| Message ID | 20200810133108.31580-1-kai.heng.feng@canonical.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ALSA: usb-audio: Disable Lenovo P620 Rear line-in volume control | expand |
On Mon, 10 Aug 2020 15:31:06 +0200, Kai-Heng Feng wrote: > > The USB device (0x17aa:0x1046) that support Lenovo P620 rear panel > line-in claim to support volume control, but it doens't seem to have an > AMP, so when line-in volume lowers below 80, nothing gets recorded > anymore. > > Disable the volume control to workaround the issue. > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Thanks, applied. Takashi
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c index c369c81e74c4..5b43e9e40e49 100644 --- a/sound/usb/mixer_maps.c +++ b/sound/usb/mixer_maps.c @@ -371,6 +371,7 @@ static const struct usbmix_name_map asus_rog_map[] = { }; static const struct usbmix_name_map lenovo_p620_rear_map[] = { + { 19, NULL, 2 }, /* FU, Volume */ { 19, NULL, 12 }, /* FU, Input Gain Pad */ {} };
The USB device (0x17aa:0x1046) that support Lenovo P620 rear panel line-in claim to support volume control, but it doens't seem to have an AMP, so when line-in volume lowers below 80, nothing gets recorded anymore. Disable the volume control to workaround the issue. Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> --- sound/usb/mixer_maps.c | 1 + 1 file changed, 1 insertion(+)