Public bug reported:
I originally installed Ubuntu MATE 14.10 which I then updated to 15.04.
At some point I decided to try KDE Plasma 5, so I installed the kubuntu-
desktop package.
I got the prompt asking me whether I wish to run lightdm or sddm and I
chose lightdm. However after reboot I got black screen which loaded
plasma cursors and I was unable to do anything without going to TTY.
Running "systemctl status lightdm && systemctl status sddm" told me that
they both were running and I solved this with "systemctl disable sddm"
and rebooted and got lightdm normally.
I think this might have something to do with Ubuntu 15.04 using systemd
by default and sddm not having systemd unit.
PS. I am not fully sure if this is sddm issue, but I feel this is. Feel free to
move this to correct place if I am wrong.
PPS. I experienced this week or two ago, but I don't think there have been
upgrades to these packages, so I am sorry if this is known issue and already
fixed.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: sddm 0.11.0-0ubuntu10
ProcVersionSignature: Ubuntu 3.19.0-14.14-generic 3.19.3
Uname: Linux 3.19.0-14-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: MATE
Date: Tue Apr 21 19:59:52 2015
InstallationDate: Installed on 2014-12-19 (123 days ago)
InstallationMedia: Ubuntu MATE 14.10 "Utopic Unicorn" - amd64 (20141023)
SourcePackage: sddm
UpgradeStatus: Upgraded to vivid on 2015-04-05 (15 days ago)
upstart.sddm.override: manual
** Affects: sddm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug third-party-packages vivid
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https://bugs.launchpad.net/bugs/1446760
Title:
sddm and lightdm can run at the same time
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