I'm not sure if this has been solved, but I have the same problem. When installing 8.04.1 server LTS from a USB stick on a brand new machine that does not have a CDROM, the installation fails at CDROM detection.
SOLUTION: Get a shell (ALT+F2) and enter: $ mount -t vfat <your_usb_stick_device> /cdrom and the installation will continue. In my case, it stopped again saying that the cdrom could not be read properly. Looking at the output on the ALT+F4 screen, there was a message like: /cdrom/dists/stable/Release was not found... Serious bug... There ain't no 'stable' directory, but only one called 'hardy'... Tried to link hardy->stable, but it did not work (vfat file system). So I just copied the entire tree: $ cp -pR /cdrom/dists/hardy /cdrom/dists/stable And the installation continues smoothly 'till the end. -- Installer does not properly detect USB CDROM https://bugs.launchpad.net/bugs/104113 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs