UPDATE: To correct the bug description: After a reboot @ the login screen, touchscreen works. But after entering my password and log in to the desktop, touchscreen stops working (no matter whether it's the 'Ubuntu' or 'Ubuntu on Wayland' session).
UPDATE: To correct the bug description: After a reboot @ the login screen, touchscreen works. But after entering my password and log in to the desktop, touchscreen stops working (no matter whether it's the 'Ubuntu' or 'Ubuntu on Wayland' session).