Comment 36 for bug 1247668

would regress commit

commit c7634498d4cd42c8571805122224dc2d0e44a585
Author: Daniel Stone <email address hidden>
Date: Tue May 3 02:59:53 2011 +0100

    XKB: Remove duplicate keymap-copying loop

    Previously we had:
        foreach (device + slaves of device) {
            XkbCopyDeviceKeymap(i, device);
            [...]
        }
        if (device was last slave of its MD) {
            XkbCopyDeviceKeymap(master, device);
        }
    and now:
        foreach (device + slaves of device + MD if device was last slave) {
            XkbCopyDeviceKeymap(i, device);
            [...]
        }

    As an extra bonus, when changing the keymap on a slave device, we now
    ensure the LED info on the master is kept in sync.

    Signed-off-by: Daniel Stone <email address hidden>
    Reviewed-by: Peter Hutterer <email address hidden>

so, say you have another keyboard attached (laptop docked, etc), numlock status is synced with both