(Ubuntu-GNOME 16.10, initial install) package shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Borislav Petrović]

After booting up fresh Ubuntu Gnome install, while configuring steps this error appeared.

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
AptOrdering:
 shim:amd64: Install
 shim-signed:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
BootEFIContents:
 fw
 fwupx64.efi
Date: Fri Oct 14 10:51:47 2016
Df:
 Filesystem 1K-blocks Used Available Use% Mounted on
 /dev/sdb1 114789960 88972224 19963684 82% /
 /dev/sdc 1451056 1451056 0 100% /cdrom
 udev 4017016 0 4017016 0% /dev
 tmpfs 806612 28336 778276 4% /run
EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: efibootmgr: EFI variables are not supported on this system.
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1
 apt 1.3.1
SourcePackage: shim-signed
Title: package shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Steve Langasek (vorlon)]

According to the attached debugging information, the system you were installing on is not a UEFI system, and therefore the shim-signed package should not have been installed on your system. Do you know why installation of shim-signed has been attempted here? Did you expect your system to be installed in UEFI mode?

[Borislav Petrović (chubzor)]

During the installation I got the message about installer being run in UEFI mode and to continue or go back.
I've had Ubuntu 15.10 installed on the laptop which was bought as Win 8 ready machine.

I tried to install and preserve my old files only to have this shim jump out when I started the system.

I've since wiped the disk and made a clean install so I don't know what else to do to help here.

It was unusual to get that message, and it was unusual to get the error.

If you need me to check out a few things or need any further info please tell me. Otherwise you can really close this as it isn't relevant anymore.

[Steve Langasek (vorlon)]

Thanks for following up. Closing as invalid then, since it doesn't sound like we have enough information to diagnose.