From b64a1ba9d3111a7b3eb3bef96efb84dde15e6eac Mon Sep 17 00:00:00 2001
From: Oleksij Rempel <bug-track@fisher-privat.net>
Date: Tue, 19 Jun 2012 22:21:19 +0200
Subject: [PATCH] ALSA: snd_usb_audio: ignore ctrl errors on QuickCam Pro for
Notebooks
This webcam works mostly ok, exept with skype.
Skype sends lots of ctrl messages to dynamically ajust
record level. If for some reasons it pokes some error
every thing goes broken:
- first pulseaudio blocks sound for all apps
- then video is reseted
- then skype freez
dmesg has lots of messages like:
cannot set freq 16000 to ep 0x86"
Setting ignore_ctl_error=1 fixes this problem.
Signed-off-by: Oleksij Rempel <bug-track@fisher-privat.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/mixer_maps.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index 484603bbeb708..e71fe55cebefa 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -341,6 +341,10 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
.map = audigy2nx_map,
.selector_map = audigy2nx_selectors,
},
+ { /* Logitech, Inc. QuickCam Pro for Notebooks */
+ .id = USB_ID(0x046d, 0x0991),
+ .ignore_ctl_error = 1,
+ },
{ /* Logitech, Inc. QuickCam E 3500 */
.id = USB_ID(0x046d, 0x09a4),
.ignore_ctl_error = 1,
--
2.30.2