[alsa-devel] [PATCH] ALSA: usb: Work around CM6631 sample rate change bug

Clemens Ladisch clemens at ladisch.de
Tue Mar 5 11:35:35 CET 2013

Torstein Hegge wrote:
> On Tue, Mar 05, 2013 at 08:55:03AM +0100, Clemens Ladisch wrote:
>> From that driver's .inf file:
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0301&MI_00
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0302&MI_00
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0304&MI_00
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0305&MI_00
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0306&MI_00
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0309&MI_00
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0310&MI_00
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0311&MI_00	;CM6610A
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0312&MI_00	;CM6620A
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0313&MI_00	;CM6630A
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0314&MI_00	;CM6631A
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0319&MI_00	;CM6631A
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_0D8C&PID_0315&MI_00	;CM6632A
>> %CMUACWO.DeviceDesc%=CMUACWO,USB\VID_200C&PID_1030&MI_00
> I'm not quite sure how to interpret that. I guess most of those are
> similar devices that doesn't necessarily need this workaround?

Those are all the IDs that the C-Media driver attaches to.  The
hardware is always the same; I would be surprised if the firmware
did not have the same bug.


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