I have this problem only after installing a clean Ubuntu 12.04.2. The new hardware stack (*-lts-quantal) is installed by default.
Here is a typical case to reproduce: 1) Only user A is logged in 2) Switch to user B via indicator (using HUD) -> Success 3) Switch back to user A via indicator (using HUD) -> Black screen I don't experience this bug on the original Precise hardware stack. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1001221 Title: 12.04 black screen with blinking cursor when switching users Status in “lightdm” package in Ubuntu: Confirmed Bug description: When switching users on 12.04 it will sometimes just go to a black screen with a cursor. The user switching to is not logged in yet. Expected behavior: Click current user up top> from the drop-down click the user wanting to log in > brought to the lightdm log in screen and log that user in Instead: Click current user up top> from the dropdown click the user wanting to log in > brought to a black screen with a blinking cursor From here, you cannot type or initiate any keyboard shortcuts other than Ctrl +Alt+F(1-6) to reach tty1 etc, or Ctrl+Alt+F7 to return to the user that you were originally trying to switch from. Ctrl+Alt+F8 will bring you back to the black screen. This happens pretty often so I should be able to test anything needed. Thanks! ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: lightdm 1.2.1-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 NonfreeKernelModules: fglrx ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 Date: Fri May 18 08:00:55 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash 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/1001221/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
