Lubuntu 17.10 installer crashes with "grub-efi-amd64-signed failed installation /target/"

[Hans Jørgen Hoel]

Booted with 17.10, "try before install" then manually started installer.

Secure boot disabled. Installing without connecting to network.

Must run "sudo swapoff -a" to be able to get more than a few steps into the installer.

From /var/syslog (transcribed):

"lubuntu ubiquity E: Unable to locate package shim-signed"
"lubuntu grub-installer: info: Calling 'apt-install grub-efi-amd64-signed' failed"

After acknowledging the error message popup, the installer crashes.

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

17.10 is long since unsupported and Lubuntu isn't even using Ubiquity anymore (well, except for 18.04, which is not supported for much longer).

[Chris Guiver (guiverc)]

Thank you for taking the time to report this issue and helping to make Ubuntu better. This however is not a bug, as the issue is you are trying to install a release that is past EOL in a condition where it is needs to get extra packages (apt-install) but those packages are no longer available [where expected] due to EOL status.

Lubuntu 17.10 was the 2017-October (yy.mm format) release of Lubuntu, it had a supported life of 9 months, reaching EOL middle 2018. After a release reaches EOL, it's repositories of software are moved from archive.ubuntu.com to old-releases.ubuntu.com (thus the installer can't find it if your system needs packages not included on the install media). You can of course trick this to work, but you should be installing a supported release anyway.

Lubuntu 18.10 (from 2018-October) reaches EOL this Thursday, so 19.04 (2019-April) release if you want the modern LXQt desktop, or 18.04 LTS (2018-April with 3 years support) are your best options.