Public bug reported:

Binary package hint: update-manager

I use Xubuntu 8.04.1/hardy amd64.
Tonight around 02:00 UTC i downloaded huge hardy update with update-manager and 
installed.
During install update asks me what to do with menu.lst and "install maintainer 
version" selected
and I agreed. After that, I restarted computer.
System failed to boot due to malformed /boot/grub/menu.lst , selecting any menu 
item.

I needed to boot to rescue shell from alternate cd , mount /boot 
and to edit items in menu.lst to previous settings to boot system.

2.6.24-23 kernel will not boot computer (It restart system when getting to X) 
(I use latest fglrx ATI driver, version 8.12)

Previous 2.6.24-22 does boot but only after thi modifications:
Not working:
title           Ubuntu 8.04.1, kernel 2.6.24-22-generic
root            8a3bf030-dc45-4697-9c6e-a8a80a80011a
kernel          /vmlinuz-2.6.24-22-generic 
root=UUID=e37d69c4-3c26-4919-abd3-18fc8723dbcd ro quiet splash
initrd          /initrd.img-2.6.24-22-generic
quiet
Working:

title           Ubuntu 8.04.1, kernel 2.6.24-22-generic
root            (hd0,0)
kernel          /vmlinuz-2.6.24-22-generic root=/dev/md2 ro quiet splash
initrd          /initrd.img-2.6.24-22-generic
quiet

(I use raid device /md2 as root for my installation but you put your HD 
partition where your ubunut is,
like /dev/sda1 or /dev/hda2 etc..)

Also, root uuid it OK but UUID in kernel line is used from first Ubuntu 
installed partition on disk,
instead of right one. After changing root= line system won`t start until root 
line is changed not to reflect
UUID but root partition name.

New 2.6.24-23 kernel does not work even after menu.lst modification. (maybe 
fglrx 8.12 trouble?)
I hope it helps with changing update, before all users or 64-bit xubuntu or all 
ubunut
had failed to start their systems after todays update..

So I assume this is multiple bug but it all happend after update. It could be 
dissolved in 3 bugs:
- Kernel 2.6.24-23 in update does not work / does not work with Ati proprietary 
driver version 8.12 (restart)
- updating menu.lst procedure fails to select proper system partition where 
Ubuntu is installed
  and direct all items in menu.lst to first Ubuntu-installed partition on first 
disk it finds
- Even with proper UUID for /root partition i menu.lst, System fails to boot 
until grub name of partition is 
  put in root= line.

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Failed boot after update [hardy] amd64 -2.6.24-23 , fglrx
https://bugs.launchpad.net/bugs/315338
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