update, I tried to reinstall using CD, because when I'm doing the third
attempt (install from CD) I remember the cd led wasnt blinking, although
I'm sure I've chosen the correct boot order in the bios, and have booted
from CD.
just to make sure nothing went wrong, and this time I've erased all the
confirmed here,
I have downloaded ubuntu-9.10-desktop-amd64.iso three times(spend all
night), from three different mirror, all of them match the checksum with
the one from https://help.ubuntu.com/community/UbuntuHashes,
three time installation with the same result.
1. install from harddisk, succ
