FYI, in case there are some lesser experienced users that have this
issue and are looking for a temporary solution for the time being, below
are the instructions to revert to the previous release of lightdm until
this gets resolved.
You can do this with the following command in a terminal (<CTRL + ALT +
T>):
sudo apt-get install lightdm=1.2.3-0ubuntu2.5
Then to kill the current lightdm session and start a new one using the
previous released version, log out, then press <CTRL + ALT + F1>. Log
into the fullscreen terminal session. Then type the following:
sudo service lightdm stop
sudo service lightdm start
Then to close the terminal session, press <CTRL + ALT + F1> once again,
type exit, then <CTRL + ALT + F7> to return to your lightdm session.
After that, you can log in and you're back to normal.
I also locked the lightdm package after reverting back for the time
being so that I don't accidentally reinstall the broken version by doing
the following in a terminal:
sudo echo "lightdm hold" | dpkg --set-selections
Once this gets fixed or a new version is released later on, you can
release the lock/hold with the following command in a terminal:
sudo echo "lightdm install" | dpkg --set-selections
Hope that helps!
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1431654
Title:
lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Status in lightdm package in Ubuntu:
Confirmed
Bug description:
Since updating lightdm today, one core of my CPU is always maxed out
at 100%. I rolled back to version 1.2.3-0ubuntu2.5 and the issue
stopped. I tried this with 2 different kernels: 3.2.0-77-generic and
3.2.0-79-generic and and version 1.2.3-0ubuntu2.6 of lightdm still
caused 100% cpu usage.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: lightdm 1.2.3-0ubuntu2.6
ProcVersionSignature: Ubuntu 3.2.0-77.114-generic 3.2.66
Uname: Linux 3.2.0-77-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Thu Mar 12 20:20:12 2015
ExecutablePath: /usr/sbin/lightdm
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MarkForUpload: True
ProcEnviron:
TERM=linux
PATH=(custom, no user)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions
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