[ubuntu] Every Icon on my desktop has vanished

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http://ubuntuforums.org – Hi all, all the icons on my desktop have just vanished. Some other show a lock image on them. There is also a problem related to "Read-only-file system" but I cannot fix it, I have tried with fsck options with no positive result. I can do some things using: sudo su nautilus. It seems there is a problem with my file system. Can you help me please? even my mouse doesn't work properly on the desktop. (Hardware)