Comment 8 for bug 1721394

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Doug McMahon (mc3man) wrote : Re: [Bug 1721394] Re: Cannot open nvidia-settings on pc with a hybrid device (or use prime-select), missing python

On 10/08/2017 05:11 AM, Yuriy Padlyak wrote:
> After python-minimal installation and switching to intel the suggested relogin doesn't work. I've tried reboot, but now the setting doesn't start again. This time with a different error:
> ERROR: The control display is undefined; please run `nvidia-settings --help`
> for usage information.
>
Not sure that has anything to do with  this bug. When switching prime
profiles a restart is required (gdm3 only), that's a separate
longstanding unattended to bug.
https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1704781
Maybe something went south for you when trying to do the switch via a
log out?