Nouveau - Sep 2008 - [Bug 17571] New: Nouveau and PPC64 issues

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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--- Comment #1 from Stuart Bennett <sb476 at cam.ac.uk>  2008-09-14
10:29:19 PST ---
Curing the artefacts when in randr12 mode is the first step, so please make
register dumps from within X (if seeing to type is a problem, do it over SSH),
and attach them here -- one with randr12 disabled (and no corruption present),
and one with randr12 enabled and the corruption present -- as follows:

git clone git://people.freedesktop.org/~stuart/radeontool
make
./radeontool regs > logfile

Also, adding the xorg log from http://pastebin.com/m443a3b50 (or a similar
newer one) to this bug as an attachment will ensure it doesn't get lost.


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--- Comment #2 from r.goyet at gmail.com  2008-10-10 10:08:13 PST ---
Created an attachment (id=19575)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=19575)
Xorg output


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--- Comment #3 from r.goyet at gmail.com  2008-10-10 10:08:51 PST ---
Created an attachment (id=19576)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=19576)
radeontools reg, without randr12


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--- Comment #4 from r.goyet at gmail.com  2008-10-10 10:09:11 PST ---
Created an attachment (id=19577)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=19577)
radeontools reg, with randr12


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--- Comment #5 from r.goyet at gmail.com  2008-10-10 10:09:57 PST ---
Added requested attachments.
By the way, radeontool's output doesn't seem to change with or without
randr


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--- Comment #6 from Stuart Bennett <sb476 at cam.ac.uk>  2008-10-13
19:22:40 PST ---
Created an attachment (id=19639)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=19639)
Remove some reg differences shown by radeontool

I'm not sure what you mean in the above comment: a diff of the two
radeontool
logs you attached shows some differences.  Please try the attached patch and
see if it improves randr12 mode.  Note that this patch is made against current
git, so you need to update to that to apply it; be sure to apply the
"return;"
at the start of run_tmds_table, and use offb, as before (the load_vbios_prom
issue is now fixed upstream).

If it's possible for you to test a monitor with a regular analogue vga input
at
some stage, that would also be very useful.


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

Lucas Stach <dev at lynxeye.de> changed:

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

--- Comment #7 from Lucas Stach <dev at lynxeye.de> 2011-02-08 09:07:37
PST ---
No reaction from reporter for two years now. If you still have issues please
try with a recent nouveau version and open a new bugreport.

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