There was a recent discussion about disabling a udev rule to allow use of HDMI audio with nvidia-primenVidia HDMI audio mhwd-prime-powermanagement.rules
Main package for pipewire is now a required dependency of KDE@fabby ’s post to continue using PulseAudio
The pulseaudio.service and socket cannot be stopped to use Pipewire
If system is only detecting one card, the HDMI output(s) are probably supported by the onboard audio codec
I suggest you check if there are any Digital Output profiles available in
pavucontrol --tab=5
and check HDMI is not muted in ALSA controls
amixer --card=0
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profiles available are “Play HiFi Quality Music” and “Off”
It’s on HiFi by default, if I change this to off the only output device is “Dummy Output”
ALSA output:
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',1
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',2
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',3
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',4
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',5
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
All 5 HDMI outputs shown as muted [off] in ALSA
I suggest you unmute all 5 outputs using
alsamixer --card=0
use ← and → to select each output
M to toggle from muted [MM] to unmuted [OO]
and save ALSA settings so HDMI are not muted again when system restarted
sudo alsactl store
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Unmuted and rebooted for good measure, unfortunately this didn’t reveal an HDMI audio device.
On boot I still have to manually do optimus-manager --switch nvidia once I get into KDE, should this be set a more persistent way such that the HDMI is available as the system is booting?
XRaTiX
8 September 2021 15:41
25
For that edit the file
/etc/optimus-manager/optimus-manager.conf
and in startup_mode should be
startup_mode=nvidia
Now everytime you boot the system it should have nvidia mode by default.
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This file doesn’t exist, safe to create with just that value?
XRaTiX
8 September 2021 15:44
27
Yes it safe to create,it should be
[optimus]
startup_mode=nvidia
In case doesn’t work,you can use this as a template.
[optimus]
# This parameter defines the method used to power switch the Nvidia card. See the documentation
# for a complete description of what each value does. Possible values :
#
# - nouveau : load the nouveau module on the Nvidia card.
# - bbswitch : power off the card using the bbswitch module (requires the bbswitch dependency).
# - acpi_call : try various ACPI method calls to power the card on and off (requires the acpi_call dependency)
# - custom: use custom scripts at /etc/optimus-manager/nvidia-enable.sh and /etc/optimus-manager/nvidia-disable.sh
# - none : do not use an external module for power management. For some laptop models it's preferable to
# use this option in combination with pci_power_control (see below).
switching=none
# Enable PCI power management in "integrated" mode.
# This option is incompatible with acpi_call and bbswitch, so it will be ignored in those cases.
pci_power_control=no
# Remove the Nvidia card from the PCI bus.
# May prevent crashes caused by power switching.
# Ignored if switching=nouveau or switching=bbswitch.
show original
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This worked in terms of bringing up the HDMI video on boot, but unfortunately didn’t make audio available.
Fabby
8 September 2021 20:08
29
Can you try on your TV with an HDMI from let’s say your DVD player instead of your monitor, please? (It’s starting to sound like a hardware problem…)
My old Ubuntu system and a Windows system for work use it daily
perused through /lib/udev/rules.d/ but couldn’t make out anything relevant in either the nvidia or sound-card files.
OP has already commented out the udev rule for nVidia audio - see post #21
