Comment 6 for bug 556962

Yes, I would gladly try another installation if it helps. I reinstalled, using both the Xubuntu alternate image, dated 2010-04-16, and the Xubuntu Desktop image, dated 2010-04-17. Both images installed and ran! I think I can say this issue is fixed, whether or not we know what fixed it. I was able to perform the same installations and additions without the monitor shutting off and the system inaccessible. The two items I did find are:

Alternate installer insists drives are a raid array if they are partitioned the same, regardless of mount points and denial from user. My third drive has two 110 GiB partitions, which are identified as failing to properly mount as a raid array. They are simply two partitions, which I designated be mounted as /usr/bak/Downloads and /usr/bak/Music. They are not accessible after the install from the alternate cd because it doesn't find the array usable.

The Desktop image does not recognize three hard drives as valid. I could use sda or sdb, but not sdc. I can not even tell it to use the third hard drive, because it is not in the partition editor.