I may not be doing this correctly, but I ran the following to attempt to
debug the running lightdm process using the package from the precise
proposed ppa again. The command I ran is:
sudo gdb lightdm 24513
Of course, 24513 was the running lightdm process. Interesting thing
here is, once gdb output debug info, the process stopped utilizing 100%
of my cpu. Once I quit gdb, the process started utilizing 100% of a cpu
core once again.
If it helps, the debug output is in the attached file.
** Attachment added: "lightdm_gdb_output.txt"
https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+attachment/4346642/+files/lightdm_gdb_output.txt
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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:
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)
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