[Nouveau] [Bug 56461] NV11 black screen & kernel hang on loading nouveaufb

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56461

--- Comment #36 from Chris Paulson-Ellis <chris at edesix.com> ---
(In reply to comment #33)
> Does booting with nouveau.agpmode=0 and/or
> nouveau.config=DEVINIT=NvForcePost=1 change anything? (please test all 3
> combinations)

For these tests, I'm working with nouveau HEAD 73e5cf2d + dpms-fix.

Doing "modprobe nouveau" results in the fade-to-black problem as before - as do
all the following tests.

Doing "modprobe nouveau apgmode=0" removes the console messages about AGP 4x
mode and changes the GART aperture from 64 MiB to 128 MiB.

Doing "modprobe nouveau config=DEVINIT=NvForcePost=1" adds a console message
about "running init tables", changes the VRAM size from 15 MiB to 31 MiB (!)
and results in a never ending stream of PFIFO errors.

Doing "modprobe nouveau apgmode=0 config=DEVINIT=NvForcePost=1" has the
expected console changes from the 2 tests above, but with a GPU lockup error
instead of the PFIFO errors.

I'll attach console logs for the above tests.

Chris.

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