[Nouveau] [Bug 58378] [NV86] Distorted graphics on NVIDIA GeForce 8400M G after upgrade the kernel to 3.7.0 version

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58378

--- Comment #85 from Thomas <tomshere at t-online.de> ---
(In reply to comment #82)
> > I also have these errors in dmesg 
> > 
> > [   18.985158] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000
> > FAULT at 0x00fd94
> > [   18.986213] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000
> > FAULT at 0x103d94
> > [   19.026027] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000010
> > FAULT at 0x10200c
> 
> Hmm - your kernel and your nvapeek results clearly suggest you should be
> affected...
> 
> Have you enabled compiz(...)

No I don't think so.

> > [   18.984164] nouveau E[  PTHERM][0000:01:00.0] unhandled intr 0x00000161
> 
> This last "PTHERM" error seems to be a different, unrelated issue.
> 
> > When I use the kernel option nouveau.config=PCRYPT=0 it doesn't eliminate
> > the errors and X still hangs when resuming.
> 
> Hmm - interesting, as I clearly don't have any issues with suspend/resume.
> Which laptop do you have? Did you already update your BIOS to the latest
> available version?
> 
> > I was not sure if I have to set the parameter in quotes.
> 
> No, you don't (and AFAIK, you even must not). Ilia has already proposed the
> correct workaround for the distortion issue (until your distro of choice has
> integrated the new fix) - add this:
> 
> nouveau.config=PCRYPT=0,PVP=0,PBSP=0,PMPEG=0
> 
> to your grub kernel parameters. Having done so, all "MMIO write" errors in
> dmesg must be gone (they are for me!), otherwise something else is still
> wrong for you in addition.

Ok, now after adding the whole bunch to the kernel opts the three PBUS errors
are gone. For the resume failure I open a new issue.

How can I push the integration of such a fix into another distro?

Many thanks!
-Thomas

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