package grub-efi-amd64 2.02~beta2-9ubuntu1.11 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Derek]

errors from dkms updates

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: grub-efi-amd64 2.02~beta2-9ubuntu1.11
ProcVersionSignature: Ubuntu 4.2.0-35.40~14.04.1-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
NonfreeKernelModules: nvidia_uvm zfs zunicode zcommon znvpair zavl nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
Date: Wed Jul 6 11:11:40 2016
DuplicateSignature: package:grub-efi-amd64:2.02~beta2-9ubuntu1.11:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
ProcCmdLine: BOOT_IMAGE=/ubuntu-14.04@/boot/vmlinuz-4.2.0-35-generic root=ZFS=alpha/ubuntu-14.04 ro boot=zfs rpool=alpha bootfs=alpha/ubuntu-14.04 --verbose nosplash debug
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.14
SourcePackage: grub2
Title: package grub-efi-amd64 2.02~beta2-9ubuntu1.11 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Please post the output of debconf-show grub-pc.

[Derek (derek-0)]

No output... how about this:

# debconf-show grub-efi-amd64
  grub2/linux_cmdline: boot=zfs rpool=alpha bootfs=alpha/ubuntu-14.04
  grub2/device_map_regenerated:
  grub2/kfreebsd_cmdline_default: quiet splash
  grub2/kfreebsd_cmdline:
  grub2/linux_cmdline_default: --verbose nosplash debug