install ubuntu. then run boot-repair in terminal to fix this via liveusb then try to reboot system. i fixed this and now i'm able to boot into ubuntu 20.04.
** Description changed: - Installed Ubuntu 20.04 on a Macbook Pro 16 inch. This error appears - *every* time I try to install anything. - + Installed Ubuntu 20.04 on a Macbook Pro 16 inch. This error appears *every* time I try to install anything. + now i fixed it ProblemType: Package DistroRelease: Ubuntu 20.04 Package: grub-efi-amd64-signed 1.137+2.04-1ubuntu22 ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18 Uname: Linux 5.4.0-14-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu20 Architecture: amd64 Date: Fri Mar 13 23:16:50 2020 ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1 Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu1 PythonDetails: N/A RelatedPackageVersions: - dpkg 1.19.7ubuntu2 - apt 1.9.10 + dpkg 1.19.7ubuntu2 + apt 1.9.10 SourcePackage: grub2-signed Title: package grub-efi-amd64-signed 1.137+2.04-1ubuntu22 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867409 Title: package grub-efi-amd64-signed 1.137+2.04-1ubuntu22 failed to install/upgrade: installed grub-efi-amd64-signed package post- installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1867409/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
