Same issues on Dell XPS developer edition:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1562 root 20 0 264m 3488 2836 R 100 0.0 13:25.13 lightdm
Ubuntu 12.04.
The issue start after last package update.
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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:
New
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)
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