[ubuntu] End of a first Linux adventure "Mountall: Plymouth command failed'

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http://ubuntuforums.org – Dear all, I need some help and I wann stress, I am a total Linux/Ubuntu Newbie. Installed Ubuntu yesterday, My ISO image is a bit older (Ubunt 10.4), but the installation was done with web connection, I believe therefore, the actual installation is more up to date... I cant check though, since Ubuntu does not boot. A clean installation, no parallel Win OS or anything, was successful. The frist boot after installing however produces a halt at: "Mountall: Plymouth command failed" (in German: "Plymouth-Befehl fehlgeschlagen") "Mountall: No connection to plymouth'' (in (Hardware)