No sound on Line Out - MX 21.1 KDE [Solved]

[towwire]

Forgot, I think there are sound setting in your monitor to adjust analog sound. You might want to look at that first before anything else.

[DMLinux]

You show your 'Monitor-1: HDMI-2 res: 1920x1080 hz: 60 dpi: 102 size: 476x268mm (18.7x10.6").

You are dual booting with Windows. You show "ASUS VA229(Intel(R) Display Audio). I don't know if that is your analog-stereo connection or if Windows is using the sound thru HDMI, not analog-stereo?
The only way that I can think is to boot into Windows and while playing some sound is to disconnect your analog connection. If sound still plays then the sound is coming thru your HDMI connection.

By what you posted you have:

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output:hdmi-stereo-extra1: Digital Stereo (HDMI 2) Output (sinks: 1, sources: 0, priority: 5700, available: yes)

plus

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hdmi-output-1: HDMI / DisplayPort 2 (type: HDMI, priority: 5800, latency offset: 0 usec, available)
                        Properties:
                                device.icon_name = "video-display"
                                device.product.name = "ASUS VA229"
                        Part of profile(s): output:hdmi-stereo-extra1, output:hdmi-stereo-extra1+input:analog-stereo

You can change Configuration tab options, enable HDMI instead of analog to test on MX.

Oops! Sorry for not being properly specific. I am using a standard 1/8 inch stereo audio cable for the speakers. This monitor does not support HDMI audio.

[towwire]

I understood what cable you are using.

Well I was going by this Asus VA-229 monitor. I downloaded the manual from here.
https://dlcdnets.asus.com/pub/ASUS/LCD% ... 80603A.pdf

From the manual. Chapter 3: General Instruction.
• Volume: Adjusts the output volume level.
• Mute: Mute: the output volume.
• Source: Adjusts audio source to “Line In” or “HDMI” (only available for HDMI input).

I would still check the monitor setting to up the volume if nothing else.
I have an ASUS_VG279Q1A but mine only has a headset jack coming thru the HDMI sound.

[DMLinux]

I understood what cable you are using.

Well I was going by this Asus VA-229 monitor. I downloaded the manual from here.
https://dlcdnets.asus.com/pub/ASUS/LCD% ... 80603A.pdf

From the manual. Chapter 3: General Instruction.
• Volume: Adjusts the output volume level.
• Mute: Mute: the output volume.
• Source: Adjusts audio source to “Line In” or “HDMI” (only available for HDMI input).

I would still check the monitor setting to up the volume if nothing else.
I have an ASUS_VG279Q1A but mine only has a headset jack coming thru the HDMI sound.

Thanks for your many replies, @tomwire. I have the monitor's volume full up. Like I said, it works fine with Windows without changing anything, just rebooting for MX to Win10. After trying a set of powered speakers a couple times, I think I finally understand the problem, but I want to do one more thing to be sure. I am going to sacrifice a spare 1/8 inch stereo cable so that I can check the output power with a multimeter. I know that can be done if the meter has the right range available. I just don't remember how, so I need to dig through some really old manuals to find that information..I am guessing the output level will be lower with Linux that with Win10. I know that sounds weird, but, since I get enough output power for the monitor's speakers to work with Win10, that tells me that there SHOULD be enough power for the speakers to work with Linux. The easy fix would be to just buy an elcheapo set of speakers at Walmart, but this issue has me irritated enough to keep going and do it the hard way because I want to know WHY this is happening.

I am probably the first person ever to want to use built-in monitor speakers with this particular motherboard, because this motherboard has exceptionally high quality sound. In addition to the surround-sound output on the back of the PC, it also has high resolution sound through the headphone jack on the front. I use a set oh Massdrop/Sennheiser HD-6XX headphones for music listening. I just need the speakers to work so that I can hear calendar alarms and other notification sounds,

[DMLinux]

I found this: https://medium.com/@gamunu/enable-high- ... 16f3fe7e1f and ran

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lscpu | grep 'Byte Order'

which told me that I needed to change line #81 in /etc/pulse/daemon.conf from
"default-sample-format = s16le" to "default-sample-format = float32le". I have working sound from all 3 outputs now.

WorkingSound_20220715.jpg