desktop-packages team mailing list archive

[Robert Ancell <robert.ancell@xxxxxxxxxxxxx>]

I'm still not able to reproduce this problem locally.

There are two patches that may be causing this problem:
09_close_pipes.patch and 11_quit_timeout.patch (the others seem unlikely
to have caused a problem like this).

What would be very useful is if someone who is reproducing the problem can:
- Try building a package without either of the above patches and see which one is causing the problem. The packaging is in lp:~robert-ancell/lightdm/1.2.3-0ubuntu2.6 and can be built with bzr-buildpackage.
- Try building from lp:lightdm/1.2 with bzr-buildpackage. This contains more patches not SRU'd - perhaps one of these fixes this loop?
- Use gdb to find where in lightdm it is looping

More detailed instructions for building locally:
$ bzr branch lp:~robert-ancell/lightdm/1.2.3-0ubuntu2.6 lightdm-lp1431654
$ sudo apt-get build-dep lightdm
$ cd lightdm-lp1431654
(disable patches in debian/patches)
$ bzr-buildpackage
$ sudo dpkg -i ../build-area/lightdm_1.2.3-0ubuntu2.6_amd64.deb ../build-area/liblightdm-gobject-1-0_1.2.3-0ubuntu2.6_amd64.deb

-- 
You received this bug notification because you are a member of Desktop
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