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I ugraded my Debian from Stretch to Buster. Now each time I switch the tty (by Ctrl-Alt-FX) from my graphical instance (F7) to something else (e.g. F1) and back, I have to login again. It seems that LightDM is restarted. I am sure that this was not the case when I used Stretch. Is there any way to reconfigure this?

  • Is it a real login, or is it just the screen saver that has started and locked the screen? – Kusalananda Apr 27 at 18:35
  • A real login. In particular, all previously opened windows are gone. – FKranhold Apr 27 at 20:29
  • Okay … I think this is related to the following bug: bugzilla.redhat.com/show_bug.cgi?id=1662057. The XServer crashes and the error is the same: “modeset(0): failed to set mode: Invalid argument” – FKranhold Apr 27 at 21:32
  • You should edit your question and add that information. – G-Man Apr 28 at 3:24

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