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How to disable auto-brightness

Forum Graphic & Displays : Graphics Cards - How to disable auto-brightness

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yonef   06-30-2009 at 05:10:29 PM

Is there any efficient way to get rid of the "auto-brightness" feature?
I'm not sure if this is a Graphic Card feature or monitor feature, or windows feature, but my Monitor is LG M228WA, and video: HD 4870, and this happens to Windows Vista and Windows 7 as well;

The problem is that, when dark scenes displayed, my picture goes even darker, when bright scenes displayed, my picture goes brighter.
So how can I get rid of it?

------------------------------ AMD Phenom II 940 OC @ 3.6 Ghz, 1.43V(cooled by Zalman CNPS9700-NT)
Gigabyte MA790X-UD4 (SB750); Corsair 2x2GB 1066Mhz 5-5-5-15 HDD Samsung SpinPoint F1 1TB; HDD Seagate Baracuda 7200.10 250GB;
LG DVD-RW; ATI Radeon HD 4870 @ 850/4200 Mhz; 22"LCD;
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uncfan_2563   07-01-2009 at 06:06:26 AM
- 0 +

well, i've never heard of anything like this on a graphics card so it's probably your monitor. You can try:

1. Sifting through the monitor menus for something that could be triggering this
2. Try another monitor/tv and see if it continues

Reply to uncfan_2563
Twoboxer   07-01-2009 at 06:50:32 AM
- 0 +

As uncfan mentioned, there may be some settings - like those mentioned on page 34 of your manual - that may have some affect on what you are seeing.

Other than that, I can't think of anything PC-side that would do that.

Reply to Twoboxer
boudy   07-01-2009 at 07:03:18 AM
- 0 +

Looked at the features for your monitor on LG's website and found this:

Quote :

FLATRON f Engine
The LG Flatron f-Engine™ uses DAFI technology and Real Colour Management (RCM) to
display colours that are vivid and natural, while Adaptive Colour Technology and Contrast
Enhancement boost brightness and contrast. This picture-enhancing chip optimises the
image quality of videos and high-resolution digital photos.


Sound like this is your monitor.
I'm sure that your monitor has quite a few option that adjust the image quality and/or brightness automatically. Try messing around with those.

 

EDIT: After looking at the manual, try the settings on page 28.


Message edited by boudy on 07-01-2009 at 07:08:54 AM
Reply to boudy
yonef   07-01-2009 at 12:08:54 PM
- 0 +

Ok, I tried another monitor and it is not doing this; so definitelly monitor switches the brightness.

@ Twoboxer: I've tried all combinations of settinngs that are mentioned on pg.34 of the manual, one of these options changes the color temp. and the another changes preset contrast/brightness settings, but no matter what preset I choose it still goes darker in dark scenes. Strangely it is not doing that when in TV mode (the monitor has inbuild tuner). It apears to be DVI/VGA input only "feature", and yes I have tried with DVI and VGA cable to connect it to the PC.

@ boudy
http://img44.imageshack.us/img44/6673/capturesci.th.jpg
do you mean this settings? Because it is not applicable to DVI.

Message quoted 1 times
------------------------------ AMD Phenom II 940 OC @ 3.6 Ghz, 1.43V(cooled by Zalman CNPS9700-NT)
Gigabyte MA790X-UD4 (SB750); Corsair 2x2GB 1066Mhz 5-5-5-15 HDD Samsung SpinPoint F1 1TB; HDD Seagate Baracuda 7200.10 250GB;
LG DVD-RW; ATI Radeon HD 4870 @ 850/4200 Mhz; 22"LCD;
 Reply to yonef
uncfan_2563   07-01-2009 at 04:44:00 PM
- 0 +

that auto-config option i think has to do with the signal fitting on the screen. It probably isn't what you're looking for

Reply to uncfan_2563
boudy   07-01-2009 at 06:07:29 PM
- 0 +

yonef wrote :

Ok, I tried another monitor and it is not doing this; so definitelly monitor switches the brightness.
@ boudy
http://img44.imageshack.us/img44/6 [...] sci.th.jpg
do you mean this settings? Because it is not applicable to DVI.



No, that isn't what I meant...
I found the manual for your monitor online ( http://www.maadiran.com/Persian/Pr [...] Manual.pdf ), and on page 28 of that, it has a few features that you can change.

Here this is what i'm talking about:
http://i593.photobucket.com/albums/tt11/boudyreau/th_Untitled-3.jpg

Reply to boudy
yonef   07-01-2009 at 06:46:12 PM
- 0 +

OK, I found a secret menu for this monitor while googleing around. It's activated by holding both menu buttons (one on the monitor, one on the remote control) The problem is that there is no manual for this, and most of the options that I can set is just labeled "option1, option2..." :D no chance to figure out what I'm doing, but I do not want to screw somthing out.
Will be nice if there is someking of manual for that menu :(

------------------------------ AMD Phenom II 940 OC @ 3.6 Ghz, 1.43V(cooled by Zalman CNPS9700-NT)
Gigabyte MA790X-UD4 (SB750); Corsair 2x2GB 1066Mhz 5-5-5-15 HDD Samsung SpinPoint F1 1TB; HDD Seagate Baracuda 7200.10 250GB;
LG DVD-RW; ATI Radeon HD 4870 @ 850/4200 Mhz; 22"LCD;
 Reply to yonef
yonef   07-01-2009 at 06:53:55 PM
- 0 +

@boudy

That's the options taht Twoboxer talk about, but I have already did all kind of combinations and this does not disable auto-brightness :(
PSM (first on the pic.) is just different presets that is predefine by the vendor.
CSM (second) is setting for color temps.
XD (third) is setting available only for TV mode (it clears noise and stuff like this)

------------------------------ AMD Phenom II 940 OC @ 3.6 Ghz, 1.43V(cooled by Zalman CNPS9700-NT)
Gigabyte MA790X-UD4 (SB750); Corsair 2x2GB 1066Mhz 5-5-5-15 HDD Samsung SpinPoint F1 1TB; HDD Seagate Baracuda 7200.10 250GB;
LG DVD-RW; ATI Radeon HD 4870 @ 850/4200 Mhz; 22"LCD;
 Reply to yonef
boudy   07-01-2009 at 07:53:44 PM
- 0 +

How about contacting LG customer support? :D

Reply to boudy
Twoboxer   07-01-2009 at 08:30:09 PM
- 0 +

Have you tried using the "Game" setting for picture type?

I really don't want to go looking for that manual again lol, but maybe that setting disables brightness pushing for video signals.

Reply to Twoboxer
yonef   07-01-2009 at 08:37:40 PM
- 0 +

@ boudy, I have contacted LG customer support 2 days ago... still nothing. I hope they will replay soon. will see.

@ Twoboxer, I have running "game" setting most of the time. None of these settings has to do with auto-brightness :(

OK guys, thanks for the the response, lets see what LG Customer support will come for.
I'll post the results in case someone else wants to disable this "feature" :D

------------------------------ AMD Phenom II 940 OC @ 3.6 Ghz, 1.43V(cooled by Zalman CNPS9700-NT)
Gigabyte MA790X-UD4 (SB750); Corsair 2x2GB 1066Mhz 5-5-5-15 HDD Samsung SpinPoint F1 1TB; HDD Seagate Baracuda 7200.10 250GB;
LG DVD-RW; ATI Radeon HD 4870 @ 850/4200 Mhz; 22"LCD;
 Reply to yonef
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