Public bug reported:

Binary package hint: grub2

The time to procede a "sudo update-grub" during an installation or
deinstallation a kernel is not acceptable long. This happens since
update to version 1.99-4ubuntu1. Additionally the CPU is running at 100%
the whole time.

Output terminal during deinstallation:

laura@ONEIRIC-4GDM32:~$ sudo apt-get purge linux-headers-2.6.39-2 
linux-image-2.6.39-2-generic
[sudo] password for laura: 
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut       
Statusinformationen werden eingelesen... Fertig
Die folgenden Pakete werden ENTFERNT:
  linux-headers-2.6.39-2* linux-headers-2.6.39-2-generic*
  linux-image-2.6.39-2-generic*
0 aktualisiert, 0 neu installiert, 3 zu entfernen und 1 nicht aktualisiert.
Nach dieser Operation werden 214 MB Plattenplatz freigegeben.
Möchten Sie fortfahren [J/n]? 
(Lese Datenbank ... 190179 Dateien und Verzeichnisse sind derzeit installiert.)
Entfernen von linux-headers-2.6.39-2-generic ...
Entfernen von linux-headers-2.6.39-2 ...
Entfernen von linux-image-2.6.39-2-generic ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 2.6.39-2-generic 
/boot/vmlinuz-2.6.39-2-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 2.6.39-2-generic 
/boot/vmlinuz-2.6.39-2-generic
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.39-3-generic
Found initrd image: /boot/initrd.img-2.6.39-3-generic
Found linux image: /boot/vmlinuz-2.6.38-8-generic
Found initrd image: /boot/initrd.img-2.6.38-8-generic
done
The link /vmlinuz.old is a damaged link
Removing symbolic link vmlinuz.old 
 you may need to re-run your boot loader[grub]
The link /initrd.img.old is a damaged link
Removing symbolic link initrd.img.old 
 you may need to re-run your boot loader[grub]
Löschen der Konfigurationsdateien von linux-image-2.6.39-2-generic ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 2.6.39-2-generic 
/boot/vmlinuz-2.6.39-2-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 2.6.39-2-generic 
/boot/vmlinuz-2.6.39-2-generic
laura@ONEIRIC-4GDM32:~$ 

The times of the example are:

- until "Generating grub.cfg ..." = 45 sec
 
- time to provide first pair of kernelimages = 2:30 min

- time  topprovide second pair of kernelimages = 1:30

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: grub-pc 1.99-4ubuntu1
ProcVersionSignature: Ubuntu 2.6.39-3.9-generic 2.6.39
Uname: Linux 2.6.39-3-generic i686
Architecture: i386
Date: Tue May 24 11:47:15 2011
ProcEnviron:
 LANGUAGE=de_DE:en
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 oneiric running-unity

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https://bugs.launchpad.net/bugs/787461

Title:
  sudo update-grub takes extremely time

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