I think your suggestion is correct. I used dpkg-reconfigure to re-run shim-signed and a window popped up asking me to disable secure boot. This didn't appear in the original run.
I'm using Ubuntu Gnome 15.10 (updated to 16.04 today), and used the Software Updater app to apply updates. This was the original Ubuntu updater, rather than the new one that now ships with 16.04. I guess this report can now be closed. Thanks for your help. On 21/07/16 21:13, Steve Langasek wrote: > The error in your logs is: > > quit > > Use of uninitialized value $reply in scalar chomp at > /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 66, <GEN0> line 11. > Use of uninitialized value $reply in concatenation (.) or string at > /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 67, <GEN0> line 11. > Use of uninitialized value $reply in split at > /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 68, <GEN0> line 11. > Use of uninitialized value $ret in string eq at > /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 212, <GEN0> line 11. > Use of uninitialized value $_[1] in join or string at > /usr/share/perl5/Debconf/DbDriver/Stack.pm line 111, <GEN0> line 11. > Use of uninitialized value $reply in scalar chomp at > /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 66, <GEN0> line 11. > Use of uninitialized value $reply in concatenation (.) or string at > /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 67, <GEN0> line 11. > Use of uninitialized value $reply in split at > /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 68, <GEN0> line 11. > Use of uninitialized value $val in substitution (s///) at > /usr/share/perl5/Debconf/Format/822.pm line 83, <GEN2> line 8. > Use of uninitialized value $val in concatenation (.) or string at > /usr/share/perl5/Debconf/Format/822.pm line 84, <GEN2> line 8. > > This looks like the install "hung" from your perspective, but the > debconf interface was waiting from input somewhere; and it never got it, > possibly because of a ^C in the terminal. > > What package manager frontend were you using for this upgrade? The > apport-attached information doesn't show this, but only shows that > aptdaemon was used as the backend. > > ** Changed in: shim-signed (Ubuntu) > Status: New => Incomplete > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1605376 Title: package shim-signed 1.17~15.10.1+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1605376/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs