[Nouveau] [Bug 93629] [NVE6] complete system freeze, PGRAPH engine fault on channel 2, SCHED_ERROR [ CTXSW_TIMEOUT ]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93629

--- Comment #18 from Alexandre Courbot <gnurou at gmail.com> ---
Compiled and booted a 3.10 kernel in order to attempt a bisect, but the issue
showed up on that version as well:

[   95.424646] nouveau E[  PGRAPH][0000:01:00.0] GPC ch 7 [0x000027f563
Xorg[1698]]:
[   95.424659] nouveau E[  PGRAPH][0000:01:00.0] GPC0/TP0/MP trap:
INVALID_OPCODE
[   95.424671] nouveau E[  PGRAPH][0000:01:00.0] GPC2/TP0/MP trap:
INVALID_OPCODE
[   95.424805] nouveau E[  PGRAPH][0000:01:00.0] GPC ch 7 [0x000027f563
Xorg[1698]]:
[   95.424813] nouveau E[  PGRAPH][0000:01:00.0] GPC1/TP0/MP trap:
INVALID_OPCODE
[   95.424826] nouveau E[  PGRAPH][0000:01:00.0] GPC2/TP1/MP trap:
INVALID_OPCODE
[   99.750909] nouveau W[   PFIFO][0000:01:00.0] unknown status 0x00000100
[  102.082998] nouveau E[  PGRAPH][0000:01:00.0] ROP0 ch 5 [0x000027f71f
Xorg[1698]] 0x80000000 0x80000001
[  102.083000] nouveau E[  PGRAPH][0000:01:00.0] ROP1 ch 5 [0x000027f71f
Xorg[1698]] 0x80000000 0x80000001
[  102.083000] nouveau E[  PGRAPH][0000:01:00.0] ROP2 ch 5 [0x000027f71f
Xorg[1698]] 0x80000000 0x80000001
[  104.045757] nouveau W[   PFIFO][0000:01:00.0] unknown status 0x00000100
[  108.340607] nouveau W[   PFIFO][0000:01:00.0] unknown status 0x00000100

Using the external firmware, I cannot reproduce the problem on this kernel
either. So it seems like the NVE6 firmware has a long-standing bug.

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