[BUG] capslock works across all keyboards but LED does not

[Ming Lei <ming.lei@xxxxxxxxxxxxx>]

Hi,

There is one report on the below problem:[1]

        - connect one usb keyboard into laptop
        - press capslock on internal ps/2 keyboard
        - input from both two keyboards  becomes upper case state
        - but only capslock led is on in ps/2 keyboard and not on in
usb keyboard

or
        - connect one usb keyboard into laptop
        - press capslock on usb keyboard
        - input from both two keyboards  becomes upper case state
        - but only capslock led is on in usb keyboard and not on in
internal ps/2 keyboard

No such problem on windows, and capslock input is always consistent with the led
state on both keyboards.

I can reproduce the above problem 100% on my T410 laptop.

[1], https://bugs.launchpad.net/ubuntu/+source/linux/+bug/830063

Thanks,
--
Ming Lei
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