On Fri, Apr 24, 2020 at 01:59:39PM +0000, Alexis PM wrote:

>     Thank you very much for your attention.
>    I am afraid that by installing either logind or libpam-elogind,
>    policykit-1 is still being eliminated (and consequently synaptic
>    because of its dependence).

Because we have to have 2 different flavours of policykit (for elgoind and for
consolekit), apt finds resolving these dependencies difficult. You have to give
it a bit of help.

If you specify 'apt install libpam-elogind policykit-1' that should switch the
polkit backend libraries without removing things you still want.

Mark