Hello,
I bought a laptop with integrated sound output (either to speakers or
headphones), and a HDMI output. Attached is the output of `aplay -l`.
Under both PipeWire and PulseAudio, I only get a single output/sink (by
default to the built-in output), but I can get simultaneous output to both:
- under PulseAudio, by adding a `load-module module-alsa-sink
device=hw:0,7` line to the config;
- under PipeWire, by adding a profile to the card to enable both
outputs, which correctly provides two outputs that work fine concurrently.
I was directed to this mailing list after the following discussion:
> It's a kernel ALSA bug if SOF actually must contain enough data for
the driver to figure this out (or at least pass that data on to
userspace to deal with it)
> if [we are] right that hardware itself does not contain the required
data, then it can only be fixed in userspace via a card database
> which is one thing to do, another would be maybe a heuristic rule
that attempts to guess if such cards with analog and digital sub-devices
might be independent
Please tell me if more details are needed—it would be nice if hardware
configurations like mine could be fully supported out of the box ^^
Cheers,
~ ISSOtm
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
