Bug#883756: dbus-user-session: blocks upgrades; installing dbus-user-session yields a change of the init system

[Felipe Sateler]

(pruninc cc list since this is a regular pulseaudio bug)

On Fri, Dec 8, 2017 at 12:34 PM, Vincent Lefevre <vincent at vinc17.net> wrote:
> On 2017-12-08 11:22:02 -0300, Felipe Sateler wrote:
>> On Thu, Dec 7, 2017 at 10:03 PM, Vincent Lefevre <vincent at vinc17.net> wrote:
>> > On 2017-12-07 18:08:47 +0000, Simon McVittie wrote:
>> >> The recommendation should ideally be something like
>> >> "dbus-user-session | NOT(booted using systemd)", but we don't have the
>> >> syntax to express that.
>> >
>> > How about a new package pulseaudio-no-systemd and a Recommends on
>> > "dbus-user-session | pulseaudio-no-systemd"? This package would
>> > do almost nothing. It could possibly change the configuration to
>> > re-enable autospawn.
>>
>> It would be weird to have two snippets installed, one that enables and
>> the other disables pulseaudio.
>
> Yes. But shouldn't the default be no-autospawn? Then the
> /etc/pulse/client.conf.d/00-disable-autospawn.conf config file
> would no longer be needed, and pulseaudio-no-systemd would just
> add a config file to enable autospawn.

This may work. Could you propose a patch for this scheme? An old patch
of mine that was ultimately not accepted upstream could serve as a
starting point:

https://lists.freedesktop.org/archives/pulseaudio-discuss/2014-November/022696.html

(Remember we need to keep autospawn by default on for nonlinux archs.

>
>> But I don't want to make it unnecessarily difficult either. I'm open
>> to suggestions to improve the current situation, but they must
>> fulfill the following properties:
>>
>> 1. It should use the systemd --user manager by default
>> 1b. We should keep a single place to disable, which would be the
>> systemd --user manager, and thus autospawn needs to be disabled by
>> default.
>> 2. This configuration should not be changed unless explicitly chosen
>> by the admin/user.
>
> pulseaudio-no-systemd could also just ask the user whether he wants
> to enable autospawn.
>
> But you could also see autospawn as being the default configuration
> for sysvinit (where pulseaudio-no-systemd would be installed by
> default). Thus it would not really be a change.
>
> Alternatively, couldn't the PulseAudio client library be smarter,
> i.e. be able to know whether it should autospawn or not by default,
> without the need of a configuration file?

This is a bit too much magic for my taste. I'm not willing to carry a
patch like this if it is not accepted upstream first.

-- 

Saludos,
Felipe Sateler