I am not sure whether it is really the gnome-shell that it responsible. However, it happens with more than one application (Emacs and the terminal window), and I can exclude the graphics driver.
** Package changed: ubuntu => gnome-shell (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1861391 Title: Full-screen window flickers once when switching to it Status in gnome-shell package in Ubuntu: New Bug description: When using *some* applications (I observed it with Emacs and gnome- terminal) in full-screen mode, they flicker once shortly after switching to them with e.g. Alt-Tab. To reproduce it: 1. Open Emacs in full-screen mode and one other application (e.g. Chromium). 2. Switch to the other app with Alt-Tab. 3. Switch back to Emacs. Then I observe: 1. Emacs becomes visible. 2. After a fraction of a second, the Emacs windows is transparent for a very very short time (flicker). 3. Then, the windows is stable and usable. Usually, I do not observe this behaviour right from the start. I have to work with the computer for a couple of minutes to see it. I have been unable to find out whether a certain action triggers the problem. However, when it occurs, it does not go away again until the next restart of the X server. This is regression that I observe since Ubuntu 19.10. Changes of the graphics driver does not change anything, however, switching to Wayland solves the problem. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1861391/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
