Anyone's (Focusrite Scarlett Solo 3rd Gen) Interface's output randomly going silent in GNU/LINUX?

[dfira]

The problem:

• It seems to go silent right when some kind of event happens (often, but not always), like a play/pause or loop reset.
  
  Every application, Pulseaudio and JACK etc still show audio flowing in the meters.
  
  Recording INPUT is fine, no problems. Only sound to the output is silent.
  
  Hitting direct monitoring lets me hear my microphone, so the physical audio outs are fine.
  
  I need to trigger it one way or another to get sound to output again

Here's what I've tried:

• Changing the cable
  
  Changing the USB port
  
  Changing the kernel (I have not tried it on a machine other than Linux)
  
  Disabling USB autosuspend

Here are the triggers to get it to work again:

• Have another app request access to the output (But important, must close down the current audio stream first)
  
  This script:

  Code: Select all

  #!/usr/bin/bash
  SEARCH="Focusrite-Novation" 
  DEVICE=$(lsusb | grep ${SEARCH} | awk '{print "/dev/bus/usb/"$2"/"$4}' | sed 's/://')
  sudo python3 << EOT
  import fcntl, sys, os, subprocess
  USBDEVFS_RESET = ord('U') << (4*2) | 20
  fd = os.open('${DEVICE}', os.O_WRONLY)
  if fd < 0: sys.exit(1)
  fcntl.ioctl(fd, USBDEVFS_RESET, 0)
  os.close(fd)
  sys.exit(0)
  EOT
  

  Plugging in the cable again

The triggering will exhibit some kind of digital scratch/click/pop sound and that's how I know things are good again.

Any ideas?