From my desktop environment, I’m able to switch to a virtual console using ctrl-alt-f2 or ctrl-alt-f6, etc. But once I’m there I’m unable to leave. When I press ctrl-alt-f?, nothing happens. Also, from my desktop environment, hitting ctrl-alt-f8 brings up a black screen that I’m unable to leave.
I’m experiencing the same thing with NixOS 21.05 under VMware Player. I can get from the desktop out to the virtual consoles, but no way to get back. Alt-F7 or Ctrl-Alt-F7 does nothing.