installation of kernel image failed: Could not find postinst hook script [usr/sbin/update-grub]

I've seen this kind of error in bug 179984 already.
Maybe the comments there might help to solve/debug this.

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

The Intrepid Ibex 8.10 Beta release was most recently announced - http://www.ubuntu.com/testing/intrepid/beta . It contains the 2.6.27 Ubuntu kernel. It would be great if you could test and verify if this is still an issue. The status is being set to Incomplete until we receive further feedback. Thanks.

Continuing from bug https://bugs.launchpad.net/bugs/279432 marked as duplicated by this one.

Let me point out that this happened after upgrade from hardy to Intrepid on AMD64 ... many packages were
removed and never installed new one ... so that's the reason why grub was missing.

Before install grub :
which update-grub
( nothing )

apt-cache policy grub
grub:
  Installed: (none)
  Candidate: 0.97-29ubuntu36
  Version Table: (none)

After install grub :

which update-grub
/usr/sbin/update-grub

apt-cache policy grub
grub:
  Installed: 0.97-29ubuntu36
  Candidate: 0.97-29ubuntu36
  Version Table:
 *** 0.97-29ubuntu36 0
        500 http://www.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

Cheers,

-Angel

Confirmed in intrepid.

A user can remove grub without any problem because it's only a Recommends of the kernel.

If you removed GRUB on yourself, because you use lilo or another GRUB or whatever, a possible solution is to create an executable shellscript in /usr/bin which is named update-grub and does nothing. If you have created one, you will be able to install the new kernel versions.

Faster workaround:

sudo ln -s /bin/true /sbin/update-grub

I've just glued a few more dupes in to this one, various users with lilo rather than grub etc

This keeps happening in the latest linux-image-2.6.24-23-server available for hardy (which, incidentally, is an LTS release, so it's here to stay).

I don't expect to use workarounds for critical packages (like, for instance, the kernel) in order to work and configure OK.

And there is no shortage of linux-image-server / lilo users since grub is not compatible with LVM or RAID (which are common in server setups).

Is no one going to fix a 9 month old bug in the kernel packaging for an LTS release?

People set up to solve this for intrepid and hardy got left behind...

What does LTS stand for?

This bug report was marked as Triaged a while ago but has not had any updated comments for quite some time. Please let us know if this issue remains in the current Ubuntu release, http://www.ubuntu.com/getubuntu/download . If the issue remains, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]