Audio Problems similar to X86_64 latest kernel in latest Raspberry Pi Appliance Kernel

App_rpt-users
1

Hello folks,
I have just learned, through personal experience, that the latest kernel that just dropped for the Raspberry Pi ASL3 Appliance (6.6.74+rpt-rpi-v8) has similar or same audio problems over a radio audio interface as the latest X86_64 kernels. Recommend that everyone running an ASL3 Pi appliance hold off on running sudo apt update && apt upgrade until the ASL3 team evaluates this and comes up with a fix. An audio example is located at: https://media.fedi.adamm.cc/media_attachments/files/113/924/316/565/808/973/original/9e21cafd2bb47a5b.mp3

Regards,
Adam, VA3AUM

2

Ughhh… I hope not. Testing this out now…

3

Yeah, that gremlin has popped up in the latest Pi image. Everyone running a Pi should immediately:

apt-mark hold linux-image-rpi-v8
apt-mark hold linux-headers-rpi-2712
apt-mark hold linux-headers-rpi-v8
apt-mark hold linux-image-rpi-2712
4

6.6.62 apppears to be the lastest safe kernel on RPi.

5

Hello N8EI.
Thank you for your prompt response in testing, confirming, and providing a temporary fix to this problem for users who haven’t already hosed their systems.
I’m curious though, since I’ve already updated to the problematic kernel, and a hold would do me little good at this point, what would be the proper rollback procedure on a Pi appliance to a known good kernel?
I’ve done this on vanilla Debian X86_64 systems before, but never to a Pi. Yep, I failed to back up the card before upgrading. LOL. I’m usually good with backups, but of course, the one time you don’t…

Thanks,
Adam, VA3AUM

6

Did you mean to write 6.6.69? or 6.6.62?

7

6.6.62, corrected above.

8

I believe I have developed a hotfix for the issue. Please try:

wget -O- https://repo.allstarlink.org/hotfix/asl3-pi12-kernel62-fix.sh | sudo bash

Note: this worked on my system but has not been widely tested. YMMV. Please report back.

9

Hello N8EI,
Thank you! Thank you! You totally saved the day on this one for me! Your BASH script worked. Audio to/from the radio is fixed, and the Pi 4B reports:
Linux ASL3-1 6.6.62+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.6.62-1+rpt1 (2024-11-25) aarch64

Thanks again!
Adam, VA3AUM

10

I’ve run this script on my own personal node with no issues at all, and things are running properly. I’m about to help a friend apply this fix to his node.
I’ll report back.

1 Like
11

Hello,
I applied this fix to a friends node as well and it went off without a hitch.

1 Like
12

A fix has been identified. Put the following in the file /etc/modprobe.d/asl3-snd-usb-audio.conf:

options snd_usb_audio lowlatency=0

Then reboot your system. This is being tested and packaged for a release today.

13

Worked for me. Raspberry Pi 4 using a URIx on ASL3