Bug#929834: Buster/XFCE unlock screen is blank

["Theodore Ts'o" <tytso@mit.edu>]

On Sat, Jun 01, 2019 at 06:16:58AM +0530, Raj Kiran Grandhi wrote:
> 
> 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.

There's another workaround (which is the one I use):

	xset s off

This has other consequences as well, of course, but I tend to suspend
my laptop if it's ever going to be left alone, particularly if it's
running on battery.

And once I found a workaround which worked for my laptop, I was too
lazy to find a more "proper" fix.  :-)

					- Ted