[Lenovo ThinkPad T410s, Intel IbexPeak HDMI, Digital Out, HDMI] No sound at all

[Ramon Machado]

ThinkPad T410s. No audio from DisplayPort. Can't even select it as the audio source.
Video works fine

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: voorhees 857 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Aug 20 21:46:38 2020
InstallationDate: Installed on 2020-08-04 (16 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel successful
Symptom_Card: Built-in Audio - HDA Intel
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: voorhees 857 F.... pulseaudio
Symptom_Jack: Digital Out, HDMI
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: No sound at all
Title: [2901A3U, Intel IbexPeak HDMI, Digital Out, HDMI] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/07/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET38WW (1.16 )
dmi.board.name: 2901A3U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6UET38WW(1.16):bd06/07/2010:svnLENOVO:pn2901A3U:pvrThinkPadT410s:rvnLENOVO:rn2901A3U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T410s
dmi.product.name: 2901A3U
dmi.product.version: ThinkPad T410s
dmi.sys.vendor: LENOVO

[Daniel Letzeisen (dtl131)]

[ 4.722425] snd_hda_codec_hdmi hdaudioC0D3: No i915 binding for Intel HDMI/DP codec
[ 4.722861] hdaudio hdaudioC0D3: Unable to bind the codec

[Daniel Letzeisen (dtl131)]

Try to load the i915 module early:

echo "i915" | sudo tee -a /etc/initramfs-tools/modules
sudo update-initramfs -u -k all

See if HDMI/DP audio is available after reboot.