Public bug reported:
* I have gone through `do-release-upgrade` and the system has upgraded
successfully.
* I have rolled back the graphic drivers to nouveau to have a clean drivers
installation
Once I tried to run `$ sudo ubuntu-drivers autoinstall` to install graphics
drivers, this exception was raised:
```
Traceback (most recent call last):
File "/usr/bin/ubuntu-drivers", line 513, in <module>
greet()
File "/usr/lib/python3/dist-packages/click/core.py", line 1128, in __call__
return self.main(*args, **kwargs)
File "/usr/lib/python3/dist-packages/click/core.py", line 1053, in main
rv = self.invoke(ctx)
File "/usr/lib/python3/dist-packages/click/core.py", line 1659, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/lib/python3/dist-packages/click/core.py", line 1395, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/lib/python3/dist-packages/click/core.py", line 754, in invoke
return __callback(*args, **kwargs)
File "/usr/lib/python3/dist-packages/click/decorators.py", line 84, in
new_func
return ctx.invoke(f, obj, *args, **kwargs)
File "/usr/lib/python3/dist-packages/click/core.py", line 754, in invoke
return __callback(*args, **kwargs)
File "/usr/bin/ubuntu-drivers", line 432, in autoinstall
command_install(config)
File "/usr/bin/ubuntu-drivers", line 187, in command_install
UbuntuDrivers.detect.nvidia_desktop_pre_installation_hook(to_install)
File "/usr/lib/python3/dist-packages/UbuntuDrivers/detect.py", line 839, in
nvidia_desktop_pre_installation_hook
with_nvidia_kms = version >= 470
UnboundLocalError: local variable 'version' referenced before assignment
```
It looks like `version` is an unitialized variable, Cheers.
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1998853
Title:
ubuntu-drivers autoinstall --- UnboundLocalError
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