Kubuntu 10.10 installation messed up grub

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http://www.linuxquestions.org – I have used openSUSE for a long time, but was trying to install Kubuntu 10.10 in addition to opensuse 11.3 and Windows 7 on a Gateway desktop (1500 GB hard disk & an external drive with 1000 GB. From the CD with the isoimage I got the live version and then decided to press install. I chose to follow the suggested choice of partition: About half of the external drive (500 GB) was allocated to Kubuntu while the internal hard drive contained Windows 7 and opensuse. Everything went well until I was asked to restart the computer. I got a black screen with the message: error: no such device: (HowTos)