Nouveau - Sep 2015 - [Bug 91988] New: nouveau causes complete system hang - SCHED_ERROR CTXSW_TIMEOUT PGRAPH engine fault PBDMA0 ACQUIRE

https://bugs.freedesktop.org/show_bug.cgi?id=91988

            Bug ID: 91988
           Summary: nouveau causes complete system hang - SCHED_ERROR
                    CTXSW_TIMEOUT PGRAPH engine fault PBDMA0 ACQUIRE
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: jamespharvey20 at gmail.com
        QA Contact: xorg-team at lists.x.org

I experience a complete lockup every 1-3 days, except the mouse cursor still
moves.  Keyboard LED's don't flash.  Num/Caps/Scroll Lock doesn't
toggle the
keyboard LED's.  Can't switch to text tty's.  Can't ping its IP
or ssh into
from another machine.  Proprietary nVidia driver works fine.  This has been
happening since I switched to nouveau a few months ago.

JOURNALCTL SHOWS (VIEWABLE AFTER REBOOT)
Sep 12 08:45:39 kvm kernel: nouveau E[   PFIFO][0000:06:00.0] SCHED_ERROR [
CTXSW_TIMEOUT ]
Sep 12 08:45:39 kvm kernel: nouveau E[   PFIFO][0000:06:00.0] PGRAPH engine
fault on channel 7, recovering...
Sep 12 09:22:18 kvm kernel: nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ACQUIRE
Sep 12 09:22:18 kvm kernel: nouveau E[   PFIFO][0000:06:00.0] PBDMA0: ch 2
[Xorg[655]] subc 0 mthd 0x001c data 0x00001004
{{{ then the last 2 lines repeat for about 50 lines, the nothing more is logged
until the reboot }}}

SYSTEM NOTES
microcode: Microcode Update Driver: v2.00 <tigran at
aivazian.fsnet.co.uk>, Peter
Oruba
No overclocking
Inside thoroughly vacuumed regularly, no dust blocking heatsink, all
temperatures in good range
lspci -k viewable here: http://pastebin.ca/3160329
lsusb viewable here: http://pastebin.ca/3160278
lsusb -t viewable here: http://pastebin.ca/3160279
Single hard drive, passes extensive testing, btrfs
Most recent motherboard BIOS - MSI X99S SLI PLUS (1.8 3/20/2015)
Most recent VGA BIOS - XFX nVidia GeForce GT 640 2GB (7/14/2012)

SYSTEM SPECIFICATIONS
DMI: MSI MS-7885/X99S SLI PLUS (MS-7885), BIOS 1.80 03/20/2015
Haswell-E -- smpboot: CPU0: Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz (fam: 06,
model: 3f, stepping: 02)
Linux version 4.1.6-1-ARCH (builduser at tobias) (gcc version 5.2.0 (GCC) ) #1
SMP
PREEMPT Mon Aug 17 08:52:28 CEST 2015
Memory: 32840088K/33447336K available (5699K kernel code, 893K rwdata, 1732K
rodata, 1180K init, 1152K bss, 607248K reserved, 0K cma-reserved)
06:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GT 640]
(rev a1)
Model=TOSHIBA MD04ACA500, FwRev=FP2A --- Plugged into motherboard SATA, no SATA
controllers
KDE plasma-desktop/workspace 5.4.1-2
nouveau driver 1.0.11-3

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https://bugs.freedesktop.org/show_bug.cgi?id=91988

Franco Forza <ucx at gmx.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=93629

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https://bugs.freedesktop.org/show_bug.cgi?id=91988

Martin Peres <martin.peres at free.fr> changed:

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

--- Comment #1 from Martin Peres <martin.peres at free.fr> ---
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