(Yet Another) HDMI Audio output not working

jcarnat

jcarnat

Hi,

I'm trying to get sound over HDMI when connecting my ThinkPad T480s and my Samsung 4K TV with an HDMI cable. But no sound gets to the TV.
I've read and try things from (Handbook) Chapter 9. Multimedia, (Wiki) Sound & Audio and half a dozen various forum & blog posts but I can't have the sound work through HDMI.

Here's what I did to switch to HDMI output:
$ cat /dev/sndstat
Installed devices:
pcm0: <Realtek ALC257 (Analog 2.0+HP/2.0)> (play/rec) default
pcm1: <Realtek ALC257 (Right Analog Mic)> (rec)
pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> (play)
No devices installed from userspace.
$ mixer -d pcm2
default_unit: 0 -> 2
pcm2:mixer: <Intel Kaby Lake (HDMI/DP 8ch)> on hdaa1 (play) (default)
vol = 0.50:0.50 pbk
pcm = 0.50:0.50 pbk
$ cat /dev/sndstat
Installed devices:
pcm0: <Realtek ALC257 (Analog 2.0+HP/2.0)> (play/rec)
pcm1: <Realtek ALC257 (Right Analog Mic)> (rec)
pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> (play) default
No devices installed from userspace.
Click to expand...
I checked the volumes with mixertui, DSBmixer and GTK-mixer to ensure it was neither mute nor low.

Here are the modules and audio plugins that are loaded:
3 1 0xffffffff82718000 5b18 sysctlinfo.ko
4 1 0xffffffff8271f000 3368 sysctlbyname_improved.ko
8 1 0xffffffff8380c000 1e2228 i915kms.ko
9 2 0xffffffff839ef000 85090 drm.ko
15 1 0xffffffff83a96000 4388 acpi_video.ko
42 2 0xffffffff83d9d000 e5b0 snd_uaudio.ko
45 1 0xffffffff83db9000 24a8 snd_driver.ko
46 1 0xffffffff83dbc000 3200 snd_als4000.ko
47 1 0xffffffff83dc0000 41e8 snd_atiixp.ko
48 1 0xffffffff83dc5000 31f0 snd_cs4281.ko
49 1 0xffffffff83dc9000 5490 snd_envy24.ko
50 3 0xffffffff83dcf000 2110 snd_spicds.ko
51 1 0xffffffff83dd2000 4670 snd_envy24ht.ko
52 1 0xffffffff83dd7000 2230 snd_fm801.ko
53 1 0xffffffff83dda000 5508 snd_hdspe.ko
54 1 0xffffffff83de0000 7ce0 snd_maestro3.ko
55 1 0xffffffff83de8000 f1d0 snd_neomagic.ko
56 1 0xffffffff83df8000 4230 snd_solo.ko
57 1 0xffffffff83dfd000 3250 snd_t4dwave.ko
58 1 0xffffffff83e01000 31f0 snd_via82c686.ko
59 1 0xffffffff83e05000 4200 snd_vibes.ko
Click to expand...

Here's what `sysctl dev.pcm` outputs:
dev.pcm.2.mode: 3
dev.pcm.2.bitperfect: 0
dev.pcm.2.buffersize: 65536
dev.pcm.2.play.vchanformat: s16le:2.0
dev.pcm.2.play.vchanrate: 48000
dev.pcm.2.play.vchanmode: passthrough
dev.pcm.2.play.vchans: 1
dev.pcm.2.play.32bit: 24
dev.pcm.2.%iommu:
dev.pcm.2.%parent: hdaa1
dev.pcm.2.%pnpinfo:
dev.pcm.2.%location: nid=3
dev.pcm.2.%driver: pcm
dev.pcm.2.%desc: Intel Kaby Lake (HDMI/DP 8ch)
dev.pcm.1.mode: 5
dev.pcm.1.bitperfect: 0
dev.pcm.1.buffersize: 65536
dev.pcm.1.rec.vchanformat: s16le:2.0
dev.pcm.1.rec.vchanrate: 48000
dev.pcm.1.rec.vchanmode: fixed
dev.pcm.1.rec.vchans: 1
dev.pcm.1.rec.autosrc: 2
dev.pcm.1.rec.32bit: 24
dev.pcm.1.%iommu:
dev.pcm.1.%parent: hdaa0
dev.pcm.1.%pnpinfo:
dev.pcm.1.%location: nid=25
dev.pcm.1.%driver: pcm
dev.pcm.1.%desc: Realtek ALC257 (Right Analog Mic)
dev.pcm.0.mode: 7
dev.pcm.0.bitperfect: 0
dev.pcm.0.buffersize: 65536
dev.pcm.0.rec.vchanformat: s16le:2.0
dev.pcm.0.rec.vchanrate: 48000
dev.pcm.0.rec.vchanmode: fixed
dev.pcm.0.rec.vchans: 1
dev.pcm.0.rec.autosrc: 2
dev.pcm.0.rec.32bit: 24
dev.pcm.0.play.vchanformat: s16le:2.0
dev.pcm.0.play.vchanrate: 48000
dev.pcm.0.play.vchanmode: fixed
dev.pcm.0.play.vchans: 2
dev.pcm.0.play.32bit: 24
dev.pcm.0.%iommu:
dev.pcm.0.%parent: hdaa0
dev.pcm.0.%pnpinfo:
dev.pcm.0.%location: nid=20,33,18
dev.pcm.0.%driver: pcm
dev.pcm.0.%desc: Realtek ALC257 (Analog 2.0+HP/2.0)
dev.pcm.%parent:
Click to expand...

