[Nouveau] Help needed for bug 58556

[pierre.morrow at free.fr]

----- Mail original -----

> De: "Ilia Mirkin" <imirkin at alum.mit.edu>
> À: "pierre morrow" <pierre.morrow at free.fr>
> Cc: nouveau at lists.freedesktop.org
> Envoyé: Vendredi 31 Janvier 2014 23:58:58
> Objet: Re: [Nouveau] Help needed for bug 58556

> I meant disable it much harder -- like tell nouveau to just ignore it
> as though modeset=0 was passed in for it. Also I seem to recall you
> can do an outb (even from grub) that will just turn off the nv96 card
> entirely.

So I denied pci to enable the card, but nothing changed: with noaccel, screen is still corrupted and without it, I still don't boot, getting lots of errors. 
Oh, I forgot to precise: the screen gets scrambled just after the handover from efifb to nouveaufb. 

> pstore if you have efi, netconsole, blockconsole. And phone isn't so
> bad either :)

> Yeah, so all these things should only be necessary if you have
> acceleration enabled. I wonder if the card comes up in a funny "I'm
> still executing stuff" state and nouveau fails to "shut it down" when
> noaccel is passed in.

Well, from what I saw in nouveau_accel_init, it just enables things if noaccel=0, and does nothing otherwise; noaccel isn't used apart from accel_init. 

> -ilia

Pierre 
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