Ubuntu
grub2 package

Grub Can't find Kernel

Asked by Andrew Xavier

Recently I have removed older versions of my kernel, but when I try to access the newest version, grub spits out

error: invalid magic number
error: you need to load the kernel first.

I removed older kernel versions, and updated menu.lst, however all the old kernels still show up at boot. I even ran update-grub and took a look at menu.lst and only the newest kernel is in there. I wonder if the list of kernels at boot is not updating properly for some reason. What could this be?

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Andrew Xavier
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Andrew Xavier (9b8h) said : 		#1

I'm running Ubuntu 11.04 Server.

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actionparsnip (andrew-woodhead666) said : 		#2

There is no menu.lst, Grub2 uses a whole host of config files. If you hold SHIFT at boot and choose an older kernel does it boot

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Andrew Xavier (9b8h) said : 		#3

One of my old kernels (2.6.*) does boot after it automatically fixed the errors in /boot.

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Andrew Xavier (9b8h) said : 		#4

I would like to ultimately use 3.0.0-14, the newest version I have on the system. However for some reason grub won't find it. All the required files are in /boot.

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actionparsnip (andrew-woodhead666) said : 		#5

If you run:

sudo update-grub

What is output?

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Andrew Xavier (9b8h) said : 		#6

    Searching for GRUB installation directory ... found: /boot/grub
    Searching for default file ... found: /boot/grub/default
    Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
    Searching for splash image ... none found, skipping ...
    Found kernel: /vmlinuz-3.2.0-24-generic
    Found kernel: /vmlinuz-3.0.0-20-server
    Found kernel: /vmlinuz-3.0.0-19-server
    Found kernel: /vmlinuz-3.0.0-17-server
    Found kernel: /vmlinuz-3.0.0-16-server
    Found kernel: /vmlinuz-3.0.0-15-server
    Found kernel: /vmlinuz-3.0.0-12-server
    Found kernel: /vmlinuz-2.6.38-12-server
    Found GRUB 2: /boot/grub/core.img
    Found kernel: /memtest86+.bin
    Updating /boot/grub/menu.lst ... done

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actionparsnip (andrew-woodhead666) said : 		#7

If you reboot now, is it ok?

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Andrew Xavier (9b8h) said : 		#8

No, the list of kernels has not been updated.

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Andrew Xavier (9b8h) said : 		#9

I ran this command a number of times before, it appeared based on the output that all was OK but on boot the same old list remained in tact.

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Andrew Xavier (9b8h) said : 		#10

I'm going to try upgrading my system to 12.04 and see how that goes.

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Andrew Xavier (9b8h) said : 		#11

After upgrading grub and my system to the latest version, I was able to solve this problem, and now I'm loading off the latest kernel.