package gdm (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 128

[Esbjörn Blomquist]

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ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: gdm (not installed)
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
Uname: Linux 3.2.0-30-generic x86_64
ApportVersion: 2.0.1-0ubuntu13
AptOrdering: gdm: Purge
Architecture: amd64
Date: Tue Sep 18 17:27:56 2012
ErrorMessage: subprocess installed post-removal script returned error exit status 128
SourcePackage: gdm
Title: package gdm (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 128
UpgradeStatus: Upgraded to precise on 2012-09-18 (0 days ago)