Unable to unlock after disconnecting second display while locked
Lenovo T490, Intel graphics, Ubuntu 20.04, Regolith
2 displays: internal panel and an external display When screen locks after a timeout or manually, disconnecting external display result in the view of apps on the internal display panel as if it wasn't locked. The system is not responsive at this point - no reaction to any keys or mouse clicks. The only way to unlock is to reconnect the external display.