optimus-manager: Optimus manager crashes when system upgrades to python 3.9

Please rebuild the package from the AUR. It will then use Python 3.9 instead of Python 3.8. I faced this same error, and rebuilding the package fixed it.

Credits: LIN_X42’s comment on the AUR page for optimus-manager.

I had to chroot into my system, disable lightdm, and update the system to be able to get xorg working properly. Once I could log into a graphical session, I reinstalled optimus manager, cleaned up stale system config files (optimus-manager --clean) and then enabled lightdm again. This worked for me.

This seems to affect all AUR packages that depend on the AUR. I wrote a little script to update all of these pacakges (not just optimus-manager). This way you don’t have to rebuild a bunch of AUR packages that don’t need to be rebuilt:

#!/bin/bash
# Find the AUR packages that require python and rebuild them

aur=$(pacman -Qqm | sort);
req=$(pactree -rl -d 1 "python" | sort);
yay -S --rebuild $(comm -12 <(echo "$aur") <(echo "$req"));

I might write a hook to do this automatically, I’ll comment here again if that works out

Thx for getting back.

yay -R optimus-manager; yay -S optimus-manager does not actually rebuild the package. It uninstalls it and reinstalls the old package from your pacman cache.

I think yay has a --rebuild flag or something similar though. Not really sure what it exactly is, because I’m not a yay user. Might also be --cleanbuild, check the docs.

I used yay -R optimus-manager followed by yay -S optimus-manager, when installing I chose to recompile everything from source, which yay does by removing the cached version and by reinstalling.

Now my computer seems to be in Intel mode. I can read the GPU temperature sensor but nvidia-settings is not working.

This is the log of optimus manager (which is similar to the one posted above):

[27] INFO: # Xorg pre-start hook
[27] INFO: Previous state was: {'type': 'pending_pre_xorg_start', 'requested_mode': 'integrated', 'current_mode': None}
[27] INFO: Requested mode is: integrated
[905] INFO: Available modules: ['nouveau', 'bbswitch', 'acpi_call', 'nvidia', 'nvidia_drm', 'nvidia_modeset', 'nvidia_uvm']
[947] INFO: No processes currently holding the Nvidia GPU
[947] INFO: Unloading modules ['nvidia_drm', 'nvidia_modeset', 'nvidia_uvm', 'nvidia'] (if loaded)
[950] ERROR: Xorg pre-start setup error
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/optimus_manager/bash.py", line 11, in exec_bash
    out = subprocess.check_output(
  File "/usr/lib/python3.9/subprocess.py", line 420, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/lib/python3.9/subprocess.py", line 524, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['bash', '-c', 'modprobe -r nvidia_drm nvidia_modeset nvidia_uvm nvidia']' returned non-zero exit status 1.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/optimus_manager/kernel.py", line 255, in _unload_modules
    exec_bash("modprobe -r " + " ".join(modules_to_unload))
  File "/usr/lib/python3.9/site-packages/optimus_manager/bash.py", line 18, in exec_bash
    raise BashError(
optimus_manager.bash.BashError: Failed to execute 'modprobe -r nvidia_drm nvidia_modeset nvidia_uvm nvidia' :
modprobe: FATAL: Module nvidia is in use.


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/optimus_manager/hooks/pre_xorg_start.py", line 51, in main
    setup_kernel_state(config, prev_state, requested_mode)
  File "/usr/lib/python3.9/site-packages/optimus_manager/kernel.py", line 25, in setup_kernel_state
    _nvidia_down(config)
  File "/usr/lib/python3.9/site-packages/optimus_manager/kernel.py", line 101, in _nvidia_down
    _unload_nvidia_modules(available_modules)
  File "/usr/lib/python3.9/site-packages/optimus_manager/kernel.py", line 207, in _unload_nvidia_modules
    _unload_modules(available_modules, ["nvidia_drm", "nvidia_modeset", "nvidia_uvm", "nvidia"])
  File "/usr/lib/python3.9/site-packages/optimus_manager/kernel.py", line 257, in _unload_modules
    raise KernelSetupError("Cannot unload modules %s : %s" % (str(modules_to_unload), str(e)))
optimus_manager.kernel.KernelSetupError: Cannot unload modules ['nvidia_drm', 'nvidia_modeset', 'nvidia_uvm', 'nvidia'] : Failed to execute 'modprobe -r nvidia_drm nvidia_modeset nvidia_uvm nvidia' :
modprobe: FATAL: Module nvidia is in use.

[951] INFO: Removing /etc/X11/xorg.conf.d/10-optimus-manager.conf (if present)
[951] INFO: Writing state {'type': 'pre_xorg_start_failed', 'switch_id': '20210104T174910', 'requested_mode': 'integrated'}

This log makes no sense as there are no processes holding the GPU and I have manually and successfully ran: > sudo modprobe -r nvidia_drm nvidia_modeset nvidia_uvm nvidia

To be honest, I’d like to know how to help with this because this tool is incredibly helpful to me and I thank the developer for all the work!

found this after 2hours of debugging. I was suspecting Xorg for no GUI or diplay after update but it was Optimus. Automatic rebuild or some other fixes will be appreciated.

It took me a few days to figure out why updating (a whole bunch of stuff including) python broke my entire system. It would be pretty cool if this didn’t happen in the future.