Bug#857870: cups-filters: unused lp modules are still loaded if /etc/default/cups does not exist

[Brian Potkin <claremont102@gmail.com>]

On Sun 10 Nov 2019 at 17:53:58 +0000, Brian Potkin wrote:

> Please would you do the following, preferably on an unstable/testing
> installation:
> 
> 1. Comment out the entries in /etc/modules-load.d/cups-filters.conf.
> 
> 2. Reboot without a parallel port printer attached to the machine.
> 
> 3. Do 'lsmod | grep parport' and 'lsmod | grep lp' and report on which
>    modules are loaded by the kernel.
> 
> 4. Attach a parallel port printer, switch it on  and report on the output
>    of 'lsmod | grep lp'
> 
> 5. Give the kernel version used ('uname -a').

After following my own advice I find that parport_pc and ppdev are
loaded. lp doesn't get loaded, even when the printer is attached.

It seems to me that the ppdev and parport_pc lines in cups-filters.conf
are superfluous with kernel 5.3.0-1. Whether the lp module should be
loaded for everyone is a decision I leave to someone else.

Cheers,

Brian.