Bug#900248: nvidia-driver: update to 390.59 breaks direct rendering

[Luca Boccassi]

On Thu, 2018-05-31 at 11:07 +0200, Peter De Wachter wrote:
> > Fortunately another user reported a possible alternative, if you
> > have
> > time could you please try to drop a nvidia.conf in
> > /usr/share/X11/xorg.conf.d with the following content:
> > 
> > Section "OutputClass"
> >         Identifier      "Nvidia Modules"
> >         MatchDriver     "nvidia-drm"
> >         Driver          "nvidia"
> >         Option          "AllowEmptyInitialConfiguration" "true"
> >         ModulePath      "/usr/lib/nvidia"
> > EndSection
> > 
> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900428
> > 
> > As before also restore the original libglx.so in modules/extension,
> > and
> > remove the Nvidia symlink altogether.
> 
> Yes, that works.
> 
> I noted that there was already a similar config file,
> nvidia-drm-outputclass.conf, that also has a MatchDriver "nvidia-drm"
> line. I don't know how X handles that: were they merged, or was one
> of
> them ignored?

Not sure, I'll have a look

> Also it looks like /usr/lib/nvidia might contain multiple
> incompatible
> libglx.so files:
> xserver-xorg-video-nvidia: /usr/lib/nvidia/current/libglx.so
> xserver-xorg-video-nvidia-legacy-304xx: /usr/lib/nvidia/legacy-
> 304xx/libglx.so
> xserver-xorg-video-nvidia-legacy-340xx: /usr/lib/nvidia/legacy-
> 340xx/libglx.so
> 
> I don't know if these packages can be installed together. If they
> can,
> there will be random failures again.
> 
> Best regards,usual
> Peter

Yes, same problem with the recursive search - each series will point to
 its directory instead of /usr/lib/nvidia, to avoid that problem.

Andreas, does adding this xorg file and removing the libglx.so
registration sound like a good plan to you?

-- 
Kind regards,
Luca Boccassi
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