I upgraded to Ubuntu 20.04 today, choosing LightDM over gdm3 during the upgrade. During the upgrade I was asked if I wanted to keep or replace
/etc/sane.d/dll.conf file. I decided for keeping it.
Now, without actively rebooting, the "Oh no! Something went wrong" screen appeared.
As I am still inexperienced with this kind of troubleshooting, I feel it wouldn't be safe to just try out answers from other threads that don't have exactly the same 'history'.
Solutions I read included Ctrl+Alt+F4 and trying to login and get more information from the command line (Oh no! Something has gone wrong on restart).
Is that safe to do? Ideally, I'd like to save my data that is stored on an encrypted harddrive before trying to fix errors. I'd like to avoid reinstalling the OS.
From reading other threads, I know this post may be criticised as not being precise enough or haven't tried enough, but really I cannot get more information from that white screen myself and don't want to risk ruining everything just to provide more information...
Thank you for your help!! :)
Edit: I have no idea if the problem is related to lvm2-activation-generator, as in Ubuntu 19.10 “Something has gone wrong” after update from 19.04 This and other solutions include booting from a live usb. Can I do this 'safely' by simply switching the laptop off at this stage? Do I have to do sth before?