At Tue, 13 Oct 2009 21:52:02 -0600, Robert Hancock wrote: > > On Tue, Oct 13, 2009 at 3:40 AM, <LoganLi@xxxxxxxxxxxxxx> wrote: > >> >> > What is the problem, specifically? > >> >> > >> >> With the latest patch I do get the optical output lighting > >> up and the > >> >> receiver detects a PCM signal, but it seems to be just > >> silence coming > >> >> through. (In previous iterations the SPDIF digital converter wasn't > >> >> being enabled automatically so it didn't get even that far.) > >> > > >> > You can fiddle with hda-verb to issue digital-converter verbs. > >> > Possibly you need to flip the digital-enable bit to send > >> the values... > >> > >> Well, I think I tried all combinations of the flags on the digital > >> converter in hda_analyzer without any luck. I'm assuming it's > >> something else (presumably codec-specific) that hda_analyzer doesn't > >> know about.. > >> > > > > Hi, Robert > > We cannot duplicate bug of SPDIF Out cannot work on VT1828S board. > > You said it's fine in Windows, right? > > Ahh, I see the problem. I think it's related to what we were talking > about with the second SPDIF output: If I play back on subdevice 1 I > don't get any output. But if I force playing on substream 1 instead of > the default 0 (i.e. hw:0,1,1) then I get audio. I'm assuming that > substream 0 is the codec's HDMI output (which actually doesn't exist > on this motherboard). > > It appears whether or not the "iec958" alias that PulseAudio uses when > selecting "Output Digital Stereo" profile actually ends up using > substream 1 instead of 0 is based on luck. as it sometimes works and > sometimes doesn't. Having different substreams go different places is > pretty non-intuitive and it seems software doesn't expect this > behavior. I think that the SPDIF and HDMI outputs really should be > separate subdevices (i.e. hw:0,1 and hw:0,2 or something) instead, > unless something makes this impossible. If the aliases for iec958 and > hdmi were set up to point to the correct subdevice then everything > would work as it should.. Yes, it's possible to assign two different devices if the pin-config of each digital output is set up properly for SPDIF and HDMI. It won't be too difficult to fix, but I have little time now. BTW, I'll be off from tomorrow for a while (two weeks) to attend conferences in Tokyo and a few days battery-charging there. So replies will be delayed. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