Here's what `sysctl hw.snd` outputs:
hw.snd.maxautovchans: 16
hw.snd.default_unit: 2
hw.snd.default_auto: 0
hw.snd.verbose: 0
hw.snd.vpc_mixer_bypass: 1
hw.snd.feeder_rate_quality: 1
hw.snd.feeder_rate_round: 25
hw.snd.feeder_rate_max: 2016000
hw.snd.feeder_rate_min: 1
hw.snd.feeder_rate_polyphase_max: 183040
hw.snd.feeder_rate_presets: 100:8:0.85 100:36:0.92 100:164:0.97
hw.snd.feeder_eq_exact_rate: 0
hw.snd.feeder_eq_presets: PEQ:16000,0.2500,62,0.2500:-9,9,1.0:44100,48000,88200,96000,176400,192000
hw.snd.basename_clone: 1
hw.snd.compat_linux_mmap: 0
hw.snd.syncdelay: -1
hw.snd.usefrags: 0
hw.snd.vpc_reset: 0
hw.snd.vpc_0db: 45
hw.snd.vpc_autoreset: 1
hw.snd.timeout: 5
hw.snd.latency_profile: 1
hw.snd.latency: 2
hw.snd.report_soft_matrix: 1
hw.snd.report_soft_formats: 1
Click to expand...

