Thanks for your report Please revert xserver-xorg-video-intel to the version fomr the official repository before upgrading.
I'm closing this report because it is not a bug with Ubuntu. ** Changed in: update-manager (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/774594 Title: update to 11.04 i386 - could not calculate the upgrade -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs