I think this is due to Deepin Desktop Environment, which I install just now, from ubuntudde-ppa. I tried this post:- https://askubuntu.com/questions/818919/xubuntu-16-04-how-do-i-make-it-lock-screen-automatically-after-timeout But, xfce-power-manager was not working?. Whenever I sleep/suspend the system, the is no login screen after resuming, just black blank screen, with some screen brightness, I also can't reach tty and I have to force shutdown, to reboot.

  • Can you press e.g. Ctrl + Alt + F3 after resuming and check if you see a login prompt? Jul 2, 2021 at 14:55
  • Apparently, I don't get the login prompt nor can I reach the tty, from a logined session Jul 3, 2021 at 2:59

1 Answer 1


The problem was xfce4 package had some how got deleted. After reinstalling it everything is fine now

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