[Bug 2000787] [NEW] Live system cannot leave 'Lock Screen' when selected from menu

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I thought this was bug 1989163 but it remains when that bug is squashed.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: lubuntu-desktop 23.04.3
ProcVersionSignature: Ubuntu 5.19.0-21.21-generic 5.19.7
Uname: Linux 5.19.0-21-generic x86_64
ApportVersion: 2.24.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.477
CurrentDesktop: LXQt
Date: Fri Dec 30 14:30:38 2022
LiveMediaBuild: Lubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20221229)
SourcePackage: lubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)

This fails for me (reported in comments #5, #13, #14 of bug 1989163):

Selecting 'Lock Screen' works in my Dell Precision M4800, when running
Lubuntu Kinetic Live. The screensaver starts and runs (a bit stuttering,
different from earlier). The problem is to get rid of it. I get a pop-up
window 'XscreenSaver 2021, v6.02' and it should be happy when pressing
Enter or OK (with a blank password) but nothing happens and I have to
stop the graphical desktop environment via ctrl+alt+F2.

This seems to be different from your descriptions, but I guess it is
related.

Edit: I created a second user (in the live system at the virtual text
screen tty2) and logged into it. Then tried 'Lock Screen' and then it
worked to get back into the desktop environment. So in my case it seems
that the pop-up window 'XscreenSaver 2021, v6.02' wants a non-blank
password :-/

It fails not only in a Dell with nvidia but also in a Toshiba with Intel
graphics. I think you can reproduce the bug in most live Lubuntu Lunar
systems.

I don't know the name of the package containing the 'Lock Screen' tool
called by the menu, so please modify the target package to the correct
one.

** Affects: casper (Ubuntu)
     Importance: Medium
         Status: In Progress


** Tags: amd64 apport-bug iso-testing lunar mantic
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Live system cannot leave 'Lock Screen' when selected from menu
https://bugs.launchpad.net/bugs/2000787
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