update-grub hung during upgrade, blocked reading from stdin

[Matt Zimmerman]

Binary package hint: grub

While installing a large-ish round of Lucid updates, the upgrade hung here:

Setting up kexec-tools (1:2.0.1-1ubuntu1) ...
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
Found kernel: /boot/vmlinuz.old
Found kernel: /boot/vmlinuz-2.6.32-13-generic
Found kernel: /boot/vmlinuz-2.6.32-12-generic
Found kernel: /boot/vmlinuz-2.6.32-10-generic
Found kernel: /boot/vmlinuz-2.6.32-9-generic
Found kernel: /boot/vmlinuz-2.6.32-8-generic
Found kernel: /boot/vmlinuz-2.6.32-7-generic
Found kernel: /boot/vmlinuz-2.6.31-14-generic
Found GRUB 2: /boot/grub/core.img
Found kernel: /boot/memtest86+.bin

## hung here

ps showed:

 6776 pts/7 S+ 0:00 | \_ /usr/bin/perl -w /usr/share/debconf/frontend /var/lib/dpkg/info/kexec-tools.postinst configure 1:2.0.1-0ubuntu4
 6784 pts/7 S+ 0:00 | \_ /bin/sh /var/lib/dpkg/info/kexec-tools.postinst configure 1:2.0.1-0ubuntu4
 6786 pts/7 S+ 0:00 | \_ /bin/bash /usr/sbin/update-grub

and strace showed:
Process 6786 attached - interrupt to quit
read(0,

I had to abort the upgrade with ^C in order to continue.

ProblemType: Bug
Architecture: i386
Date: Wed Feb 17 12:42:23 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/sbin/update-grub
InterpreterPath: /bin/bash
Package: grub 0.97-29ubuntu59
ProcAttrCurrent: unconfined (enforce)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 LC_COLLATE=C
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
ProcVersionSignature: Ubuntu 2.6.32-12.16-generic
SourcePackage: grub
Uname: Linux 2.6.32-12-generic i686

[Matt Zimmerman (mdz)]

After aborting the upgrade and running apt-get -f install, the problem continues to be reproducible. I can't get kexec-tools to configure.