package gdm 2.32.1-0ubuntu3.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 10

[LundLinux]

Binary package hint: gdm

I removed gdm, ubuntu-desktop and something else and installed lightdm. Then I removed lightdm and installed gdm and ubuntu-desktop again.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: gdm 2.32.1-0ubuntu3.1
ProcVersionSignature: Ubuntu 2.6.38-9.43-generic-pae 2.6.38.4
Uname: Linux 2.6.38-9-generic-pae i686
NonfreeKernelModules: nvidia
AptOrdering:
 ubuntu-desktop: Remove
 sabayon: Remove
 gdm-guest-session: Remove
 gdm: Remove
Architecture: i386
Date: Thu May 12 18:22:49 2011
ErrorMessage: subprocess installed pre-removal script returned error exit status 10
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
SourcePackage: gdm
Title: package gdm 2.32.1-0ubuntu3.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 10
UpgradeStatus: Upgraded to natty on 2011-04-12 (30 days ago)