Public bug reported: Bug shown after upgrading from 11.10 to 12.04, along with a few other bugs I have submitted.
Not sure on the reasons, but hope the debug info can help you. Dell XPS 15z ProblemType: Package DistroRelease: Ubuntu 12.04 Package: grub-pc 1.99-17ubuntu1 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4 Uname: Linux 3.0.0-12-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 1.94.1-0ubuntu2 Architecture: amd64 Date: Tue Mar 13 09:35:32 2012 ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 127 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) InvalidGrubScript: /etc/default/grub ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=ceecaf84-c136-4883-a750-258d525a3d55 ro quiet splash pcie_aspm=force acpi=noirq i915.semaphores=1 vt.handoff=7 SourcePackage: grub2 Title: package grub-pc 1.99-17ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 127 UpgradeStatus: Upgraded to precise on 2012-03-13 (0 days ago) ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-package precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953866 Title: package grub-pc 1.99-17ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 127 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/953866/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs