freebsd-questions Digest, Vol 871, Issue 3

[Steven Friedrich]

On Wednesday, 17 February 2021 05:52:32 EST freebsd-questions-
request at freebsd.org wrote:
> Subject: Re: Subject: Sound from HDMI (pcm2) using i915kms.ko
> Message-ID: <20210217063131.e72eeaa0b74f498fcf509449 at sohara.org>
> Content-Type: text/plain; charset=US-ASCII
> 
> On Wed, 17 Feb 2021 01:07:24 -0500
> 
> Steven Friedrich <FreeBSD at twc.com> wrote:
> > Message-ID: <1772815.u6MfGjpqfb at freebsd>
> > Content-Type: text/plain; charset="us-ascii"
> > 
> > I am running FreeBSD 12.2-RELEASE-p3 FreeBSD 12.2-RELEASE-p3 r369261
> > FreeBSD amd64
> > I put hw.snd.default_unit=2 in /etc/sysctl.conf to make pcm2 default.
> > cat /dev/sndstat confirms:
> > Installed devices:
> > pcm0: <Realtek ALC671 (Rear Analog)> (play/rec)
> > pcm1: <Realtek ALC671 (Analog)> (play/rec)
> > pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> (play) default
> > No devices installed from userspace.
> > 
> > But no sound is emitted from HDMI connector.
> > 
> > It's my understanding that this requires some support in the video
> > driver, i915kms.ko
> 
>         The device is recognised and attached so that's OK. This may be
> something simple try mixer -f dev/mixer2 for clues.
> 
> --
> Steve O'Hara-Smith <steve at sohara.org>

Thanks for taking the time to respond.

mixer -f /dev/mixer2
Mixer vol      is currently set to 100:100
Mixer pcm      is currently set to 100:100

Also, I am booting KDE Neon 5.21, Kubuntu 20.10 and Mint 20.1 Cinnamon on this 
machine.  On those, ONLY the HDMI audio is discovered by KDE, yet the Realtek 
device shows up in dmesg.