Let me open a dedicated topic for this matter. Desciption of the issue, symptoms With some patches the audio is a bit glitched and the console spits out these “snd_pcm_delay failed” messages Sometimes it does it right away, sometimes after half a minute or more More in detail these are the error …

@mzero Great findings! Amazing work! For every release RPi makes of its kernel, they update this file with the commit hash of their kernel repository: https://github.com/Hexxeh/rpi-firmware/commits/master/git_hash Using these hashes and looking at the state of the code on kernel repo, I found that…

Thanks for your investigations mzero! I will certainly do this, but I am unfortunately at work for the day so it will be a couple of hours.

@mzero Thank you for looking into this! Great analysis! pi@raspberrypi:~ $ dpkg-query -l 'pisound*' 'libasound*' Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Na…

[image] miker2049: I am using a raspberry pi 3B+… maybe its a plus thing? I also suspect it could be related to 3B+, I don’t remember these errors myself when using plain 3B, I will try reproducing it on plain 3B later today.

[image] mzero: dpkg-query -l ‘pisound*’ ‘libasound*’ Here’s what I get: Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Archi…

Hey does look like I am different here! Nothing here for me on “libasound2-dev:armhf”… edit fixed my output to show everything. This also seems to be @anon86906493 's difference with this stuff too Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-ins…

[image] miker2049: Nothing here for me on “libasound2-dev:armhf” The -dev variation packages are needed when you’re building stuff from sources that depend on some package, in this case it looks like me and @mzero built something on our systems that depended on libasound2. :slight_smile: I c…

went ahead and tried apt-getting libasound2-dev, and the errors still persist. The “priority 6 scheduling failed; running at normal priority” at pd boot is now gone, but there are still errors on opening and closing even simple patches… most tellingly perhaps still happens in the Test Audio Midi. B…

Ok so performing the “echo performance |…” command did do something. There are no more errors from Audio Midi Test! But 1.poly.synth.pd is still producing them on opening and closing granted that dsp is on. This screenshot is just after loading and closing that patch multiple times. Always seemi…

Looks like the error reporting is trying to convert the error code to string, assuming it’s an ‘errno’ error code ( http://man7.org/linux/man-pages/man3/errno.3.html ), in this case ‘Device or resource busy’ is equivalent to 16 ( https://github.com/raspberrypi/linux/blob/rpi-4.14.y/include/uapi/asm-gen…

[image] Giedrius: so some place in the code is wrongly interpreting those values and printing these confusing messages. The thing interpreting as errors (libasound2) and the thing printing them (Pd) are doing the right thing: the value returned by snd_pcm_delay is supposed to be an error code…

Snd_pcm_delay failed error

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Snd_pcm_delay failed error

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