Bug#801330: glx-alternative-nvidia upgrade failed

[Goran LAZAREVIC]

Hi everyone,

During last upgrade, the glx-alternative-nvidia package (0.6.91 /
unstable) failed to configure. Here's the output :

>root at GOGI: apt-get upgrade
> ...
> ...
> Treatment of deferred shares ("triggers") for nvidia-glx-alternative
(0.6.91) ...
> update-alternatives: error: The /etc/modprobe.d/nvidia.conf alternative link is already
managed by nvidia
> dpkg: package error processing nvidia-glx-alternative (--configure): 
subprocess installed post-installation script returned error exit status 2
> ...
> ...
> Errors were encountered while processing:   nvidia-glx-alternative
> E: Sub-process / usr / bin / dpkg returned an error code (1)

and

> root at GOGI:/home/gogi# dpkg -l | grep glx-alternative-nvidia
> iF  glx-alternative-nvidia               
0.6.91                              amd64        allows the selection of
NVIDIA as GLX provider



Actually my Debian Sid system was running on the experimental nvidia
driver version (352.41-1) when this happened. When I restarted it, I
fell on tty login screen instead of gdm login one.
This was caused by the failing configuration process, as the nouveau
driver was loas instead of the nvidia one, because of no more
"nvidia-blacklists-nouveau.conf" file in /etc/modprobe.d which should
normally blacklist the nouveau driver.
Doing it manually solves the problem.

I tried to downgrade nvidia-driver to unstable version (340.93-4),
thinking that it may solve temporarily the issue as its version from
unstable repository or some of its dependencies may not be already
compatible with glx-alternative-nvidia (0.6.91), but that operation
neither could be done, as the glx-alternative-nvidia package which is
pushed in unstable repository (0.6.91) breaks some of the dependencies
(as i.e. nvidia-alternative (<340.93.-5), while the version available in
unstable is still (340.93-4).


Greetings

-- 
*Goran LAZAREVIC*
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