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My USB keyboard driver doesn't work on Jaguar ?!



Hi everyone,


I have a driver for multimedia keys on my USB keyboard (interface 1),it was
build on 10.0.4 and
works well on 10.0.4 , and 10.1(all sub versions).
Let me explain how my driver works for me.
After the driver is loaded every multimedia key-stroke will be keep in a
memory buffer queue in driver.
A daemom process querys the buffer by calling driver function and do the job
(e.g. open a folder or execute an appl).

Under OS v10.2 the driver seems no problem but my daemon process always get a
fail code (0x10000003) when query
the keyboard buffer queue in driver.

I use IOConnectMethodScalarIScalarO(port, func_desc, ...) in daemon process
to exchange data between driver and daemon.
On older OS versions (before Jaguar) it works fine and returns noErr.
But under Jaguar the IOConnectMethodScalarIScalarO() function always
returned error (0x10000003).
After I review the printout log from my driver, I found that driver
successfully execute the function (func_desc) that
daemon process called.
The result confuses me.
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