patch for toshiba acpi

[Scott Lambert]

On Tue, Aug 19, 2003 at 08:34:25PM -0500, edscott wilson garcia wrote:
> I finally got the lcd brightness control and force-fan to work on a
> toshiba 2455 on FreeBSD 5.1. If anybody is interested, you can find the
> patch at http://linux.imp.mx/toshiba/
> 
> In to use it, apply patch and recompile acpi.ko module and copy to
> /boot/kernel. Once rebooted, sysctl will see two new variables:
> hw.acpi.toshiba.lcd_brightness
> hw.acpi.toshiba.force_fan
> 
> lcd_brightness has eight values (0-7) and force fan two values (0-1).
> 
> Finally I can dim the screen and get rid of this headache...

This is REALLY REALLY REALLY cool.  No, I mean literally, this laptop, a
Satellite 2805-S201, is now cool.

By forcing the fan on, I've lowered the temperature by more than 12K.
That makes it cool enough that my leg doesn't think its on a spit above
a barbeque pit.

Before forcing the fan on:
hw.acpi.thermal.tz0.temperature: 3282

After forcing the fan on it seems to have stablized around:
hw.acpi.thermal.tz0.temperature: 3162

./acpi_temp
System temperature = 316.2 K  43.0 C  109.4

It was 315.2K before I started Opera.

5 minutes later:
./acpi_temp 
System temperature = 311.2 K  38.0 C  100.4 F

I've also set the LCD brightness to 0.  It's not a dramatic effect but
it *is* somewhat less bright than it is at 7.

Thank you for doing this Mr. Garcia.  

Mr. Lawson, is it possible this patch could find it's way into the base
tree someday?

-- 
Scott Lambert                    KC5MLE                       Unix SysAdmin
lambert at lambertfam.org