'Twas brillig, and Damian Ivanov at 23/07/13 13:01 did gyre and gimble: > Hey guys, > > udev/systemd/pulseaudio/lirc should provide a maximum amount of > hotplugging, there are dozens of questions and bug reports on the net > about > the creative X-fi USB sound card on Linux. The sound itself works, > also 5.1 channels work though standard is set to stereo. The sound > card has a remote control with it, which is very > difficult to set up, a lot of people don't manage it. Wouldn't it be > much smoother if > a) pulseaudio sets the best available channel configuration for the > card and also the default channels and sample rate - sound rattling ( > http://community.linuxmint.com/hardware/view/7476 )
PulseAudio already reads udev properties on the devices (PULSE_PROFILE_SET) to see if the a specific (i.e. non-probed) profile set is needed for that h/w. It would be relatively trivial to improve that to read e.g. PULSE_PREFERRED_PROFILE_NAME or similar such that a default profile was picked (assuming no other override), but that said all profiles have a built in "priority" calculated in PA, the highest of which is used in the even of no other configuration. So really this is something you can pretty much create with a custom profile-set for the X-fi and add it to the udev rules. (all of this is in PulseAudio and thus should really be directed to that mailing list). As a side note, the udev rules in PA should probably be converted to the hwdb format now I guess (although they are not tooooo large, it's still the new shiny way to do things :D) > b) if udev registers the card set up/recommend/message the user accordingly: > lircd - --device=hw:Pro --driver=alsa_usb How would udev "message the user"? At present there are a few horrible hacky mechanisms in place to do similar udev->userspace stuff (including installing missing packages on plug) such as the system-config-printer stuff. I guess it would be nice to create a slightly more generic udev->userspace communicator protocol/applet for handling things like this for desktop scenarios. Has anyone given this any thought? Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited http://www.tribalogic.net/ Open Source: Mageia Contributor http://www.mageia.org/ PulseAudio Hacker http://www.pulseaudio.org/ Trac Hacker http://trac.edgewall.org/ _______________________________________________ systemd-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/systemd-devel
