From 34dedd2a83b241ba6aeb290260313c65dc58660e Mon Sep 17 00:00:00 2001 From: Kai-Heng Feng Date: Mon, 10 Aug 2020 21:31:06 +0800 Subject: [PATCH] ALSA: usb-audio: Disable Lenovo P620 Rear line-in volume control 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. Fixes: f8c11eb7da4a ("ALSA: usb-audio: Add support for Lenovo ThinkStation P620") Signed-off-by: Kai-Heng Feng Link: https://lore.kernel.org/r/20200810133108.31580-1-kai.heng.feng@canonical.com Signed-off-by: Takashi Iwai --- sound/usb/mixer_maps.c | 1 + 1 file changed, 1 insertion(+) 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 */ {} }; -- 2.39.5