package linux-image-2.6.31-20-386 2.6.31-20.58 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[Somaprasad]

Binary package hint: initramfs-tools

I updated my Ubuntu 9.1 and in the grub it shows two normal boot options namely Ubuntu 9.1and ubuntu 2.6.31-20 and recovery mode of both but i can't boot from the updated grub. it boots only from the older grub option. when i tried to boot from the updated grub option this error message is displayed.
"Kernel panic not syncing" followed by some other datas. recently i updated the software packages and then there is a option which says it can be marked for installation. i downloaded the file but during the installation process it became stuck. nothing is being installed. after that i tried installing the linux image using terminal. but it also get stuck.

now the result is that i can't install any of the software which is supported by ubuntu and i can't access to the synaptic package manager.

when i try to access the synaptic package manager it shows the error message as shown below

E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.
E: _cache->open() failed, please report.

ProblemType: Package
Architecture: i386
Date: Wed Mar 31 08:44:47 2010
DistroRelease: Ubuntu 9.10
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: fglrx
Package: linux-image-2.6.31-20-386 2.6.31-20.58
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: initramfs-tools
Title: package linux-image-2.6.31-20-386 2.6.31-20.58 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
Uname: Linux 2.6.31-14-generic i686

[Marc Deslauriers (mdeslaur)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.

[Jean-Baptiste Lallement (jibel)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 540686, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.