grub-2.00-7 debian bugs

a)

it installs the efi loader when grub-pc is installed, it does not check if grub-efi-amd64 is really installed

b)

when efibootmgr is called with -w option it overwrites the serial number in the mbr (efi can be used with mbr partitions as well, just the efi fat partition has to be a primary one).

dd if=/dev/sda bs=1 skip=440 count=4 2>/dev/null|hd
00000000  00 08 a6 5f

when this is changed then windows mbr installs (on the same hd as the efi partition) do not work anymore because the bootloader stores the hd serial.

also older efi boot entries do not work just because of that. there an example output with efibootmgr -v:

original:

Boot0000* gummiboot     HD(3,1860a800,96000,0000680b)File(\EFI\gummiboot\gummiboot.efi)

created after efibootmgr -w:

Boot0001* gummiboot     HD(3,1860a800,96000,5fa60800)File(\EFI\gummiboot\gummiboot.efi)

if you happen to have got an old entry you can restore the correct serial otherwise you have got a problem and you need to fix the bootloader.

suggested fix:

--- grub-install.orig	2012-09-26 19:01:12.000000000 +0200
+++ grub-install	2012-09-27 16:37:30.889616940 +0200
@@ -293,7 +293,8 @@
 			modprobe -q efivars 2>/dev/null || true ;;
 		esac
 		if [ -d /sys/firmware/efi ] && \
-		   [ -d "${libdir}/grub/x86_64-efi" ]; then
+		   [ -d "${libdir}/grub/x86_64-efi" ] && \
+		   [ -d /usr/share/bug/grub-efi-amd64 ]; then
 		    target="x86_64-efi"
 		else
 		    target=i386-pc
@@ -856,7 +857,7 @@
 	    gettext_printf "Can't find GRUB drive for %s; unable to create EFI Boot Manager entry.\n" "$efidir" >&2
 	else
 	    efidir_part="$(echo "$efidir_drive" | sed 's/^([^,]*,[^0-9]*//; s/[^0-9].*//')"
-	    efibootmgr $efi_quiet -c -d "$efidir_disk" -p "$efidir_part" -w \
+	    efibootmgr $efi_quiet -c -d "$efidir_disk" -p "$efidir_part" \
 		-L "$bootloader_id" -l "\\EFI\\$efi_distributor\\$efi_file"
 	fi
     fi