Here's the pcm related bits of dmesg booted verbose:
pcm3: detached
pcm0: <Realtek ALC257 (Analog 2.0+HP/2.0)> at nid 20,33 and 18 on hdaa0
pcm0: Playback:
pcm0: Stream cap: 0x00000001 PCM
pcm0: PCM cap: 0x000e0060 16 20 24 bits, 44 48 KHz
pcm0: DAC: 2
pcm0:
pcm0: nid=20 [pin: Speaker (Fixed)]
pcm0: + <- nid=2 [audio output] [src: pcm]
pcm0:
pcm0: nid=33 [pin: Headphones (Black Jack)]
pcm0: + <- nid=2 [audio output] [src: pcm]
pcm0:
pcm0: Record:
pcm0: Stream cap: 0x00000001 PCM
pcm0: PCM cap: 0x000e0560 16 20 24 bits, 44 48 96 192 KHz
pcm0: ADC: 7
pcm0:
pcm0: nid=7 [audio input]
pcm0: + <- nid=36 [audio selector] [src: monitor]
pcm0: + <- nid=18 [pin: Mic (Fixed)] [src: monitor]
pcm0:
pcm0: Master Volume (OSS: vol): -65/0dB
pcm0: +- ctl 1 (nid 2 out): -65/0dB (88 steps)
pcm0: +- ctl 8 (nid 20 in ): mute
pcm0: +- ctl 14 (nid 33 in ): mute
pcm0:
pcm0: PCM Volume (OSS: pcm): -65/0dB
pcm0: +- ctl 1 (nid 2 out): -65/0dB (88 steps)
pcm0: +- ctl 8 (nid 20 in ): mute
pcm0: +- ctl 14 (nid 33 in ): mute
pcm0:
pcm0: Microphone2 Volume (OSS: monitor): 0/30dB
pcm0: +- ctl 3 (nid 7 in 0): -17/30dB (64 steps) + mute
pcm0: +- ctl 6 (nid 18 out): 0/30dB (4 steps)
pcm0:
pcm0: Recording Level (OSS: rec): -17/30dB
pcm0: +- ctl 3 (nid 7 in 0): -17/30dB (64 steps) + mute
pcm0: +- ctl 6 (nid 18 out): 0/30dB (4 steps)
pcm0:
pcm0: Mixer "vol":
pcm0: Mixer "pcm":
pcm0: Mixer "speaker":
pcm0: Mixer "rec":
pcm0: Mixer "ogain":
pcm0: Mixer "monitor":
pcm0: Playback channel set is: Front Left, Front Right,
pcm0: Playback channel matrix is: 2.0 (unknown)
pcm0: Automatically set rec source to: monitor
pcm0: Recording channel set is: Front Left, Front Right,
pcm0: Recording channel matrix is: 2.0 (unknown)
pcm1: <Realtek ALC257 (Right Analog Mic)> at nid 25 on hdaa0
pcm1: Record:
pcm1: Stream cap: 0x00000001 PCM
pcm1: PCM cap: 0x000e0560 16 20 24 bits, 44 48 96 192 KHz
pcm1: ADC: 8
pcm1:
pcm1: nid=8 [audio input]
pcm1: + <- nid=35 [audio mixer] [src: speaker, mic]
pcm1: + <- nid=25 [pin: Mic (Black Jack)] [src: mic]
pcm1: + <- nid=29 [beep widget] [src: speaker]
pcm1:
pcm1: Microphone Volume (OSS: mic): 0/30dB
pcm1: +- ctl 10 (nid 25 out): 0/30dB (4 steps)
pcm1: +- ctl 22 (nid 35 in 1): mute
pcm1:
pcm1: Speaker/Beep Volume (OSS: speaker)
pcm1: +- ctl 25 (nid 35 in 4): mute
pcm1:
pcm1: Recording Level (OSS: rec): -17/30dB
pcm1: +- ctl 4 (nid 8 in 0): -17/30dB (64 steps) + mute
pcm1: +- ctl 10 (nid 25 out): 0/30dB (4 steps)
pcm1: +- ctl 22 (nid 35 in 1): mute
pcm1: +- ctl 25 (nid 35 in 4): mute
pcm1:
pcm1: Mixer "mic":
pcm1: Mixer "rec":
pcm1: Recording channel set is: Front Left, Front Right,
pcm1: Recording channel matrix is: 2.0 (disconnected)
pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> at nid 3 on hdaa1
pcm2: Playback:
pcm2: Stream cap: 0x00000005 AC3 PCM
pcm2: PCM cap: 0x001a07f0 16 24 32 bits, 32 44 48 88 96 176 192 KHz
pcm2: DAC: 2
pcm2:
pcm2: nid=3 [pin: Digital-out (Jack)]
pcm2: + <- nid=2 [audio output] [src: pcm]
pcm2:
pcm2: Master Volume (OSS: vol): 0/0dB
pcm2: +- ctl 1 (nid 3 in ): mute
pcm2:
pcm2: PCM Volume (OSS: pcm): 0/0dB
pcm2: +- ctl 1 (nid 3 in ): mute
pcm2:
pcm2: Mixer "vol":
pcm2: Mixer "pcm":
pcm2: Soft PCM mixer ENABLED
pcm2: Playback channel matrix is: unknown, assuming 7.1 (disconnected)
Click to expand...

What would I forget doing to enable HDMI audio output?

Thanks.
 
Following.
P.s. i have T480 but could not make hdmi sound go trough as well ... even after editing /boot/device.hints
Even tried to boot with HDMI attached but nothing ...
 
jcarnat said:
Hi,

I'm trying to get sound over HDMI when connecting my ThinkPad T480s and my Samsung 4K TV with an HDMI cable. But no sound gets to the TV.
I've read and try things from (Handbook) Chapter 9. Multimedia, (Wiki) Sound & Audio and half a dozen various forum & blog posts but I can't have the sound work through HDMI.

Here's what I did to switch to HDMI output:

I checked the volumes with mixertui, DSBmixer and GTK-mixer to ensure it was neither mute nor low.

Here are the modules and audio plugins that are loaded:


Here's what `sysctl dev.pcm` outputs:


Here's what `sysctl hw.snd` outputs:


Here's the pcm related bits of dmesg booted verbose:


What would I forget doing to enable HDMI audio output?

Thanks.
Click to expand...
Did some digging.

237340 – Unable to make HDMI sound works with HD630

bugs.freebsd.org bugs.freebsd.org
Dont have usb-c to dp so i can not check it.
 
You must log in or register to reply here.
Back
Top