On Sat, 2013-02-02 at 10:54 +0100, David Henningsson wrote: > On 01/31/2013 07:11 PM, Tanu Kaskinen wrote: > > On Thu, 2013-01-31 at 17:04 +0100, David Henningsson wrote: > >> [Adding Arun, Liam and Feng to CC] > >> > >> On 01/30/2013 12:15 PM, Luke Yelavich wrote: > >>> Got it thanks, applied along with using alsa 1.0.26. > >>> > >>> However, it seems we have another one, and this has produced another, bigger stacktrace, which is attached. Still the PandaBoardES with the same UCM config I sent to the list. > >>> > >> > >> This looks like: https://bugs.freedesktop.org/show_bug.cgi?id=53036 > > > > Yep. > > > >> But can we reconfirm that "PlaybackChannels" or "CaptureChannels" are > >> really required? These are optional within UCM. It might be worth returning stereo if they are not supplied in the UCM configuration. > > > > Required in what sense? UCM itself doesn't require those, but the > > current pulseaudio code requires those values (the assertion is there > > for a reason). It's of course possible to change pulseaudio code if you > > feel like it, but I think it would make useful to improve those > > configuration files. > > I think a better solution than an assert failure would be either > 1) Default to stereo for playback and capture, or > 2) Fall back to not using UCM at all. > > >> None of the files Ubuntu ships today have it, and AFAIU > >> it has not been required in the past (i e PA 2.1). Is there any > >> documentation of this, so if it really is required, we know how to add it? > > > > PA 2.1 didn't have UCM support. > > Ah. Missed that. > > > I don't know why Ubuntu ships any UCM > > configuration files at all, if they have never been tested (at least not > > with PulseAudio). > > They are shipped together with udev rules that set a verb at bootup in > order to have a less messed up mixer OOTB. > > > I'm not aware of any documentation (apart from the little[1] that I > > started to write and never finished). > > This is a major problem with UCM. There is little or no official > documentation, nor official examples of how to write UCM files the right > way. Liam, is there any progress on this issue? > Not yet, but I will write something this week. Marcin has some configs to send me too so we can take them all together upstream. Regards Liam
