Also experienced on - lenovo thinkpad x201 (i5-m520, 4gb, i915)
2 monitor alignment changes before I experienced https://launchpad.net/bugs/2013074 (external monitor is attached)
i `sudo apt install xfwm4` ; at terminal started lxqt-config-session to replace openbox with xfwm4 & killed lxqt-session (panel was on 'black' monitor), on next login (ignoring the picom crashed too many times message) session was back to usable.
Also experienced on
- lenovo thinkpad x201 (i5-m520, 4gb, i915)
2 monitor alignment changes before I experienced https:/ /launchpad. net/bugs/ 2013074 (external monitor is attached)
i `sudo apt install xfwm4` ; at terminal started lxqt-config-session to replace openbox with xfwm4 & killed lxqt-session (panel was on 'black' monitor), on next login (ignoring the picom crashed too many times message) session was back to usable.