It seems I jumped the gun. I still encounter this problem on software update (rather than system startup). I've removed and reinstalled Virtualbox and still encounter the error.
I do have a question re the packaging of virtualbox and virtualbox-qt. For both I have installed version 5.0.18-dfsg-2build1. If I look at Dependencies in synaptic I see Package virtualbox Conflicts virtualbox and Package virtualbox-qy Conflicts virtualbox-qt This doesn't seem quite right to me. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1575954 Title: package virtualbox 5.0.18-dfsg-2build1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1; this happens every startup. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1575954/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs