On 05/13/2011 10:46 PM, Mike Blumenkrantz wrote:
> On Fri, 13 May 2011 22:23:57 +0200 (CEST)
> Vincent Torri<vto...@univ-evry.fr>  wrote:
>
>>
>>
>> On Fri, 13 May 2011, Mike Blumenkrantz wrote:
>>
>>> On Fri, 13 May 2011 17:41:29 +0200
>>> Mathieu Taillefumier<mathieu.taillefum...@free.fr>  wrote:
>>>
>>>> Hi,
>>>>
>>>>> actually i see the backlight controls in:
>>>>>
>>>>> /proc/acpi/video/NGFX/LCD/brightness
>>>>> /proc/acpi/video/NGFX/CRT/brightness
>>>>> /proc/acpi/video/NGFX/HDMI/brightness
>>>>> /sys/devices/virtual/backlight/acpi_video0/brightness
>>>>> /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/leds/ath9k-phy0::radio/brightness
>>>>> /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/leds/ath9k-phy0::assoc/brightness
>>>>> /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/leds/ath9k-phy0::tx/brightness
>>>>> /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/leds/ath9k-phy0::rx/brightness
>>>>> /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/leds/mmc0::/brightness
>>>>> /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.4/leds/mmc1::/brightness
>>>>>
>>>>> for example. some of these are led's for network and sd card slots, not
>>>>> the screen.brightness controls also floating about in /proc
>>>>>
>>>>> on another laptop with a radeon it's:
>>>>> /proc/acpi/video/VGA/DFP1/brightness
>>>>> /proc/acpi/video/VGA/TV/brightness
>>>>> /proc/acpi/video/VGA/CRT/brightness
>>>>> /proc/acpi/video/VGA/LCD/brightness
>>>>>
>>>>> as well as more in /sys... pick the one thats used :) (probably LCD). i've
>>>>> found others in other weird places. but whenever xrandr doesn't work - the
>>>>> fallback is to go to /proc or /sys - also dont assume users will have the
>>>>> latest and greatest of drivers and kernels so even if a newer driver does
>>>>> work, an older may not, so need to go to /proc or /sys
>>>>
>>>> Thanks ;). It is just that setting up backlight level on laptop with
>>>> nvidia card does not necessary works with acpi methods. Lot of people
>>>> have trouble with it (even me with my sony laptop on nvidia card) that
>>>> is why is not as simple as it seems. Anyway, I agree that I should not
>>>> assume that everyone will have the latest kernels+xorg+nvidia (amd)
>>>> stack on their computer. For now, I want to finish the xrandr part and
>>>> the dialog box and then I will tackle the acpi method.
>>>>
>>>>>>>> - a nice little box indicating the backlight level when it is changed
>>>>>>>> (edje kind of thing, related to themes).
>>>>>>>
>>>>>>> steal all the code from mixer gadget - for its gadget and popup. thats
>>>>>>> what u need there. :)
>>>>>>>
>>>>>>>> - find a way to update backlight when modified by an other program
>>>>>>>> (xbacklight for instance).
>>>>>>>
>>>>>>> for now i'd say use a poller like battery and temperature and make it
>>>>>>> poll by default every 32ticks (4seconds). allow setting poll interval.
>>>>>>> should also GET the backlight value first every time you try and modify
>>>>>>> it.
>>>>>>
>>>>>> It was more or lest my intention, i.e. I will use a timer and check that
>>>>>> backlight property did not change outside e17. it is simple to do that.
>>>>>> I will code that today if I have time.
>>>>>
>>>>> use a poller, not timer. :) see other modules like above :)
>>>>>
>>>> Ok. I will check the battery modules to see how to use them.
>>>>
>>>> Mathieu
>>>>
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>>> if it's in /sys/ use eeze.
>>
>> eeze is linux only. There are other Unix OS out there that are running e17
>> and its modules
>>
>> Vincent
> true, but for linux support it should be using eeze to ensure that it gets the
> correct path and supports all possible controls.
>
I agree with you on that. Using eeze will simplify my life a bit on 
linux. As for the others Unix os, I will have to find someone with 
bsd/solaris/aix in my surrounding to check how I can have access to the 
acpi backlight control.

Mathieu

------------------------------------------------------------------------------
Achieve unprecedented app performance and reliability
What every C/C++ and Fortran developer should know.
Learn how Intel has extended the reach of its next-generation tools
to help boost performance applications - inlcuding clusters.
http://p.sf.net/sfu/intel-dev2devmay
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