[Bug 89664] Nouveau fails to enter KMS with the Gigabyte G1 Gaming GTX970

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=89664

--- Comment #27 from Mikołaj Świątek <mikolaj.swiatek@gmail.com> ---
(In reply to Ben Skeggs from comment #25)
> (In reply to Mikołaj Świątek from comment #24)
> > (In reply to Ilia Mirkin from comment #23)
> > > Have a look at bug #100676. Is it the same issue? (Please test the patches
> > > that were provided there.)
> > 
> > I don't *think* it's the exact same issue. The screen photo in that report
> > is similar to what I see, though my text output is completely
> > unintelligible, rather than just slightly corrupted. The reason I thought it
> > was this bug was that the log messages about unknown connectors and failing
> > to create encoders are identical with Omar's in my case.
> > 
> > In any event, I've built the kernel module from Ben's tree and it didn't
> > change anything at all, same behaviour.
> 
> Can I see your kernel log output from that please?  Bonus points if you boot
> with "log_buf_len=8M nouveau.debug=trace".

Tried to do it that way, but it somehow resulted in so much output that I
couldn't even see the boot log with journalctl. I guess the kernel ring buffer
fills up and  the beginning gets overwritten before journald can read it? Not
an expert at debugging kernel modules by any stretch, so let me know if I'm
missing something obvious here.

In the meantime, uploaded a run with nouveau.debug=debug.

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