I'm on ubuntu 18.04.
I installed nvidia-driver-390 through my Software & Updates and it started Performance mode, which I don't need for the most of the time so I switched to Power Saving mode, it hang for a while and told me to reboot and so I did. But now I can't start nvidia-settings to turn performance mode back on, I get following errors when trying to run
ERROR: NVIDIA driver is not loaded ERROR: Unable to load info from any available system
While I'm pretty sure it should start in some kind of poor-mode with limited options. Did I do something wrong or is that a bug? How do I switch between modes?