Screen / desktop briefly visible on resume just before lock screen is activated
Affected version
Ubuntu 20.04, gnome-shell 3.36.4, Xorg
Edit by @jfft: appears to affect all versions, including on Wayland, as per comments below. See also the related issue in GDM.
Bug summary
When resuming my laptop from suspend (i.e. opening lid) the entire screen is visible just before the lock screen is activated.
Steps to reproduce
- enable lock screen etc.
- suspend by closing lid
- resume by opening lid
What happened
The screen with all the window content is visible for about 1 second. Then the lock screen is activated.
What did you expect to happen
The lock screen should be activated as soon as the laptop goes into standby, and do not expose the window content on resume.
Edited by Jeff Fortin