The reason of this issue was that the update manager removed the xserver unduly (the bug was there not in xorg).
I am very sorry, I have not been deliberate enough and I have not realized this mistake unless I checked the date of the log files. This bug report is invalid! -- [g41] Blank screen after upgrade and reboot [Ubuntu 10.10alpha1 ] https://bugs.launchpad.net/bugs/592044 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp