This bug was fixed in the package dkms - 2.6.1-4ubuntu2.1
--------------- dkms (2.6.1-4ubuntu2.1) disco; urgency=medium
* Do not invoke dkms_autoinstaller from /etc/kernel/header_postinst.d/dkms with redirection to /dev/null (LP: #1827697), this caused debconf dialog to not be shown.
-- Julian Andres Klode <email address hidden> Fri, 17 May 2019 12:56:47 +0200
This bug was fixed in the package dkms - 2.6.1-4ubuntu2.1
---------------
dkms (2.6.1-4ubuntu2.1) disco; urgency=medium
* Do not invoke dkms_autoinstaller from /etc/kernel/ header_ postinst. d/dkms
with redirection to /dev/null (LP: #1827697), this caused debconf dialog
to not be shown.
-- Julian Andres Klode <email address hidden> Fri, 17 May 2019 12:56:47 +0200