LCD brightness capability question

[Jan Jockusch]

Hello Richard,

> Depends what they emit from the kernel. My toshiba had to have a special
>
>hal addon written for the special toshiba smbios interface, but most
>stuff works out of the box.
>  
>
I'm afraid a similar add-on is also necessary for fujitsu tablets. There 
are several people who have dealt with the issue. The most interesting 
description of a similar hardware setup comes from

http://apanel.sourceforge.net/tech.php

There, the apanel developer describes how to identify the SMBus address 
of the button devices. I still have no idea if I have the same hardware, 
but I'd still like to skim my BIOS for the strings pointed out in that 
article.

But: how do I read my BIOS? Any idea on where to find it, e.g. its 
offset in /dev/mem? If you know anything about spying out a BIOS, that 
would help me a lot.

>Exactly what buttons need supporting? Do you get events for them using
>"lshal -m" ?
>  
>
The Stylistic tablets have ten buttons plus a detector for "docked" and 
a detector for "vertical/horizontal orientation" (because the dock can 
swivel the tablet to an upright position). Presumably, the SMBus device 
also has interrupt capability. The buttons are: up, down, page-up, 
page-down, Fn, Enter, Esc, Orient, Mail, Alt). I suppose these can be 
mapped arbitrarily.

lshal -m doesn't reveal anything. (xev doesn't, either, of course).

A kernel module exists for a similar Tablet, but that module doesn't 
work for me. I contacted the author for hints, but got no answer yet. 
Maybe you're interested to look at

http://jan.rychter.com/software/fjbtndrv/fjbtndrv.ucw

I'd like to have a look at the toshiba smbios code, too. Can you give me 
a pointer? With that and the BIOS information, maybe I can work out a 
precise specification.

- Ján.