Bingo, Once I downgrade lightdm package to Oneiric version http://security.ubuntu.com/ubuntu/pool/main/l/lightdm/lightdm_1.0.6-0ubuntu1.4_i386.deb all things are ok
** Attachment added: "with Oneiric lightdm" https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/951404/+attachment/2852010/+files/.xsession-errors -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/951404 Title: Ubuntu 12.04 session don't open with lightdm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/951404/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
