Commit b64a1ba9 authored Jun 19, 2012 by Oleksij Rempel Committed by Takashi Iwai Jun 20, 2012

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>

parent 05b9afd5

sound/usb/mixer_maps.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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,

Admin message