Public bug reported: The problem is solved by removing Xfce Screensaver.
Linux rasp 5.4.0-1007-raspi #7-Ubuntu SMP Mon Mar 30 10:08:22 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux Version: 0.1.10-0ubuntu1 ** Affects: xfce4-screensaver (Ubuntu) Importance: Undecided Status: New ** Tags: raspberry screensaver xubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872134 Title: XFCE frezees when inactive for a while. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-screensaver/+bug/1872134/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs