On Sat, Feb 02, 2008 at 04:41:06PM -0500, George Lengel wrote:
> When I reboot I get thrown into rescue mode and typing set shows
> grub>prefix= (hd0,7)/boot/grub
> grub>root=hd0,7
>
> If I manually set root to (hd2,7) and prefix to (hd2,7)/boot/grub I can
> insmod normal and then running normal proceeds perfectly. It makes no
> sense to me why it is prepending hd0 instead of hd2. I have searched all
> over for a solution and the closest I came was someone a few months ago
> posted a similar problem. It was suggested to delete system.map and
> regenerate it, but this did not help.
Sounds like grub_boot_drive not having the right info. It works when received
via multiboot, but not from boot.img.
Does the attached patch fix your problem? Just a guess ...
--
Robert Millan
<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call… if you are unable to speak?
(as seen on /.)
diff -ur grub2/boot/i386/pc/boot.S tmp/boot/i386/pc/boot.S
--- grub2/boot/i386/pc/boot.S 2008-01-07 20:52:08.000000000 +0100
+++ tmp/boot/i386/pc/boot.S 2008-02-02 23:37:36.000000000 +0100
@@ -105,21 +105,6 @@
/* general setup */
cli /* we're not safe here! */
- /*
- * This is a workaround for buggy BIOSes which don't pass boot
- * drive correctly. If GRUB is installed into a HDD, check if
- * DL is masked correctly. If not, assume that the BIOS passed
- * a bogus value and set DL to 0x80, since this is the only
- * possible boot drive. If GRUB is installed into a floppy,
- * this does nothing (only jump).
- */
-boot_drive_check:
- jmp 1f /* grub-setup may overwrite this jump */
- testb $0x80, %dl
- jnz 1f
- movb $0x80, %dl
-1:
-
/*
* ljmp to the next instruction because some bogus BIOSes
* jump to 07C0:0000 instead of 0000:7C00.
diff -ur grub2/util/i386/pc/grub-setup.c tmp/util/i386/pc/grub-setup.c
--- grub2/util/i386/pc/grub-setup.c 2008-01-05 13:20:28.000000000 +0100
+++ tmp/util/i386/pc/grub-setup.c 2008-02-02 23:37:21.000000000 +0100
@@ -246,13 +246,6 @@
free (tmp_img);
- /* If DEST_DRIVE is a hard disk, enable the workaround, which is
- for buggy BIOSes which don't pass boot drive correctly. Instead,
- they pass 0x00 or 0x01 even when booted from 0x80. */
- if (dest_dev->disk->id & 0x80)
- /* Replace the jmp (2 bytes) with double nop's. */
- *boot_drive_check = 0x9090;
-
/* If the destination device can have partitions and it is the MBR,
try to embed the core image into after the MBR. */
if (dest_dev->disk->has_partitions && ! dest_dev->disk->partition)
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