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

[bugzilla-daemon at freedesktop.org]

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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