On Sun, 22 Oct 2017 15:00:12 +0200, Ian W MORRISON wrote: > > On 21 October 2017 at 03:53, Takashi Iwai <tiwai@xxxxxxx> wrote: > > > On Fri, 20 Oct 2017 17:54:45 +0200, > > Pierre-Louis Bossart wrote: > > > > > > On 10/20/17 8:45 AM, Ian W MORRISON wrote: > > > >> I've just noticed that non of the kernels from v4.13 and up run on my > > > >>> Intel Compute Stick (2nd gen Cherry Trail STK1AW32SC) unit and have > > > >>> HDMI LPE audio working. > > > >>> > > > >> > > > >> I have not tested HDMI in a while but I am not aware of any issues > > either. > > > >> There were some patches recently to fix PulseAudio problems and I > > suppose > > > >> some folks used a recent kernel? > > > >> > > > >> > > > > It actually happened since v4.12 as now I get three HDMI LPE Audio > > devices > > > > show up with 'aplay -l' rather than just one. Only 'device 2' works so > > if I > > > > change the sink to use that device I get sound. So basically it can be > > > > fixed in userland however I'm seeing others with different devices also > > > > complaining how audio is broken and I think it is something that many > > users > > > > don't know to fix. Is it worth looking into further or just leaving it > > as a > > > > known issue? > > > > > > I don't think it's a bug, it's a feature... > > > The jack information tells you which device is connected/active, so > > > userspace has all the data needed to select the right routing. > > > > Right, it's a new feature that was recently added, for supporting > > multiple HDMI/DPs. The latest PA should be able to check the jack > > detection of each port, so that it can switch to the actually > > connected one. > > > > > > Takashi > > > > Thanks for the explanation. The PA package for Ubuntu is a bit behind (v8 > for 16.04 LST and v10 for latest 17.10) so it will be easier for users just > to edit /etc/pulse/default.pa in the interim. But is there a way to stop > the multiple and repeating "Audio Port: ASoC: no backend DAIs enabled for > Audio Port" messages in dmesg from occurring without modifying the distro's > kernel? The DAI backend has nothing to do with HDMI LPE audio. It's from ASoC Intel SST driver. You need to set up the routing either via UCM or manually. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
