Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
I can switch to the virtual terminals using the known alt-ctrl-Fx combination, but when I try to switch back, there is only a black screen and no reaction. The only way I have found to reactivate the GUI is rather desctructive: restarting the window manager, thereby killing all applications in the previous session.
I have not found the exact same problem anywhere, but I do find a lot of complaints about screens going black after boot or in other situations. I cannot tell whether there is any parallel. What I do know is that it is independent of the window manager, i.e. I have installed the mate desktop and the problem was exactly the same.
I did not have this problem with previous versions of lubuntu, as far as I remember.
Anybody who can give me a hint where to focus my research? Thanks in advance!
PS: Sorry for the lack of tags, I did not know which to use in this case.