes when hovering over taskbar in KDE Plasma 5

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105260

            Bug ID: 105260
           Summary: Nouveau frequently crashes when hovering over taskbar
                    in KDE Plasma 5
           Product: Mesa
           Version: 13.0
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: zeratul976 at hotmail.com
        QA Contact: nouveau at lists.freedesktop.org

I am experiencing a frequent freeze of my entire graphics session, from which I
can only recover by restarting by display manager.

The freeze always occurs when hovering over a taskbar entry and a thumbnail
image of the corresponding window is shown, although I can't reliably reproduce
the freeze every time I perform such a hover.

The following output appears in dmesg whenever this happens:

[425014.691684] nouveau 0000:01:00.0: gr: TRAP ch 2 [003fc60000 Xorg[16428]]
[425014.691694] nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 80000049
[425014.691697] nouveau 0000:01:00.0: gr: GPC0/TPC1/TEX: 80000049
[425014.691715] nouveau 0000:01:00.0: fifo: read fault at 0002b70000 engine 00
[PGRAPH] client 01 [GPC0/TEX] reason 02 [PAGE_NOT_PRESENT] on channel 2
[003fc60000 Xorg[16428]]
[425014.691716] nouveau 0000:01:00.0: fifo: gr engine fault on channel 2,
recovering...
[425014.691911] nouveau 0000:01:00.0: Xorg[16428]: channel 2 killed!
[425014.692071] nouveau 0000:01:00.0: gr: TRAP ch 9 [003f93c000
plasmashell[16602]]
[425014.692080] nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 80000049
[425014.692083] nouveau 0000:01:00.0: gr: GPC0/TPC1/TEX: 80000049
[425014.692092] nouveau 0000:01:00.0: fifo: read fault at 0001500000 engine 00
[PGRAPH] client 01 [GPC0/TEX] reason 02 [PAGE_NOT_PRESENT] on channel 9
[003f93c000 plasmashell[16602]]
[425014.692094] nouveau 0000:01:00.0: fifo: gr engine fault on channel 9,
recovering...
[425014.692301] nouveau 0000:01:00.0: plasmashell[16602]: channel 9 killed!

I am running Debian 9, with the KDE desktop environment (Plasma 5.8). My kernel
version is 4.14.

Please let me know if there is any other information I can provide to help
diagnose the issue.

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