[ubuntu] No desktop

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http://ubuntuforums.org – My sons unity interface stopped working on 12.04 LTS, he is young and is prone to not shutting it down properly, I tried reinstalling gdm via this advice which described the problem http://askubuntu.com/questions/14160...ics-mode-error However apart from one boot up correctly which failed after I set it to autologin its got a bit worse. I can see the command line OK, so its not damaged and it boots up ok via a USB Ubuntu stick and to add insult to injury its dual boot and Vista is fine, now when I try and manually start lightdm I get (Hardware RNG device inode not found. " (Hardware)