It shows the computer as online after a remote restart, but then I still cannot connect (just fails with no error message) until I log in locally. After that I can connect remotely and everything works fine. The target computer is running Ubuntu 20.04 and TeamViewer 15 (start with system is checked).
No update to this in a month?
Anyone else having problems. I just installed Debian 10 and TV Host 15. I'm having the exact same problems.
I had a similar problem with my Ubuntu 20.04/20.10 Desktop.
I solved it by completely disabling Wayland because on my machine it was enabled for the login screen but not for the desktop. So I could only connect after login in.
Current state of Wayland + TeamViewer: https://community.teamviewer.com/t5/Linux-EN/State-of-Wayland-amp-TeamViewer/td-p/26340