[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
This bug was fixed in the package lightdm - 1.2.3-0ubuntu2.7 --- lightdm (1.2.3-0ubuntu2.7) precise; urgency=medium * debian/patches/15_gsources.patch: - Correctly remove GSources on finalize (LP: #1431654) lightdm (1.2.3-0ubuntu2.6) precise; urgency=medium * debian/patches/09_close_pipes.patch: - Close pipes correctly (LP: #1190344) * debian/patches/10_conf_section_name.patch: - Correct section name in default users.conf (LP: #1069218) * debian/patches/11_quit_timeout.patch: - Destroy quit timeout when a process object is destroyed - fixes a crash where a deleted Process object might be accessed after a timeout (LP: #1207935) * debian/patches/12_layout_no_x11.patch: - Handle not getting an X connection when attempting to get X layouts (LP: #1235915) * debian/patches/13_introspection_makefile.patch: - Fix introspection build with newer versions of g-ir-scanner * debian/patches/14_compile_warnings.patch: - Fix compile warnings -- Robert Ancell robert.anc...@canonical.com Tue, 17 Mar 2015 14:21:43 +1300 ** Changed in: lightdm (Ubuntu) Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
I can confirm this bug Solution with package version 1.2.3-0ubuntu2.7 works. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Confirmation for the 32-bit version as well: 1.2.3-0ubuntu2.7 fixed it. Thanks! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Confirmation as well: Fix in 1.2.3-0ubuntu2.7 works, no longer high CPU usage. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
The bug fixed for me on Linux paz 3.2.0-79-generic-pae #115-Ubuntu SMP Thu Mar 12 14:33:25 UTC 2015 i686 i686 i386 GNU/Linux Thank you very much! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
I can confirm as well that lightdm v1.2.3-0ubuntu2.7 has indeed fixed this issue for me. Thank you for the quick turnaround! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Hello timothymowens, or anyone else affected, Accepted lightdm into precise-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lightdm/1.2.3-0ubuntu2.7 in a few hours, and then in the -proposed repository. Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance! ** Tags added: verification-needed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
** Branch linked: lp:ubuntu/precise-proposed/lightdm -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
this new package lightdm/1.2.3-0ubuntu2.7 is ok for me. thank Le 19/03/2015 21:01, Brian Murray a écrit : Hello timothymowens, or anyone else affected, Accepted lightdm into precise-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lightdm/1.2.3-0ubuntu2.7 in a few hours, and then in the -proposed repository. Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance! ** Tags added: verification-needed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Thank's to @robert-ancell and @timothyowens. Noob question : when will we see the new patch version in update manager ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
It looks like the changes in 1.2.3-0ubuntu2.6 may have changed the timing slightly and exposed an existing bug (possibly bug 836616). @timothyowens tested a fix from lp:lightdm/1.2 so I've released 1.2.3-0ubuntu2.7 with that. ** Changed in: lightdm (Ubuntu) Status: Confirmed = Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
** Tags added: regression-proposed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
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 Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
To add to comment #17, just now I replaced my empty 09_close_pipes.patch file with the actual patch, then rebuilt, installed and restarted the lightdm process. Upon logging in, it's back to using 100% of a cpu core again. So when the 09 patch is removed, no high cpu usage. When the patch is put back in, cpu usage is high again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Could you try building with an updated version of the patch I've attached? It's a bit of a stab in the dark but I've fixed a potential case where stdout might get accidentally closed. ** Patch added: 09_close_pipes.patch https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+attachment/4346670/+files/09_close_pipes.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
