[Nouveau] [Bug 78441] [NV46] X does not start under kernel 3.13.x

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78441

--- Comment #8 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #7)
> Not sure that it's helpful, but I tried with the latest kernel (provided by
> Fedora 19 - 3.14.4-100.fc19.i686) and it still failed to start the X
> session.  I noticed, on the console while shutting down, that I was seeing
> messages:
> 
> E[Xorg[609]] failed to idle channel 0xcccc0001 [Xorg[609]]
> E[Xorg[609]] failed to idle channel 0xcccc0000 [Xorg[609]] 

This is an indication that the GPU hung.

This is not the sort of thing that'll just fix itself... a bisect would
probably identify the offending commit, which would probably be enough to
figure out what the issue is. I scanned through all the nouveau commits between
3.12 and 3.13, and nothing jumped out as possibly causing this, but a lot of
times there are completely unintended effects.

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