[Nouveau] [Bug 17571] New: Nouveau and PPC64 issues

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=17571

           Summary: Nouveau and PPC64 issues
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: r.goyet at gmail.com
         QAContact: xorg-team at lists.x.org


Running nouveau on PPC64 is a whole experience :-)

 - Running from git/master crashes X : "(EE) NOUVEAU(0): No known BIOS
signature found"

 - Removing nvidiafb and using only offb was suggested, done, but didn't change
a lot of things

 - Commenting { "PROM", load_vbios_prom }," in nv_bios.c fixed the first issue.

 - I was then back to the same state I was at a few weeks ago : the screen is
full of weird vertical multicolored lines.

 - Taking a screenshot with ImageMagick's 'import' shows a perfectly good image

 - Trying to go back to the console (killing X) would show a black screen

 - Adding "return;" at the start of the run_tmds_table function in nv_bios.c
mostly fixes the issu : the screen is now totally readable, even though some
artefact appear throughout the screen

 - Adding `Option "Randr12" "Off"' in your xorg.conf device section eventually
totally fixed the issue, letting me use nouveau on a PPC64 machine !!


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