I tried to install 4.0 on my girlfriends' old crappy Gericom laptop (Celeron M, 512 MB RAM) from CD yesterday, since its BIOS can't boot from USB devices other than floppy, and encountered a number of problems:
First the installer comes as far as starting the installation process, but then complains after a few seconds that it couldn't mount /dev/cdrom (what exactly does it think it was loaded from?!). So far so bad, but I happened to have a 4.0 live stick around, so I used that as install source. That worked, the install completed, no errors - but I was left with an empty boot sector: Grub just didn't install, even though the box in the installer was checked and it reported success installing in the log!
Any hints how to fix that? My only idea would be that grub wasn't installed on /dev/hda (the IDE HDD) but rather on /dev/sda (the USB thumbdrive), but since you can't select where to put grub in the installer, I've no clue how to work around that if it really were the case.
Kind regards & thanks in advance,