[Nouveau] [Bug 94832] Reverse Prime corruption with nouveau using radeon outputs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94832

--- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Christoph Haag from comment #5)
> Created attachment 122736 [details]
> dmesg
> 
> Somehow I forgot to check dmesg.
> 
> I guess the
> [   39.172099] nouveau 0000:00:0d.0: bus: MMIO write of 007c0001 FAULT at
> 00b010
> indicate a problem...

Nope, that's expected. Something weird with the PMPEG unit on the cards.
Although usually the errors happen just once at boot... dunno.

And to further clarify, you get the corruption as in the photo no matter what
once you enable the second screen? Given what the photo looks like, seems like
there's an issue with strides... perhaps the fb stride isn't being propagated
properly? All the dispnv04 code is pretty much stuck in antiquity unfortunately
=/ And none of the PRIME stuff has been tested with pre-G80 GPUs.

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