I've just upgraded from Xubuntu 14.10 to 15.04. After rebooting I was presented with a blank screen. Switching to a terminal I could see that lightdm-gtk-greeter was consuming 100%. After that I switched back to the graphical environment. Then I clicked the left-mouse button at a random position and the normal login screen came up and I could log in.
I added the allow-debugging=true option to lightdm-gtk-greeter.conf and restarted. I attached the resulting x-0-greeter-log. After that added the option active-monitor=0 as suggested in one of the comments above. This workaround solves the problem for me. After the reboot the login screen comes up immediately. ** Attachment added: "Greeter log with allow-debugging enabled" https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1410406/+attachment/4383167/+files/x-0-greeter.log.old.gz -- 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/1410406 Title: black screen after booting, 100% cpu usage Status in lightdm-gtk-greeter package in Ubuntu: Confirmed Bug description: After booting, I get no login screen, but a black screen. inspecting the running processes in a vterm, I see lightdm-gtk-greeter consuming 100% of one processor. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: lightdm-gtk-greeter 1.9.0-0ubuntu1 ProcVersionSignature: Ubuntu 3.18.0-8.9-generic 3.18.1 Uname: Linux 3.18.0-8-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.15.1-0ubuntu2 Architecture: amd64 Date: Tue Jan 13 19:14:47 2015 InstallationDate: Installed on 2014-12-30 (14 days ago) InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141229) ProcEnviron: TERM=screen PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: lightdm-gtk-greeter 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/1410406/+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
