Hi On Thu, Sep 11, 2014 at 9:16 AM, Tanu Kaskinen <tanu.kaski...@linux.intel.com> wrote: > On Wed, 2014-09-10 at 12:44 +0200, David Herrmann wrote: >> Hi >> >> On Tue, Sep 9, 2014 at 10:49 AM, Tanu Kaskinen >> <tanu.kaski...@linux.intel.com> wrote: >> > On Wed, 2014-08-27 at 11:47 +0300, Tanu Kaskinen wrote: >> >> On Tue, 2014-08-26 at 14:00 +0200, Lennart Poettering wrote: >> >> > On Tue, 26.08.14 12:17, Tanu Kaskinen (tanu.kaski...@linux.intel.com) >> >> > wrote: >> >> > >> >> > > Hi, >> >> > > >> >> > > If I want to designate some sound card to be shared between seats, >> >> > > then I suppose that sound card shouldn't be assigned to any seats. >> >> > > However, currently /usr/lib/udev/rules.d/71-seat.rules >> >> > > unconditionally tags all sound cards with the "seat" tag. How should >> >> > > this be solved? >> >> > >> >> > What's the rationale here actually? PA doesn't really support "sharing" >> >> > sound cards between multiple seats. >> >> > >> >> > I mean, If this is something generally useful we can see if we can >> >> > support that in the default rules, but I am not seeing it? >> >> >> >> The use case is a car audio system. There are multiple seats, and each >> >> seat can have dedicated audio hardware (e.g. headphones), but there's >> >> also the speaker system that is shared by all seats. >> >> >> >> It's true that PA needs modifications too to support this. We haven't >> >> yet decided how to implement this, but probably we will run PA in system >> >> mode for the shared devices only, and user instances for the per-seat >> >> hardware. The user instances will use the tunnel module to connect to >> >> the hardware that is managed by the system instance. >> > >> > Ping? >> >> Sorry, a lot of people are on vacation.. >> >> I think the right solution for this is to support "TAGS-=seat" in >> udev. That is, the automatic seat-assignment will still be applied, >> but you can revert it in your own udev rules. By dropping the "seat" >> tag, logind will not treat it as 'seated' device. > > Thanks for the reply. The way you put it sounds like udev doesn't > currently support "TAGS-=seat". Is that correct? If so, maybe I'll look > into making a patch at some point, but no promises.
Exactly, it's currently not supported. I wrote a patch and sent it to the ML: [PATCH RFC] udev: allow removing tags via TAG-="foobar" Maybe you can have a look whether this solves your issues. Thanks David _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
