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 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 -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
