------- Original Message ------- On Friday, August 26th, 2022 at 08:05, Takashi Iwai tiwai@suse.de 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