[SOLVED] GRUB2: sudo update-grub succeeds but...

android-eve · 12-31-2010, 11:10 AM

OMG 10.04 is so cool!

But where did GRUB's menu.lst disappear?

OK, I found this thread, which explains that this a whole new game...

I was somewhat overwhelmed by the new syntax so I decided to simply rely on the automatic search feature of GRUB2 as explained in "Adding Entries to Grub 2" in this Basics document.

So I did so, but it didn't find the other Ubuntu 8.04 bootable partitions on my drive.

BTW, it seems that I have both 10_linux and 30_os-prober in /etc/grub.d:

Code:

drwxr-xr-x   2 root root  4096 2010-12-30 17:29 ./
drwxr-xr-x 127 root root 12288 2010-12-31 11:59 ../
-rwxr-xr-x   1 root root  4444 2010-07-01 17:26 00_header*
-rwxr-xr-x   1 root root  1416 2010-07-01 17:06 05_debian_theme*
-rwxr-xr-x   1 root root  4594 2010-07-01 17:26 10_linux*
-rwxr-xr-x   1 root root   918 2010-03-23 05:40 20_memtest86+*
-rwxr-xr-x   1 root root  6605 2010-07-01 17:26 30_os-prober*
-rwxr-xr-x   1 root root   214 2010-07-01 17:26 40_custom*
-rw-r--r--   1 root root   483 2010-07-01 17:26 README

What did I do wrong? What am I missing?

Update: Thanks to this thread, I managed to display the menu by simply commenting out the line:

Code:

GRUB_HIDDEN_TIMEOUT=0

Interestingly it contains the entries I edited by hand earlier into /etc/grub.d/40_custom:

Code:

menuentry "Ubuntu 8.04" {
set root=(hd0,0)
linux /boot/vmlinuz-2.6.24-28-generic
initrd /boot/initrd.img-2.6.24-28-generic
}

menuentry "Windows 7 Ultimate 64-bit" {
set root=(hd0,2)
chainloader (hd0,2)+1
}

But it refuses to boot either of these 2. So I am stuck for now with 10.04... What did I do wrong?

Larry Webb · 12-31-2010, 12:05 PM

There is no menu.lst in grub2, it is called grub.cfg and you are not supposed to edit it. I would think grub2 is confused with your location. Do the command sudo fdisk -l and post. Here is a good tutorial grub2

android-eve · 12-31-2010, 12:23 PM

Quote:

Originally Posted by Larry Webb

There is no menu.lst in grub2, it is called grub.cfg and you are not supposed to edit it.

Yes, I know. By the time I saw your reply I managed to edit /etc/grub.d/40_custom as described above. I am almost there, but there is GRUB2 panics when I select the non 10.04 partitions, saying "No such partition".

Quote:

Originally Posted by Larry Webb

I would think grub2 is confused with your location. Do the command sudo fdisk -l and post.

Here it is:

Code:

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x6c806c80

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        1992    16000708+  83  Linux
/dev/sda2            1993        5976    32001449+   5  Extended
/dev/sda3   *        5977       22685   134215042+   7  HPFS/NTFS
/dev/sda4           22686       24677    16000740   83  Linux
/dev/sda5            1993        3984    16000708+  83  Linux
/dev/sda6            3985        5976    16000708+  82  Linux swap / Solaris

I am trying to boot /dev/sda1 which has 8.04 (ext3) on it.

Thanks.

Kenny_Strawn · 12-31-2010, 12:26 PM

Yeah, grub.cfg is not supposed to be edited unless there's something seriously wrong with your system (like when I once had to revert a grub change by removing "init=/usr/bin/startx" from the command line).

android-eve · 12-31-2010, 12:37 PM

Quote:

Originally Posted by Larry Webb

Here is a good tutorial grub2

Problem solved. Thanks to the tutorial you pointed at, I realized my mistake: GRUB2 starts counting partitions from 1, not from 0.

Larry Webb · 12-31-2010, 02:06 PM

Glad to help, keep that tutorial handy unless your memory can retain more than mine.