Public bug reported:
light-locker started 2 days or so ago to switch off the display backlight when
it should switch them on.
The screens turn on in order to display the password dialog, but after entering
the password the screens start flickering and then all end up with the display
backlight switched off and even go into power-save mode.
Not even the previous workaround of briefly switching to the console and
back helps anymore since light-locker is taking over again and making
the same mistake.
The only workaround is now to either to:
1. ssh in from another machine and kill light-locker (then at least the primary
display can be accessed and the whole setup properly initialized with xrandr
2. blindly switch to the console and reboot the machine with alt-ctrl-del
Neither option is sustainable in the long run.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: light-locker 1.7.0-2ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-30.32-generic 4.8.6
Uname: Linux 4.8.0-30-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Dec 11 12:56:32 2016
InstallationDate: Installed on 2014-05-30 (926 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
SourcePackage: light-locker
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: light-locker (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug zesty
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https://bugs.launchpad.net/bugs/1649076
Title:
light-locker switches displays dark when it should unlock them in
multidisplay setups
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