I get similar error on Ubuntu 16.10 upgrade:
sudo dpkg --configure -a
Setting up console-setup-linux (1.142ubuntu5) ...
update-alternatives: error: alternative path /etc/console-setup/vtrgb.vga
dpkg: error processing package console-setup-linux (--configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
Any workarounds? (The upgrade was otherwise OK)
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package console-setup 1.70ubuntu5 failed to install/upgrade:
subprocess installed post-installation script returned error exit
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