Well done!!! After your suggestion I've checked the log and I've found a critical problem for gdm: It continues to restart if it hasn't space left on the disk!!! Weird!!! Absurd!!! It's a critical bug cause only of gdm cause the entire system continues to work perfectly and the user doesn't receive any message of this kind of silly problem.I've simply freed some space and gdm has started normally. Please correct this bug! Thank you for your co-operation!
-- gdm continues to restart https://launchpad.net/bugs/40216 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs