[Intel-gfx] how to disable dpst on linux?

[Antti Koskipää]

On 11/22/12 16:36, РоманМельник wrote:
> Antti Koskipää <antti.koskipaa <at> linux.intel.com> writes:
> 
>>
>> On 11/20/12 20:24, Роман Мельник wrote:
>>> Good day!
>>>
>>> I've sent already mail, but got no response, so trying again.
>>> Please advise how to disable dpst on linux? The module is i915. As I
>>> see, windows driver has such checkbox for this. Can I do the same on linux?
>>
>> The linux driver does not support DPST at all.
>>
> 
> But I definitely see that when the laptop works from battery, it changes
> dynamically the contrast of the screen depends on what the summary brightness of
> the screen (the more dark pixels - the more screen has less contrast). If this
> is not DPST, so that what can it be and how to disable this? Thanks!!

It could be CABC (Content Adaptive Backlight Control) which is a similar
technology but is implemented fully in hardware, in the panel. How you
can disable (and IF you can disable it) depends completely on the hardware.

-- 
- Antti