On Sat, 22 Dec 2007, Steven M. Bellovin wrote:
>> Things like "display switch" hotkeys are not unique to Thinkpads.
>
> That one, sure, but all of them?  Other buttons?

FYI, the PSWITCH_HK_* constants are suggestions, much in the same way that 
MI audio uses AudioC*/AudioN* for mixer control names. The hotkey device 
driver is free to create custom events as it sees fit.

The reason for PSWITCH_HK_* should be obvious -- to prevent cases where 
a sony(4) driver delivers a "display_cycle" event, asus(4) delivers 
"displayswitch", vald(4) delivers "DisplayToggle", and thinkpad(4) 
delivers "display-cycle".

Jared