I had same problem in Kubuntu. nvidia-prime chages /etc/lightdm/lightdm.conf greeter parameter to unity-greeter. This change prevents lightdm starting. To fix it i had to change greeter back to lightdm-kde-greeter.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-prime in Ubuntu. https://bugs.launchpad.net/bugs/1224098 Title: xserver wont start after nvidia-prime installation Status in “nvidia-prime” package in Ubuntu: Confirmed Bug description: I have done a fresh install of saucy, before the installation of nvidia-prime lightdm-gtk-greeter was set in lightdm.conf. During the installation of nvidia-prime the greeter ist changed to unity-greeter which causes a crash and no display after a reboot. When changing the greeter back to lightdm-gtk-greeter everything works fine. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: nvidia-prime 0.4 ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0 Uname: Linux 3.11.0-7-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.12.1-0ubuntu3 Architecture: amd64 Date: Wed Sep 11 22:11:06 2013 InstallationDate: Installed on 2013-09-11 (0 days ago) InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902.1) MarkForUpload: True PackageArchitecture: all SourcePackage: nvidia-prime UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1224098/+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
