sounds more of a lightdm issue since LightDM itself does not start so Unity is not to blame here.
Also instead of KDM try GDM and make sure to run the command 'unity --reset' in the GDM session. you seem to have enabled some non standard plugins from CCSM as well. ** Also affects: lightdm (Ubuntu) Importance: Undecided Status: New ** Changed in: unity (Ubuntu) Status: New => Incomplete -- 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/1010879 Title: unity broken after update of packages Status in “lightdm” package in Ubuntu: New Status in “unity” package in Ubuntu: Incomplete Bug description: Hi, I just let Ubuntu 12.04 upgrade packages, but after that, lightdm stopped to work - black screen (I have to use KDM to login to Unity) and Unity doesn't respect font and icon settings. For me, it seems like it needs some packages that probably had been uninstalled before, but I don't know which packages and reinstalling of unity and ubuntu-desktop doesn't work. Thank you ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: unity 5.12-0ubuntu1.1 ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16 Uname: Linux 3.2.0-24-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu8 Architecture: amd64 CompizPlugins: [core,ccp,composite,opengl,compiztoolbox,decor,imgjpeg,imgpng,move,vpswitch,grid,resize,place,session,gnomecompat,mousepoll,regex,wobbly,animation,animationaddon,loginout,fade,cube,workarounds,expo,scale,ezoom,unityshell,dbus,widget] Date: Sat Jun 9 15:10:58 2012 InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427) SourcePackage: unity UpgradeStatus: Upgraded to precise on 2012-04-20 (49 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1010879/+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