ACPI support for Toshiba Satellite Pro L770-116

[Thomas Mitterfellner <thomas@mitterfellner.at>]

Hello!

I run a 2.6.37.6 kernel on a Toshiba Satellite Pro L770-116 Notebook 
with an American Megatrends BIOS (Aptio Setup Utility).

I read that Toshibas with Phoenix BIOS are treated differently from the 
ones with a Toshiba BIOS, with different kernel modules being necessary 
(the toshiba_acpi module is not appropriate for my laptop ('no such 
device'). However, I could not find any information on Toshiba Laptops 
with an AMI BIOS. The only Toshiba-specific module that's being loaded 
is toshiba_bluetooth.

Some ACPI features do work like e.g. the fan control, and toggling the 
state of the internal WLAN card with Fn-F8.

When I enter acpi -V, there's a line saying:

Cooling 0: LCD 6 of 7

I noticed that I can alter the value of 'Cooling 0: LCD 6 of 7' with 
Fn-F6/Fn-F7, but the brightness of the display does not change accordingly.

Fn-F3 and closing the lid crashes the system completely, enabling the 
VGA port output does not seem to work, Fn-ESC displays a symbol for 
muting toggled but it has no actual effect on the sound output.

I tried to manually load omnibook kernel module, as some pages suggested 
it supports Toshibas with non-Toshiba BIOSes, but it does not seem to do 
so and gives kernel error messages (omnibook: Unknown model).

I would be glad to provide additional information that might be needed 
by module developers to add support for the ACPI functions of the 
Toshiba Satellite Pro L770-116. I read that Toshiba may provide 
information for Linux developers too [1], which at least *sounds* good.

Thank you for reading, kind regards,

Thomas

   [1] http://linux.toshiba-dme.co.jp/linux/eng/develop.htm