linux no sound no errors using cpal and rodio

[davehorner]

hello,
I decided to checkout the latest ubuntu 24.10 release and I'm having trouble with rodio which relies on cpal.
RustAudio/rodio#173 (comment)

there are two example applications, one that is sdl2 based and another that just uses rdev. the examples work fine on windows.
on linux they are silent. or one example will work while the other does not.

I have quite a bit of time and detail in the notes referenced above. I've tested cpal via:
cargo run --example beep
I had the machine in a state where beep would be silent and exit without error. (while one of the samples worked!)
I rebooted and now beep is working and one sample works but the other does not. Both samples are ultimately using cpal so it is confusing.

I believe this is really something that should bubble up into ubuntu / pulseaudio / pipewire. The failing beep was transient and I would like to reproduce that again.

There are a number of errors that bubble up which I do not know how to resolve once installing pulseaudio and reinstalling pipewire.

I'm not sure the proper channels for going upstream and I'm still trying to nail things down but I would appreciate help closing rodio's 173

[ErikNatanael]

Hi! I cannot reproduce now on Ubuntu Studio 24.10. Do you still have this issue or might it have been an early Ubuntu release bug? Have you tried the jack backend in CPAL to see if it makes a difference?

[davehorner]

when you say you cannot reproduce; did you actually run the applications? if you let me know what you tested and saw no problems with, i would appreciate.

i haven't touched it, planned to if someone shows some interest in trying to nail it down with me.
I will do the work to make the programs easier to test - testing/documenting more and git repo details to come.
notes on jack backend attempts and differences in RustAudio/rodio#173 (comment)

we can communicate more on the issue here or on the new repo I'll create.

[roderickvd]

Gonna ask the naive question if the volume was up and mute off? Since there are no "errors" from opening or writing to a device this does sound (heh) like a system configuration issue.

[davehorner]

It's a good question. It's been long enough that I need to get this reproduced again. Thanks for the comment. I will try to make sure what is reported is still true.