[Nouveau] [Bug 95520] New: Error when recovering from suspend mode: fifo: ce0 engine fault on channel 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95520

            Bug ID: 95520
           Summary: Error when recovering from suspend mode: fifo: ce0
                    engine fault on channel 0
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: bghome at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 123963
  --> https://bugs.freedesktop.org/attachment.cgi?id=123963&action=edit
Kernel log

Environment:
 - Linux kernel 4.5.4
 - Desktop environment: Gnome 3.20.2
 - Xorg 1.18.3
 - Graphics card: NVIDIA Corporation GK107GLM [Quadro K1000M] (rev a1)

Nouveau makes Xorg unresponsive after resuming from suspend to RAM. Restarting
Xorg did not help, but a reboot.

Error messages look like:
nouveau 0000:01:00.0: fifo: read fault at 0000dc8000 engine 15 [CE0] client 01
[CE0] reason 02 [PTE] on channel 0 [007fd56000 DRM]
nouveau 0000:01:00.0: fifo: ce0 engine fault on channel 0, recovering...

It must be a regression, because the issue did not happen with the same
hardware on kernel 4.4.x.

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