------- Original Message ------- On Friday, August 26th, 2022 at 08:05, Takashi Iwai <tiwai@xxxxxxx> wrote: > > This option is passed per card instance, as the driver may hold > multiple cards. Check your /proc/asound/cards. The first argument of > quirk_flags is applied to the first USB-audio card, the second to the > second USB audio device, and so on. > > At best, give alsa-info.sh output before and after applying the > quirk. Run the script with --no-upload option and attach the > outputs. > > And, as a reference, you can see the existing quirk tables in > sound/usb/quirks.c. > > > Takashi Not sure why it failed before (didn't look further then, so possibly PEBKAC) but as you suggested, this works now (tested on debian's 5.19 kernel): # modprobe snd_usb_audio vid=0x2522 pid=0x0007 quirk_flags=0x10000 Confirmed that setting a quirk_alias also works: # grep -A 1 "0x054c, 0x0b8c" linux/sound/usb/quirks.c DEVICE_FLG(0x054c, 0x0b8c, /* Sony WALKMAN NW-A45 DAC */ QUIRK_FLAG_SET_IFACE_FIRST), # modprobe snd_usb_audio quirk_alias=25220007:054c0b8c I've added a patch for quirks.c to make this default behaviour for this device. Looking at the Arch bug report at https://bugs.archlinux.org/task/70636, it's likely similar behaviour may be needed for pid=0009 (LH Labs Geek Pulse X 1V5) but I have no way of testing this. Added the reporter in CC. Thanks, Lennert
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