I think this bug should relate to lightDM, after I switched to gdm, this bug gone and everything works fine.
And I have nvidia GTX460 video card with P67 motherboard(ASUS M4E) -- 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/874218 Title: LightDM restarts after first login attempt Status in “lightdm” package in Ubuntu: Confirmed Bug description: When I initially boot or reboot my computer and am presented with the LightDM login screen, two strange things happen: 1) There are some weird graphical artifacts near the top of the screen that change as I type in my password. 2) After entering the password (correctly) and hitting enter, the LightDM screen disappears, my displays are turned off, and only moments later I'm presented with the login screen again. Logging in the second time is successful and I'm able to reach the desktop. It seems like these might be part of the same problem. I can't say for sure whether this is consistent behavior because I only upgraded yesterday. I'm using NVIDIA binary drivers with TwinView, Oneiric. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/874218/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

