[ltp] HAL and ThinkVantage

[Jens Rutschmann]

Marius Gedminas wrote on 22.12.2008 14:19:
>>         <append key="input.keymap.data" type="strlist">0x17:prog1</append>
>>         <append key="info.capabilities" type="strlist">input.keymap</append>
> 
> This is awesome.  Could you point me towards some documentation about
> this?  Where does the 0x17 come from (hardware scancode)?  Where is the
> set of names that include 'prog1' defined?  Is it evdev that does the
> remapping defined by HAL?


Hi,
I tried it with a different key name. Here's mine:
         <append key="input.keymap.data" type="strlist">0x17:computer</append>


Check /usr/src/linux/include/linux/input.h
At line 281:
#define KEY_COMPUTER		157

At line 271:
#define KEY_PROG1		148

Line numbers taken from 2.6.27.6 vanilla sources + tpsmapi and thinkpad_acpi 
patches.


Here is what I guess. It's probably not completly correct, but at least it works 
on my system:
If you use "0x17:computer" then the hardware scancode 0x17 (defined in 
thinkpad_acpi sources for ThinkVantage) will be mapped to the "kernel keycode" 
"KEY_COMPUTER" (decimal 157). Apparently the mapping is neither case sensitive 
nor does one need to specify the "KEY_" prefix.


evdev later transforms it to XF86MyComputer which can be used for usual key 
bindings then.
I do not know where the mapping between "kernel keycode" and X keysyms is 
defined, but /usr/share/X11/XKeysymDB is also worth a look I guess.


Best regards,
Jens