Comment 23 for bug 1024383

I agree with Jordan's new title.
And also with Phillip statement (You can't boot windows in bios mode if grub is booted in efi mode, and vice versa).

I saw several Windows installations which are bootable both via Legacy and via UEFI.
I agree with Jordan's suggestion to always create&display both Legacy and UEFI based Win entries.

+1 to add the error message too, and i suggest to add it 'live' at boot. For example, via grub-script we could maybe detect if grub was loaded in Legacy or UEFI; if loaded in Legacy mode, then it would add "(won't work unless BIOS is setup to boot in UEFI mode)" at the end of ALL uefi entries. And vice versa: if loaded in UEFI mode, it would add "(won't work unless BIOS is setup to boot in Legacy mode)" at the end of ALL bios entries. . In order to shorten the string and to avoid too much localization work, maybe eg "Ubuntu 13.04 (UEFI mode)" would be enough.
BTW, i know that "won't work unless BIOS is setup to boot in Legacy / UEFI mode" is not totally correct vocabulary (should be "won't work unless your firmware is setup to boot in BIOS / UEFI mode"), but that's what users will generally find in their firmwares, so let's make their life easier ;)