package alsa-base 1.0.19.dfsg-3ubuntu1 failed to install/upgrade: podproces pre-installation script zwrócił kod błędu 2

[trylik]

i was updateing the system (karmic)

ProblemType: Package
Architecture: i386
Card0.Amixer.info:
 Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with AD1981B at irq 17'
   Mixer name : 'Analog Devices AD1981B'
   Components : 'AC97a:41445374'
   Controls : 28
   Simple ctrls : 20
Date: Tue May 26 13:25:58 2009
DistroRelease: Ubuntu 9.10
ErrorMessage: podproces pre-installation script zwrócił kod błędu 2
Package: alsa-base 1.0.19.dfsg-3ubuntu1
PackageArchitecture: all
ProcVersionSignature: Ubuntu 2.6.30-5.6-generic
SourcePackage: alsa-driver
Title: package alsa-base 1.0.19.dfsg-3ubuntu1 failed to install/upgrade: podproces pre-installation script zwrócił kod błędu 2
Uname: Linux 2.6.30-5-generic i686

[Hew (hew)]

Looks like alsa-base 1.0.20+dfsg-1ubuntu3 is uninstallable.

[Hew (hew)]

Bug 380565 seems to describe the same issue with alsa-base 1.0.20+dfsg-1ubuntu1, so perhaps this regression occurred with the 1.0.20 merge.

[David McBride (david-mcbride)]

I can confirm this error, and have identified the cause: there is a typo in the preinst script of this new package.

On my (English, 64-bit) system, I see:

Preparing to replace alsa-base 1.0.19.dfsg-3ubuntu1 (using .../alsa-base_1.0.20+dfsg-1ubuntu1_all.deb) ...
dpkg (subprocess): unable to execute new pre-installation script: Exec format error
dpkg: error processing /var/cache/apt/archives/alsa-base_1.0.20+dfsg-1ubuntu1_all.deb (--unpack):
 subprocess pre-installation script returned error exit status 2
Errors were encountered while processing:
 /var/cache/apt/archives/alsa-base_1.0.20+dfsg-1ubuntu1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Manually unpacking the deb file with `ar`, and untarring the resulting control.tar.gz, I find that the pre-inst script inside the package begins:

\#!/bin/sh

Which is clearly wrong.

Cheers,
David