Commit c1051439 authored Sep 20, 2012 by David Henningsson Committed by Takashi Iwai Sep 20, 2012

ALSA: usb - disable broken hw volume for Tenx TP6911

While going through Ubuntu bugs, I discovered this patch being
posted and a confirmation that the patch works as expected.

Finding out how the hw volume really works would be preferrable
to just disabling the broken one, but this would be better than
nothing.

Credit: sndfnsdfin (qawsnews)
BugLink: https://bugs.launchpad.net/bugs/559939


Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent c40bd914

sound/usb/mixer.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1267,6 +1267,13 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void
		/* disable non-functional volume control */
		master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
		break;
		case USB_ID(0x1130, 0xf211):
		snd_printk(KERN_INFO
		"usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
		/* disable non-functional volume control */
		channels = 0;
		break;

		}
		if (channels > 0)
		first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);

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