Bug#801298: nvidia-alternative: prevents nouveau driver from loading

[Maiku]

I was running into this issue myself, testing something with both
nouveau and the proprietary nvidia driver installed, trying to switch
between them across restarts.

When trying to run nouveau, removing /etc/modprobe.d/nvidia.conf
stopped the nvidia module from automatically being loaded. It also
worked to simply comment out the alias lines from that configuration
file:

alias pci:v10DEd0E00sv*sd*bc04sc80i00* nvidia
alias pci:v10DEd0AA3sv*sd*bc0Bsc40i00* nvidia
alias pci:v10DEd*sv*sd*bc03sc02i00* nvidia
alias pci:v10DEd*sv*sd*bc03sc00i00* nvidia

Judging from the comment just above the alias lines:

# These aliases are defined in *all* nvidia modules.
# Duplicating them here sets higher precedence and ensures the selected
# module gets loaded instead of a random first match if more than one
# version is installed. See #798207.

It seems that having these alias lines here, perhaps sets the priority
above nouveau as well as the legacy proprietary drivers?

-Maiku

Bug#801298: nvidia-alternative: prevents nouveau driver from loading

[Lars Noschinski]

Quoting Andreas Beckmann :


On 2015-10-08 13:56, Lars Noschinski wrote:

here the additional information you requested


Thanks!


(I reinstalled nvidia-cuda-icd for this).


Although this seems not to have reenabled the backlist (you don't have
libcuda1 installed, do you?, but you had it installed when you hit the
problem), I think I see what happened here ...


It does block nouveau from being loaded (just tried it again: install  
nvidia-cuda-icd, reboot):


$ sudo lsmod | grep nouveau
$

If you look at the provided logs, only /var/log/Xorg.0.log.old shows  
the nouveau driver actually being used, /var/log/Xorg0.log shows that  
vesa is being used.


libcuda1 is not installed, no.

Now, "apt remove nvidia-alternative", reboot, everything is fine again.

   -- Lars

Bug#801298: nvidia-alternative: prevents nouveau driver from loading

[Andreas Beckmann]

please
  reportbug -N 801298
on the system where you experienced this

this should collect lists of installed packages etc. that would help me
analyze this

thanks

Andreas

PS: the solution is probably

  update-alternatives --config glx

and select mesa-diverted

Bug#801298: nvidia-alternative: prevents nouveau driver from loading

[Lars Noschinski]

Package: nvidia-alternative
Version: 340.93-3
Severity: normal

Dear Maintainer,

after yesterdays updates, todays reboot lead to a system without usable
video setup. After some experiments, it turned out that this was due to
the nouveau driver not being loaded automatically (the binary nvidia
driver is and was never installed).

Removing nvidia-alternative (and the package nvidia-opencl-icd
depending on it) fixed this problem.

I did not explicitly install any nvidia- or opencl-related packages, it
seems they were pulled in recursively by libhwloc.

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.2.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Bug#801298: nvidia-alternative: prevents nouveau driver from loading

[Lars Noschinski]

I did not explicitly install any nvidia- or opencl-related packages, it
seems they were pulled in recursively by libhwloc.


To prevent misunderstandings: nvidia-alternative was also installed  
before. I would guess that the last (successful) reboot was with  
340.76-5, although 340.93-1 was installed in between.

Bug#801298: nvidia-alternative: prevents nouveau driver from loading

[Andreas Beckmann]

On 2015-10-08 13:56, Lars Noschinski wrote:
> here the additional information you requested

Thanks!

>(I reinstalled nvidia-cuda-icd for this).

Although this seems not to have reenabled the backlist (you don't have
libcuda1 installed, do you?, but you had it installed when you hit the
problem), I think I see what happened here ...


Andreas