I think you have media problems judging from the number of CDROM errors I see in https://bugs.launchpad.net/ubuntu/+source/initramfs- tools/+bug/688898/+attachment/1762525/+files/Dmesg.txt
** Changed in: initramfs-tools (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/688898 Title: package linux-backports-modules-compat-wireless-2.6.35-2.6.32-25-generic-pae 2.6.32-25.24 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs