Public bug reported:
Since the update to Ubuntu 18.04 (ubuntu budgie) the screensaver stopped
working.
Description of the error:
When I lock the screen, the display turns black (as intended). However, when I
press a key or move the mouse to turn the display again, no login-dialog is
shown - instead I see the lockscreen wallpaper and the mouse cursor shows
graphical glitches (becoming invisible and visible when moving it).
I can unlock again by typing `gnome-screensaver-command -d` into a tty.
I have found out, that the program 'gnome-screensaver-dialog' crashes
with a SIGSEV and causes the described failure. Purging and reinstalling
the package 'gnome-screensaver' did not help. Running 'gnome-
screensaver-dialog' with gdb generates the attached output (which is
hopefully useful for tracking down the problem).
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-screensaver 3.6.1-8ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: Budgie:GNOME
Date: Fri Jun 22 00:15:10 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-02-14 (127 days ago)
InstallationMedia: Ubuntu-Budgie 17.10 "Artful Aardvark" - Release amd64
(20180106)
SourcePackage: gnome-screensaver
UpgradeStatus: Upgraded to bionic on 2018-04-29 (53 days ago)
** Affects: gnome-screensaver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
** Attachment added: "Output of running gnome-screensaver-dialog with gdb."
https://bugs.launchpad.net/bugs/1778143/+attachment/5155340/+files/gnome-screensaver-dialog-crash.txt
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Desktop Bugs, which is subscribed to gnome-screensaver in Ubuntu.
https://bugs.launchpad.net/bugs/1778143
Title:
SIGSEV when turning on display while screensaver is active (gnome-
screensaver-dialog crash)
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