Until two days ago, using two monitors in Ubuntu 20.04 was no problem. However, since yesterday, this is not possible anymore, even though I did not change the cable setup or anything. Also, when I go to "Settings"–>"Displays", it shows me "Unknown Display" whereas previously it had showed me the two connected monitors. I have an Nvidia GPU built in, any help would be appreciated.
Edit: Interesting, this problem does not occur under Windows where I can use my two monitors without any problems.