Before I try GNOME desktop, I tried some additional things: 1) From the Ctrl_Alt+F1 terminal console, running 'sudo systemctl restart lightdm' restarts my desktop environment and everything is ok until a few minutes idle time causes the problem again.
2) In the Xfce desktop panel I removed the Power Manager Plugin. I also used 'ps -ef | grep power' to identify the xfce4-power-manager process id, and killed it with sudo kill, such that no xfce4 power management processes are listed by ps. After allowing many minutes of idle time, the problem does *not* occur. 3) I booted into the default desktop environment from the bootable Xubuntu 20.04.1 LTS USB stick (the same stick I installed from back in May 2020). The problem doesn't occur, even though xfce4-power-manager is running. Does this give any further clues? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1912670 Title: Mouse buttons and keyboard unresponsive after idle time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1912670/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
