[Nouveau] [Bug 87934] New: nouveau errors on archlinux while running War Thunder native (not via steam)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87934

            Bug ID: 87934
           Summary: nouveau errors on archlinux while running War Thunder
                    native (not via steam)
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: elia.shreidler at gmail.com

Created attachment 111608
  --> https://bugs.freedesktop.org/attachment.cgi?id=111608&action=edit
dmesg dump

while executing: War Thunder (PC game) on Arch linux - 

$ uname -a
Linux *** 3.17.6-1-ARCH #1 SMP PREEMPT Sun Dec 7 23:43:32 UTC 2014 x86_64
GNU/Linux

with gnome 3.14 - 
$ gnome-shell --version
GNOME Shell 3.14.3

the game crashed (back to gnome) and I saw many nouveau errors in dmesg,
like:

$ less /tmp/kernel_log.txt
[15082.709700] nouveau E[aces[7473]] push 1 buffer not in list
[15083.028540] nouveau E[aces[7473]] Unknown handle 0x000000be
[15083.028544] nouveau E[aces[7473]] validate_init
[15083.028545] nouveau E[aces[7473]] validate: -2
[15459.888435] nouveau E[  PGRAPH][0000:06:00.0] DATA_ERROR [INVALID_BITFIELD]
ch 7 [0x003f97b000 aces[7473]] subc 0 class 0x9097 mthd 0x1b00 data 0x200308e0
[15459.888467] nouveau E[  PGRAPH][0000:06:00.0] DATA_ERROR [INVALID_BITFIELD]
ch 7 [0x003f97b000 aces[7473]] subc 0 class 0x9097 mthd 0x1b0c data 0x003a0000
[15459.916871] nouveau E[aces[7473]] push 1 buffer not in list
[15459.917151] nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ILLEGAL_MTHD
[15459.917157] nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ch 7 [aces[7473]] subc
0 mthd 0x000c data 0x39888889
[15459.917176] nouveau E[   PFIFO][0000:06:00.0] PBDMA0: (unknown bits
0x02000000)
[15459.917179] nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ch 7 [aces[7473]] subc
0 mthd 0x0020 data 0x00000200
[15459.917200] nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ILLEGAL_MTHD
[15459.917203] nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ch 7 [aces[7473]] subc
0 mthd 0x0030 data 0x00000000
[15459.917222] nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ILLEGAL_MTHD

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