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Re: /proc/acpi/video



On Sat, 29 Oct 2011 14:19:43 +0300, Volkan YAZICI wrote:

> I'm using a custom built vanilla Linux kernel of version 3.0.0. Despite
> I loaded every available ACPI related module, I still cannot see any
> "video" folder under /proc/acpi directory, hence I cannot alter display
> brigthness, etc. Any ideas? What might I be missing?

I'm running a Debian stock kernel (3.0.0-1) and neither have that entry 
under "/proc/acpi" but can control the brigthness of my netbook either 
from GNOME or using the hotkeys.

Maybe this Ubuntu debug guide for backlight can give you any hints:

https://wiki.ubuntu.com/Kernel/Debugging/Backlight

Specifically this statement:

***
The /proc/acpi/video interface

Warning /!\ This actually is deprecated and would also only be working if 
the ACPI backlight driver is active. It will be described only for 
completeness. The ACPI backlight driver also exposes itself through the 
new sysfs interface. 
***

Besides, review your kernel config, just in case:

grep -i -e backlight -e acpi /boot/config-3*

Greetings,

-- 
Camaleón


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