Nouveau - May 2017 - [Bug 101220] xorg-server-1.19.3 crashes when trying to enable HDMI output

https://bugs.freedesktop.org/show_bug.cgi?id=101220

--- Comment #12 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Pacho Ramos from comment #11)
> I don't use any initrd... I could rely on CONFIG_EXTRA_FIRMWARE... but
I
> thought I didn't need that as nouveau is compiled as a module and not
into
> the kernel :|
OK, well if modules are loaded off the FS and not initrd, then you're good
on
that front, assuming you really do have the updated linux-firwmare (April 4 or
later --
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=b14134583c2a15d4404695f72cb523daedb877ab).
Lots of people use initrd without understanding how it works.

So there are two issues here...

#1: we should probably disable reverse prime if you don't have acceleration
(or
figure out how to make it work without accel... should just be a very slow
memcpy away... not great, but better than a non-working screen)

#2: we should figure out what's going on with accel on your GP107 -- looks
like
stuff is just hanging (that's the "timeout" messages you see,
we're waiting for
some condition to become true, and it never does).

I can help with the former, and hopefully Ben Skeggs can investigate the
latter.

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