[alsa-devel] [PATCH] usb-audio: ignore-quirk for HP Wireless Audio

[Eldad Zack]

As Joe Cooper <swelljoe at gmail.com> reported, "On most HP Envy laptops
the snd-usb-audio module causes the system to become unresponsive and
Gnome Shell 3 to crash.".
See also:
 http://mailman.alsa-project.org/pipermail/alsa-devel/2012-December/057729.html

Add a quirk to ignore this device (for now) to solve the instability
issue and allow other USB audio devices to be used.

Reported-by: Joe Cooper <swelljoe at gmail.com>
Tested-by: Isaac Smith <hunternet93 at gmail.com>
Signed-off-by: Eldad Zack <eldad at fogrefinery.com>
---
 sound/usb/quirks-table.h |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

Applies against mainline 3.7.0 and sound-3.8.

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 49f9af9..e3c59f0 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -99,6 +99,42 @@
 },
 
 /*
+ * HP Wireless Audio
+ * When not ignored, causes instability issues for some users, forcing them to
+ * blacklist the entire module.
+ */
+{
+	USB_DEVICE(0x0424, 0xb832),
+	.driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+		.vendor_name = "Standard Microsystems Corp.",
+		.product_name = "HP Wireless Audio",
+		.ifnum = QUIRK_ANY_INTERFACE,
+		.type = QUIRK_COMPOSITE,
+		.data = (const struct snd_usb_audio_quirk[]) {
+			/* Mixer */
+			{
+				.ifnum = 0,
+				.type = QUIRK_IGNORE_INTERFACE,
+			},
+			/* Playback */
+			{
+				.ifnum = 1,
+				.type = QUIRK_IGNORE_INTERFACE,
+			},
+			/* Capture */
+			{
+				.ifnum = 2,
+				.type = QUIRK_IGNORE_INTERFACE,
+			},
+			/* HID Device, .ifnum = 3 */
+			{
+				.ifnum = -1,
+			}
+		}
+	}
+},
+
+/*
  * Logitech QuickCam: bDeviceClass is vendor-specific, so generic interface
  * class matches do not take effect without an explicit ID match.
  */
-- 
1.7.8.6