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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1495030 Title: lightdm-gtk-greeter hangs, leaving session locked with gray screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1495030/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
