Public bug reported:
lightdm tries to initialize screen output, fails, tries again, fails
until the backlight electronics break, killing the monitor.
lightdm fails initializing screen. This turns on backlight, initializes
graphics, then lightdm stops with an error message. systemd starts
lightdm again. Lightdm tries to initialize graphics. This turns on
backlight. Lightdm fails, exausts an error message, backlight turns off
again. systemd starts lightdm, lightdm tries to initialize graphics.
Turns on backlight. Exausts an error message. Backlight is turned off
again. ...
After doing so more than twice a second backlight breaks. Electronics
broke down.
Conclusion: at the moment Ubuntu 18.10 is capable of killing monitors by
lightdm not able to initialize screens and breaking, then beeing
restarted by systemd.
Since this can kill hardware it is a no go! It is a bad bad bad bad bad
bad bad bad bad bad bad bad bad bad bug!
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: lightdm 1.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
Date: Sat Nov 3 17:03:19 2018
InstallationDate: Installed on 2011-10-19 (2571 days ago)
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: lightdm
UpgradeStatus: Upgraded to cosmic on 2018-11-03 (0 days ago)
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug cosmic
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https://bugs.launchpad.net/bugs/1801533
Title:
lightdm does not start
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