Hi, In a fresh install of Buster with XFCE desktop, locking the screen blanks the monitor and the monitor enters a power save state. After that, neither moving the mouse nor typing on the keyboard would turn the monitor back on. I could find two ways to get the display back on:
1. Typing the password without any visual feedback (while the monitor continues to be in the power save state) unlocks the screen and the user session is displayed normally. 2. Switching to another VT, say vt1 or vt2 turns the monitor back on and on switching back to the vt of the original session the unlock prompt is displayed normally and the screen can be unlocked. For a single user system, this is not a big deal, but is an important issue if multiple users are logged in simultaneously. I am not sure to which package this bug belongs to. The closest I could find online was this: https://bbs.archlinux.org/viewtopic.php?id=240200 wherein installing the nouveau video driver appeared to have fixed the issue. However, that solution is not applicable in my case as I have an integrated intel graphics controller. I had discovered this behaviour after a dist-upgrade to buster from the current stable. I then made a clean install onto a spare hdd using debian-buster-DI-rc1-amd64-netinst.iso and choosing the XFCE desktop and am able to reproduce this bug. Asking around on debian-user, I found a couple of other users who have also experienced this same issue. I shall be happy to assist the developers in troubleshooting this issue. Please let me know if any other info is needed. I am running on Intel i5-4440 CPU with its integrated graphics controller. Thank you, Raj Kiran