i installed qubes 4.0.3. uefi boot won't work. had to go legacy.
qubes seems fine. but i couldn't get anything else booting. i had windows, ubuntu and fedora installed, uefi. the bios couldn't find my disk anymore for uefi, so i couldn't reconstruct the bcd. bootrec /fixboot said access denied. Pretty screwed. I discovered that Qube rewrote my EPS EFI boot. I don't know what kind of bootx64.efi it put in there. replacing it with stock windows didn't fix it though. Turns out byte 0x1be in the protective MBR was 0x80 and it should have been 0x00. Once I flipped that bit it was ok. That's the first byte of the parition table entry that reserves the entire disk (that's why it's called a protective mbr). 0x80 means active - ie bootable. Dell doesn't like that. It's gotta be 0x00. linux xxd command is all you need to fix this. Altho you should probably back up lots of stuff. like sgdisk -b gpt-backup /dev/xxxx. dd if=/dev/xxxx bs=512 count=1 > etc. fortunately the ubuntu and fedora efi stuff in the EPS were still there. Getting windows to rebuild it's part of the EPS was easy and worked ok. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/78dab3ea-6615-408c-8cb3-34200b4b6684n%40googlegroups.com.
