Can't Disable HDMI Sound Power Saving

[nobody96]

Fresh ubuntu user here.

I have a monitor with built in speakers connected to GTX 1080 gpu via HDMI . I need the sounds to be played instantly because I ( should ) get important, short sound notifications. When the sound card power saving is on, the notification may "play", but it can't be heard, since it takes a second for the sound card to wake up and by the time it's ON, the sound is already finished "playing".
I looked for solutions to no avail. Only config file in sys/module which has a power saving option is for intel sound cards ( which I turned to "0" just to be sure ). Nvidia settings panel doesn't have a power saving option. There is no option to change it in ubuntu sound settings either. I can't see it at least.

If there is a solution to this. Please advise. Thanks.

[#&thj^%]

Not sure I can help, but will you show us this:

grep 10de /lib/udev/rules.d/*

[nobody96]

/lib/udev/rules.d/71-nvidia.rules:SUBSYSTEM=="pci", ATTRS{vendor}=="0x10de", DRIVERS=="nvidia", TAG+="seat", TAG+="master-of-seat"
/lib/udev/rules.d/71-nvidia.rules:ACTION=="bind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x03[0-9]*", TEST=="power/control", ATTR{power/control}="auto"
/lib/udev/rules.d/71-nvidia.rules:ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x040300", TEST=="power/control", ATTR{power/control}="auto"
/lib/udev/rules.d/71-nvidia.rules:ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x0c0330", TEST=="power/control", ATTR{power/control}="auto"
/lib/udev/rules.d/71-nvidia.rules:ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x0c8000", TEST=="power/control", ATTR{power/control}="auto"

[#&thj^%]

Oh brother, they have changed things here, I have a test for you to try if willing, this will have no harm to your system.
Try to add:

options snd_hda_intel power_save=0

To "/etc/modprobe.d/modprobe.conf"
You may also need to disable power saving for the audio card controller:

options snd_hda_intel power_save=0 power_save_controller=N

It's been a few years since I've used it, so keep us posted please...

[nobody96]

I went to the specified folder. The file modprobe.conf was not present, so I made it.
I pasted what you recommended, in two lines, one under the other. Like that:

options snd_hda_intel power_save=0
options snd_hda_intel power_save=0 power_save_controller=N

I saved it and then rebooted. The sound card still goes to sleep/power saving mode. So, sadly, it didn't help.

[#&thj^%]

I wondered if it would still work due to this:

/lib/udev/rules.d/71-nvidia.rules:ACTION=="bind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x03[0-9]*", TEST=="power/control", ATTR{power/control}="auto"

Have you or can you now just remove that file.

sudo rm /etc/modprobe.d/modprobe.conf

One more to try this will get attention at boot via "/etc/default/grub"
Add this to set parameters for kernel modules:

snd_hda_intel power_save=0

If you need help with this just ask.
I'm just being lazy today, to do this:

sudo nano /etc/default/grub

Add that to:

GRUB_CMDLINE_LINUX_DEFAULT="splash=silent resume=/dev/system/swap mitigations=auto snd_hda_intel power_save=0 quiet security=apparmor nosimplefb=1"

Now update grub to the change:

 sudo update-grub

Reboot

[nobody96]

I managed to remove modprobe.conf as root.

I added " snd_hda_intel power_save=0 " to grub . It looked like this:

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xe fefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

snd_hda_intel power_save=0

After reboot, still no improvement.

According to this https://docs.kernel.org/sound/designs/powersave.html There are other devices other than intel that have this power saving setting.I can locate snd_hda_intel in

/sys/module/

Correct me if I'm wrong, but shouldn't a config be here?

/sys/module/snd_hda_codec_hdmi/parameters

There are config files there, but I don't know what they are for.

enable_acomp , enable_all_pins , enable_silent_stream, static_hdmi_pcm

[nobody96]

I saw your edit. Seems like my grub looks different to what you pasted. Should I still edit it the way you wrote?

[#&thj^%]

I managed to remove modprobe.conf as root.

I added " snd_hda_intel power_save=0 " to grub . It looked like this:



After reboot, still no improvement.

I wouldn't have expected that to work, please re-read my previous post, I edited it due to my laziness.

According to this https://docs.kernel.org/sound/designs/powersave.html There are other devices other than intel that have this power saving setting.I can locate snd_hda_intel in
Correct me if I'm wrong, but shouldn't a config be here?

There are config files there, but I don't know what they are for.

Best to leave those be as is...
FTR I just used it in my system and works as expected on my end.

Settings
 └─ Default Configured Node Names:
         0. Audio/Sink    alsa_output.pci-0000_01_00.1.hdmi-stereo
         1. Audio/Source  alsa_input.pci-0000_06_00.6.analog-stereo

 Streams:
        77. Strawberry                                                  
             79. output_FL       > SAMSUNG:playback_FL	[active]
             81. output_FR       > SAMSUNG:playback_FR	[active]

[nobody96]

My grub file now looks like this

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="splash=silent resume=/dev/system/swap mitigations=auto snd_hda_intel power_save=0 quiet security=apparmor nosimplefb=1"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xe fefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

I updated grub in terminal using the command and rebooted.
Still no improvement.

I went to snd_hda_intel to check the parameter file for power saving, and it turned to "1" for some reason. I manually changed it to 0 before.