I've run into a brick wall trying to get 12.04.1 LTS running on my new MacBook Air 5,2 (2012 13" model). The problem I keep getting is GRUB failing to install; here's the output from virtual terminal 4:
Sep 9 02:02:57 grub-installer: info: Installing grub on '/dev/sda5' Sep 9 02:02:58 grub-installer: info: grub-install supports --no-floppy Sep 9 02:02:58 grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sda5" Sep 9 02:02:58 grub-installer: /usr/sbin/grub-probe: error: cannot find a device for /boot/grub (is /dev mounted?). Sep 9 02:02:58 grub-installer: error: Running 'grub-install --no-floppy --force "/dev/sda5"' failed.
I'm trying to dual-boot OS X and Ubuntu. I first resized the HFS+ partition in Disk Utility using OS X, then installed rEFIt, then dd'd the alternate-amd64+mac version of the disk image to a USB stick and booted off that. I'm also setting noapic before beginning the installation as recommended in this forum post.
At first, following the advice in that post, I tried the daily image from cdimage.ubuntu.com/precise/daily/current/ and was getting an error message almost identical to the above. Then, hoping the release version would be more stable, I dd'd "ubuntu-12.04.1-alternate-amd64+mac.iso" from cdimage.ubuntu.com/releases/12.04/release/ to my USB stick instead. Same result.
/dev/sda5 is a 1.0 MB partition of type "Reserved BIOS boot area".
Googling the "cannot find a device for /boot/grub" error doesn't seem to turn up anything relevant to my situation.
Any ideas how I can solve this?