> Out of curiosity - do you know how you had shim-signed installed in > the first place? I wouldn't expect it to be automatically installed > unless you're on an EFI system.
No. I searched the logs for apt & dpkg, but I couldn't find any install date so it has been on the system for more than one year. I'm almost sure I didn't install it myself, unless it came as a dependency from some other package. :-) The installation on this machine has been going through several hardware replacements so it could have been more than 10 years ago. (Or whenever EFI was introduced.) dpkg.log: 2021-05-04 06:04:00 upgrade shim-signed:amd64 1.33+15+1533136590.3beb971-7 1.34+15.4-2 history.log: Start-Date: 2021-05-04 06:03:56 Commandline: /usr/bin/unattended-upgrade Upgrade: libphonon4qt5-data:amd64 (4:4.11.1-3, 4:4.11.1-4), libphonon4qt5-4:amd64 (4:4.11.1-3, 4:4.11.1-4), shim-signed:amd64 (1.33+15+1533136590.3beb971-7, 1.34+15.4-2), phonon4qt5:amd64 (4:4.11.1-3, 4:4.11.1-4), shim-signed-common:amd64 (1.33+15+1533136590.3beb971-7, 1.34+15.4-2), shim-unsigned:amd64 (15.4-2, 15.4-3) Error: Sub-process /usr/bin/dpkg returned an error code (1) End-Date: 2021-05-04 06:04:02 That's all I could find, sorry. However, after reinstalling shim-signed I could successfully remove it. Thanks! /Jörgen
