Where is the correct place to post detailed information about a motherboard that provides only unacceptably low volume with ALSA? I realise that the correct place probably isn't here, but I didn't know where else to ask for a pointer to where I should send the detailed information.

I initially raised the problem on alsa-users:

https://sourceforge.net/p/alsa/mailman/alsa-user/thread/db705c61-87ba-8d66-2... but the suggestions made there led to no progress being made, and I am now as sure as I can be that the issue is not user error.

The motherboard is a Supermicro MBD-X11SAT-F-O, and the basic high-level device information is:

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card 0: PCH [HDA Intel PCH], device 0: ALC888-VD Analog [ALC888-VD Analog] Subdevices: 0/1 Subdevice #0: subdevice #0

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Doc Evans