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I have an Ice Lake laptop (Dell 7390 2-in-one) which I am connecting to
a TV over HDMI via a Novoo USB-C multiport adapter. This is not a
Thunderbolt device, it is just USB-C.
It seemed like things used to work fine before I upgraded this system
from Ubuntu 19.10 to 20.04, although I couldn't say for certain at this
point. But I'm having a ton of difficulty getting audio output over
HDMI. Getting it to work requires a lot of retries to reinitialize the
device (either by suspending/resuming the laptop, or plugging/unplugging
the HDMI cable and/or the multiport adapter). It does work sometimes,
but my success rate is very low at this point.
Even when it does work, it's brittle: any change to the output port (to
speaker and back to HDMI, or from stereo to surround and back) will
often break the audio. This fact seems to suggest that the problem
doesn't have anything to do with the low-level initialization of the
HDMI port; I'd be looking at some mid-layer code.
To be clear, there doesn't seem to be any particular symptom, or
anything of interest in the logs, other than an absence of sound output.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.6.0-1010.10-oem 5.6.8
Uname: Linux 5.6.0-1010-oem x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: nbryant 1510 F.... pulseaudio
/dev/snd/pcmC0D9p: nbryant 1510 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon May 18 17:32:11 2020
InstallationDate: Installed on 2020-01-31 (108 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Digital Out, HDMI
Symptom_PulseAudioLog:
May 18 16:36:42 atlantis dbus-daemon[633]: [system] Activating via systemd:
service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service'
requested by ':1.41' (uid=124 pid=1116 comm="/usr/bin/pulseaudio --daemonize=no
--log-target=jo" label="unconfined")
May 18 16:36:53 atlantis systemd[1109]: pulseaudio.service: Succeeded.
May 18 16:37:03 atlantis systemd[1109]: pulseaudio.socket: Succeeded.
Symptom_Type: Sound works for a while, then breaks
Title: [XPS 13 7390 2-in-1, Intel Icelake HDMI, Digital Out, HDMI] fails after
a while
UpgradeStatus: Upgraded to focal on 2020-04-21 (27 days ago)
dmi.bios.date: 03/02/2020
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.1
dmi.board.name: 06CDVY
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 31
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.3.1:bd03/02/2020:svnDellInc.:pnXPS1373902-in-1:pvr:rvnDellInc.:rn06CDVY:rvrA00:cvnDellInc.:ct31:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 7390 2-in-1
dmi.product.sku: 08B0
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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[XPS 13 7390 2-in-1, Intel Icelake HDMI, Digital Out, HDMI] sound rarely works
https://bugs.launchpad.net/bugs/1879401
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