Some USB MIDI keyboards fail to operate after a USB autosuspend. The
device is recognized by ALSA, but no events are received and the
device goes quiet.
$ amidi -l
Dir Device Name
IO hw:1,0,0 Oxygen 49 MIDI 1
$ amidi -p hw:1,0,0 -d
<... play some notes ...>
^C
0 bytes read
A workaround is to disable USB autosuspend for these devices by
putting AUTOSUSPEND_USBID_BLACKLIST="0763:2027" (resp. 0763:019b) in
/etc/laptop-mode/conf.d/usb-autosuspend.conf. In the spirit of commit
166cb70e97bd ("usb: add USB_QUIRK_RESET_RESUME for M-Audio 88es"),
reset the device on resume so this workaround is not needed any more.
Noticed on a kernel close to 3.2.10. Tested against 3.6.5. Debian's
2.6.32.54-based kernel did not seem to be affected, though it's not
clear whether that is due to code or configuration.
Addresses http://bugs.debian.org/664068
Reported-and-tested-by: David Banks <amoe...@gmail.com> # Oxygen 49
Reported-and-tested-by: Olivier MATZ <z...@droids-corp.org> # KeyRig 49
Signed-off-by: Jonathan Nieder <jrnie...@gmail.com>
Cc: sta...@vger.kernel.org
---
Thoughts?
drivers/usb/core/quirks.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index fdefd9c7f7af..998c6a8290f6 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -105,6 +105,12 @@ static const struct usb_device_id usb_quirk_list[] = {
/* Midiman M-Audio Keystation 88es */
{ USB_DEVICE(0x0763, 0x0192), .driver_info = USB_QUIRK_RESET_RESUME },
+ /* Midiman M-Audio KeyRig 49 */
+ { USB_DEVICE(0x0763, 0x019b), .driver_info = USB_QUIRK_RESET_RESUME },
+
+ /* Midiman M-Audio Oxygen 49 */
+ { USB_DEVICE(0x0763, 0x2027), .driver_info = USB_QUIRK_RESET_RESUME },
+
/* M-Systems Flash Disk Pioneers */
{ USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME },
--
1.8.0
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