First patch didn't fix the issue: root 11395 93.0 0.0 270668 3488 ?Rsl 22:26 1:00 lightdm root 11401 12.3 1.2 263008 149876 tty7Ss+ 22:26 0:08 /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch I will try the 2nd one now. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Unfortunately, the 2nd patch still produces the high cpu usage on one core: root 2054 93.8 0.0 270668 3488 ?Rsl 22:35 1:40 lightdm root 2091 10.4 1.3 283756 170820 tty7Ss+ 22:35 0:11 /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Third times a charm :) ** Patch added: 09_close_pipes.patch https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+attachment/4346681/+files/09_close_pipes.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Looks like that did it: root 18958 0.0 0.0 270668 3496 ?Ssl 23:26 0:00 lightdm root 18964 11.0 1.0 246424 133256 tty7Ss+ 23:26 0:08 /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch Good work! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Hi Robert, While I am a developer, I don't have much experience developing in Linux or using Bazaar (bzr). With that being said, I wasn't exactly sure how to disable a patch per say, so what I did was backed up 09_close_pipes.patch by moving it to my desktop, then issuing touch 09_close_pipes.patch to create a blank file with the same name. I then built the package and installed it. After restarting lightdm, I have no CPU issues any longer. So it would seem that the bug is indeed in 09_close_pipes.patch. I hope this helps. I'll see if I can wrap my head around gdb to see if I can provide any more information. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
And it that doesn't work here is another updated patch. ** Patch added: 09_close_pipes.patch https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+attachment/4346676/+files/09_close_pipes.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
@timothyowens - great work! Thanks for pinpointing the patch. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
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! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Also, an addendum to the previous instructions, the Ubuntu repo that has version 1.2.3-0ubuntu2.5 of lightdm is the precise-updates repo. To add that repository, do the following: From terminal: sudo gedit /etc/apt/sources.list Add the following lines to the end of your file: ## Ubuntu Update Repos deb http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse Save changes, close the file, then run the following from Terminal: sudo apt-get update sudo apt-get install lightdm=1.2.3-0ubuntu2.5 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Fully confirm bug. Ubuntu 12.04.5 LTS 3.2.0-79-generic-pae #115-Ubuntu SMP Thu Mar 12 14:33:25 UTC 2015 i686 i686 i386 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Same bug here Ubuntu 12.04.5 LTS 3.2.0-79-generic #115-Ubuntu SMP Thu Mar 12 14:18:19 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Same issues on Dell XPS developer edition: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ 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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: lightdm (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Same here, 32_bit: 3.2.0-79-generic #115-Ubuntu SMP Thu Mar 12 14:21:14 UTC 2015 i686 i686 i386 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
If it helps, here's the x-0-greeter.log file while running lightdm v1.2.3-0ubuntu2.5 (when the 100% usage doesn't occur). ** Attachment added: x-0-greeter1.log https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+attachment/4343757/+files/x-0-greeter1.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Here's the x-0-greeter.log file generated from lightdm v1.2.3-0ubuntu2.6. ** Attachment added: x-0-greeter.log https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+attachment/4343749/+files/x-0-greeter.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
I apologize, the version of the kernel that was running when log file was generated was 3.2.0-79-generic (not 3.2.0-19-generic). Sorry for the typo. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Do you have /var/log/lightdm/lightdm.log after this occurs? Thanks. ** Changed in: lightdm (Ubuntu) Importance: Undecided = Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Process 28882 is the X server that has been started for the greeter. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Could you also get /var/log/lightdm/x-0-greeter.log? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1431654] Re: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage
Here is the lightdm log file pulled from /var/log/lightdm/lightdm.log. At 98.76s, I logged out of my session, but didn't get a log-in screen again (black screen on both monitors). At this point I killed the process (28882) so that I could downgrade lightdm again (from ctrl+alt+F1) and log back in. Not sure if it's applicable, but the log that was generated was with kernel version 3.2.0-19-generic running. Also, the proprietary graphics driver I'm running at the moment is Nvidia v340.76. I also tested with v340.65 but still ran into the 100% cpu usage with the newest proposed lightdm service. ** Attachment added: lightdm log file https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+attachment/4343680/+files/lightdm.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431654 Title: lightdm (1.2.3-0ubuntu2.6) 100%/high cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1431654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
