Nouveau - Nov 2016 - [Bug 98712] New: [PPC64] GPU Lock Up when Nouveau 2D acceleration is enabled + X failures

https://bugs.freedesktop.org/show_bug.cgi?id=98712

            Bug ID: 98712
           Summary: [PPC64] GPU Lock Up when Nouveau 2D acceleration is
                    enabled + X failures
           Product: xorg
           Version: 7.7 (2012.06)
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: jeffbai at aosc.xyz
        QA Contact: xorg-team at lists.x.org

Created attachment 127956
  --> https://bugs.freedesktop.org/attachment.cgi?id=127956&action=edit
dmesg without nouveau.noaccel=1

Happened to get 2 FX4500's for my PowerMac G5 11,2, but it didn't seem
willing
to cooperate.

Without nouveau.noaccel=1 in the kernel parameter, the system starts fine, but
X would only work with fbdev driver - as GPU locks up at early stages of
startup (dmesg attached above).

With nouveau.noaccel=1 in the kernel parameter, system starts fine without the
lock up message, but X will **still** only work with fbdev - using nouveau with
result in a looped output of the following message:

"nouveau 0000:0a:00.0: DRM: 0x13DC: Parsing digital output script
table"

And the system is inaccessible, this also appears to hang any `systemctl stop
lightdm` operation and even the `reboot` command itself.

---------------------------

Xorg-Server version: 1.18.4
Kernel version: 4.8.6
xf86-video-nouveau version: 1.0.12

---------------------------

I would happily donate one of my FX4500's to one who's willing to
investigate
this issue.

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--- Comment #1 from Mingcong Bai <jeffbai at aosc.xyz> ---
Created attachment 127957
  --> https://bugs.freedesktop.org/attachment.cgi?id=127957&action=edit
dmesg with nouveau.noaccel=1

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--- Comment #2 from Mingcong Bai <jeffbai at aosc.xyz> ---
Created attachment 127958
  --> https://bugs.freedesktop.org/attachment.cgi?id=127958&action=edit
lspci output

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--- Comment #3 from Mingcong Bai <jeffbai at aosc.xyz> ---
Created attachment 127959
  --> https://bugs.freedesktop.org/attachment.cgi?id=127959&action=edit
Xorg log - nouveau.noaccel=1 enabled, using nouveau

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Mingcong Bai <jeffbai at aosc.xyz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|Other                       |PowerPC
                 OS|All                         |Linux (All)
           Severity|normal                      |critical

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--- Comment #4 from Mingcong Bai <jeffbai at aosc.xyz> ---
Created attachment 127960
  --> https://bugs.freedesktop.org/attachment.cgi?id=127960&action=edit
Xorg log - nouveau.noaccel=1 disabled (without this parameter), using nouveau

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--- Comment #5 from Mingcong Bai <jeffbai at aosc.xyz> ---
A similar report is filed to the Kernel bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=187581 as I am not sure where the
issue really is.

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

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

--- Comment #6 from Martin Peres <martin.peres at free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance:
https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/304.

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