I disabled all crypto partition and the problem persists. (I previously had an encrypted home partition, unlocked with libpam-mount. Now, I used a new user with no crypto at all.) I also started lightdm-gtk-greeter- settings to disable the background image and user image, to make the warnings go away. But the problem still persist. The log still contains nothing that looks suspicious to me (expect maybe "DEBUG: Got 1 message(s) from PAM" doesn't say which one).
After about 30min of gray screen, I went to terminal and started gdb -p $pid, where $pid is the process id of the 100% CPU process lightdm-gtk- greeter, to attach a debugging session and see where the process hangs. Interestingly, after ~20 debug steps, it runs again and waits for user input. I go back to Ctrl+Alt+F8, and can log in again! (what the...?) After login, I see a prompt for authentification with org.freedesktop.accounts.change-own-user-data . Maybe it is related to that? -- You received this bug notification because you are a member of LightDM Gtk+ Greeter Development Team, which is subscribed to lightdm-gtk- greeter in Ubuntu. https://bugs.launchpad.net/bugs/1495030 Title: lightdm-gtk-greeter hangs, leaving session locked with gray screen Status in lightdm-gtk-greeter package in Ubuntu: New Bug description: On a fresh Xubuntu 15.04 install, I created a new user. When I lock the session (or resume from standby, which also locks the session), I see nothing but a screen in light gray. After about a minnute, the screen goes black (power safe), pressing any key brings back the gray screen. There is no possibility to unlock the session. Ctrl+Alt+F1 brings me to terminal, where I can see with `top` that "lightdm-gtk- greeter" takes 100% CPU. The log contains warnings about background images that can not be read. I believe those are warnings only and not fatal errors. Version of lightdm-gtk-greeter: 2.0.0-0ubuntu1. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: lightdm 1.14.2-0ubuntu1 ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5 Uname: Linux 3.19.0-28-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.4 Architecture: amd64 CurrentDesktop: XFCE Date: Sat Sep 12 10:02:29 2015 InstallationDate: Installed on 2015-09-03 (8 days ago) InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1) 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-gtk-greeter/+bug/1495030/+subscriptions -- Mailing list: https://launchpad.net/~lightdm-gtk-greeter-team Post to : [email protected] Unsubscribe : https://launchpad.net/~lightdm-gtk-greeter-team More help : https://help.launchpad.net/ListHelp
