By the way, the TV I'm connecting to is an LG C9 running firmware 04.71.25 (current as of this writing) which is further connected to a Sony STR-DH750 via HDMI ARC. I connect the laptop via the TV, not the receiver, and problem persists whether TV is on or off.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1879401 Title: [XPS 13 7390 2-in-1, Intel Icelake HDMI, Digital Out, HDMI] sound rarely works Status in linux package in Ubuntu: Confirmed Bug description: 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. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: nbryant 1510 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-01-31 (108 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) Lsusb: Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 003: ID 8087:0026 Intel Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 13 7390 2-in-1 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1010-oem root=UUID=caffa21a-82f2-4555-a416-67926241525a ro cma=64M pcie_aspm.policy=powersupersave drm.vblankoffdelay=1 video=1600x1200 mem_sleep_default=deep ProcVersionSignature: Ubuntu 5.6.0-1010.10-oem 5.6.8 RelatedPackageVersions: linux-restricted-modules-5.6.0-1010-oem N/A linux-backports-modules-5.6.0-1010-oem N/A linux-firmware 1.187 Tags: focal Uname: Linux 5.6.0-1010-oem x86_64 UpgradeStatus: Upgraded to focal on 2020-04-21 (27 days ago) UserGroups: adm cdrom dip docker lpadmin lxd plugdev sambashare sudo _MarkForUpload: True 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. 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