On 2022-01-24 18:52:28 +0100, Vincent Lefevre wrote: > On 2022-01-24 18:32:43 +0100, Yves-Alexis Perez wrote: > > out of curiosity, did you try to move the mouse (and bring it “back” to the > > main screen) and see if the login dialog appears? My main setup also uses a > > dual screen (docked laptop with an external screen), and I didn't (yet) > > experienced the issue you describe, but both my screens have pretty similar > > resolutions (laptop is 1920×1080, external screen is 1920×1200). > > I had tried to move the mouse, but this didn't have any effect. So > this is rather different than bug 993752 (where moving the mouse > switches the width of the screen) I had reported in September.
Note that the virtual screen is the 4K one, thus only a part of the desktop is visible on the laptop screen (there is no scrolling). The mouse pointer cannot go beyond of the 4 edges (and corners) of this 4K virtual screen. > > Also are both screens on and visible? In my latest test, I noticed the following: initially, only the laptop screen was visible, and it had the login dialog, but a fraction of second later, it became black also for a fraction of second, then the screen appeared on both monitors (laptop + left 4K monitor), mirrored, but without the login dialog and menu. So I suspect that lightdm detected that a second monitor was connected *after* the greeter appeared. It handled it, but the greeter was then no longer visible. Note also that if I type Alt-F4 to do a shutdown, a confirmation dialog should appear, but it doesn't. I can still confirm by hitting Enter, though. -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)