[ltp] Back light doesn't turn off

[James Knott]

Charles E Taylor IV wrote:
> On Tue, 24 May 2005 14:00:32 -0400
> James Knott <james.knott@rogers.com> wrote:
> 
>>I have a ThinkPad R31, running SuSE 9.3.  One thing I've noticed, it
>>that when the screen blanks, after a period of inactivity, the back
>>light stays on, unlike in Window, where it turns off.  Is there any way
>>to get the back light to turn off, when it's not needed?
> 
> I'm not familiar personally with the R31, but on several other models of
> Thinkpad this is a BIOS setting if you're using APM.
> 
> If you're using ACPI, you can probably access this through ibm-acpi
> 
> Something like /proc/acpi/ibm/brightness or maybe /proc/acpi/ibm/video ?
> 
> (Disclaimer:  I've never used ACPI on a Thinkpad because it always seemed
> to lock mine up ... but ACPI works great on my JVC mini...)
> 

I haven't installed ibm-acpi.  According to the info I've read, the only
thing it supports, on th eR31, is "hotkey".  Everything else is
unsupported or untested.

Also, there is no /proc/acpi/ibm directory.