Can't use jack audio for sound

Hello.
I want to tune playing sound via jack 3.5mm audio output port instead of hdmi.
I’ve set “hdmi_ignore_edid_audio=1” and “audio_pwm_mode=2” in !Boot.Loader.config/txt (as described here) then rebooted, but sound doesn’t play.
What’s wrong? How to make sound play through jack output?
p.s. Raspberry Pi 4B+, RISC OS 5.28 (direct).

Never tried it myself, but there are a lot of parameters that may or may not be relevant (likely depending on the version of the bootloader and/or OS used and maybe even the Raspberry Pi model):

• dtparam=audio=on
• hdmi_drive=1
• hdmi_ignore_edid_audio=1
• hdmi_force_edid_audio=0

And for improving analogue audio out quality:

• audio_pwm_mode=2
• disable_audio_dither=1

Hello,
I get around the problem by using the 3.5mm jack output of my monitor …
Thanks for parameters inforamtion, to test.

Steffen Huber, thanks but it didn’t help :(
I hear no sound from RISC OS at all both via HDMI and jack 3.5mm.
With your settings (for jack) and with hdmi_drive=2 / hdmi_force_edid_audio=1 (for HDMI).
I hear some noises via jack only on reboot.

Sound works well only in Linux (both via HDMI and jack).
I don’t know what’s wrong with my RISC OS sound :((
I’d like to find a solution of this problem…

It seems like config/txt doesn’t work at all.
When I set hdmi_mode=16 my screen mode stays 1920×1080, not 1024×768.

It seems like config/txt doesn’t work at all.

I don’t know if it’s still a problem these days, but it used to be mandatory that the filnames in the boot partition had to be entirely in uppercase. So CONFIG/TXT would be seen, but config/txt wouldn’t.

Even worse was that, once a file had been named with any lower case characters in, simply renaming it with all upper case wouldn’t solve the problem.

It was to do with extended filename support (rather, lack of it). Anything that can’t be represented in 8.3 upper case (and numerals) requires extended filename support.

Anyone know whether non-extended filenames are still mandatory?

Anyone know whether non-extended filenames are still mandatory?

This wiki entry may be of assistance.

Filename is in uppercase, I just wrote it so here :)

I don’t know if it’s still a problem these days, but it used to be mandatory that the filnames in the boot partition had to be entirely in uppercase. So CONFIG/TXT would be seen, but config/txt wouldn’t.

On this Pi 4 only, the filenames for config/txt and riscos/img are lower case and Cmos is mixed.

I’ve tried another image of RISC OS (original, not “direct”). The result is the same: no sound at all: via HDMI and via jack (I hear only some noises via jack on reboot).

And I tried to name config.txt in upper and lower case in FAT (both cases in FAT is displayed as uppercase in RISC OS, but uppercase name in FAT isn’t opened in RISC OS). RISC OS doesn’t boot when file is absent.

I don’t know what to do else… :(
Both HDMI and jack output works well in Linux.

As has been mentioned, renaming the file won’t help. You’d have to delete it then create a new CONFIG/TXT

Yes, I did so.

How to test CONFIG.TXT?
I tried to set hdmi_mode=16 with hdmi_group=2 hoping to boot with 1024×768 screen mode. But it boots with 1920×1080.

When you set these settings does it boot with 1024×768?

Yo! That’s a real crap! I always used the 2nd HDMI port for output (because it’s more handy – it doesn’t rub on the power cable). And now I just reconnected cable to the 1st HDMI port. And all sounds began to work. Sound via HDMI and even via jack.
Just facepalm, no comments…