Ubuntu 8.10 installer fails to detect CD-ROM

After choosing Language, Country and Keyboard-Layout, the Installer tries to detect the CD-ROM, but you get following message:

"No common CD-ROM drive was detected You may need to load additional CD-ROM drivers from a floppy... Otherwise you will be given the option to manually select CD-ROM modules. Load drivers from Floppy?"

Answer No to the question and:

1. Switch to a second console pressing ctrl+alt+F2
2. Press Enter to activate that console
3. Type:modprobe ide-scsi
4. Switch back to the first console pressing ctrl+alt+F1

Now you get another question: "Manually select a CD-ROM module and device?"

1. Say Yes and choose the right option for you.
2. Most probably you have to choose cdrom or cdrom0
3. If it fails again, go back to the Debian Installer Main Menu and choose the option Detect and mount a CD-ROM

Now it should work!

For more information: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/260608
(Thanks to olalirole for this workaround)