I'm getting similar problem when upgrading Maverick (10.10) to Precise (12.04).
In my case /usr/sbin/update-grub hangs on kexec-tools configuration:
----------------------------------------------------------------------------------------------------
Configuring kexec-tools (1:2.0.2-3ubuntu4) ...
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: /boot/vmlinuz-3.2.0-27-generic
Found kernel: /boot/vmlinuz-2.6.35-32-generic
Found kernel: /boot/vmlinuz-2.6.35-30-generic
Found kernel: /boot/vmlinuz-2.6.35-28-generic
Found kernel: /boot/vmlinuz-2.6.35-27-generic
Found kernel: /boot/vmlinuz-2.6.35-25-generic
Found kernel: /boot/vmlinuz-2.6.35-24-generic
Found kernel: /boot/vmlinuz-2.6.35-23-generic
Found kernel: /boot/vmlinuz-2.6.35-22-generic
Found GRUB 2: /boot/grub/core.img
Found kernel: /boot/memtest86+.bin
----------------------------------------------------------------------------------------------------
Rest of packages are already installed and configured.
Processes list:
----------------------------------------------------------------------------------------------------
root 12636 0.0 0.0 22296 2024 pts/3 Ss 08:22 0:01 |
\_ /bin/bash
root 11084 0.5 1.2 86972 49136 pts/3 S+ 14:46 0:01 |
\_ apt-get -f dist-upgrade
root 11096 0.0 0.3 26824 12956 pts/8 Ss+ 14:47 0:00 |
| \_ /usr/bin/dpkg --status-fd 94 --configure kexec-tools:amd64
root 11097 0.0 0.3 63824 14284 pts/8 S+ 14:47 0:00 |
| \_ /usr/bin/perl -w /usr/share/debconf/frontend
/var/lib/dpkg/info/kexec-tools.postinst configure 1:2.0.1-2ubuntu2.2
root 11104 0.0 0.0 4392 708 pts/8 S+ 14:47 0:00 |
| \_ /bin/sh /var/lib/dpkg/info/kexec-tools.postinst configure
1:2.0.1-2ubuntu2.2
root 11114 0.0 0.0 15176 1980 pts/8 S+ 14:47 0:00 |
| \_ /bin/bash /usr/sbin/update-grub
----------------------------------------------------------------------------------------------------
No disk activity is reported during this state, no CPU load.
There are no encrypted partitions, no LUKS or LVM.
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https://bugs.launchpad.net/bugs/1023950
Title:
Grub update hangs while upgrading Lucid to Precise
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