Database Develop

how to edit gamma settings?

Hi,
I am using ParanoidAndroid ICS rom, Everything is superb apart from the black clipping screen. Of course I only notice the black clipping in a dark room, whereas in daylight the screen seems perfect.
In the PA rom under settings > Advanced > Screen > there is screen gamma but i can not edit it or even choose it. I'm assuming its been disabled, is there a way to enable this so I can edit the gamma settings or is there an alternative way to edit gamma settings. if there is, can anyone please share it.
Thanks in advance.

salespalace said:
Hi,
I am using ParanoidAndroid ICS rom, Everything is superb apart from the black clipping screen. Of course I only notice the black clipping in a dark room, whereas in daylight the screen seems perfect.
In the PA rom under settings > Advanced > Screen > there is screen gamma but i can not edit it or even choose it. I'm assuming its been disabled, is there a way to enable this so I can edit the gamma settings or is there an alternative way to edit gamma settings. if there is, can anyone please share it.
Thanks in advance.
Click to expand...
Click to collapse
Its not working on PA but there is an option of Outdoor Mode which makes it little bit higher.

Strange display contrast delay

Sorry for my english..
when I switch from an app with black screen (notification bar xda app etc etc) to a bright one.. Like whatsapp I see a strange thing... There is less contrast for 0.5sec then contrast is perfect and all is normal...
I don't know if you understand what I mean...
Is this normal? Or is a fault display?
Happens with stock and cyano... Full brightness and at lowest brightness...
thx for the replay

drigerott said:
Sorry for my english..
when I switch from an app with black screen (notification bar xda app etc etc) to a bright one.. Like whatsapp I see a strange thing... There is less contrast for 0.5sec then contrast is perfect and all is normal...
I don't know if you understand what I mean...
Is this normal? Or is a fault display?
Happens with stock and cyano... Full brightness and at lowest brightness...
thx for the replay
Click to expand...
Click to collapse
Thermal throttling is normally given as the answer to this.

Thanks for the fast replay... Then I must change my device? Or it'snormal

drigerott said:
Thanks for the fast replay... Then I must change my device? Or it'snormal
Click to expand...
Click to collapse
Its normal, but there are ways to change the way it does it, I am not an expert but if you root you can start to cange values. Search for thermal throttling values and you will hit a good thread about.

Yes I have root.. But I didn't understand.. For thermal throttle you mean cpu? Or even the display?
cause I don't have problem with multitask or other.. Only this strange problem that image quality is not perfect when switching to dark image to bright one.. But for less then a second.. But is frustrating and strange

drigerott said:
Yes I have root.. But I didn't understand.. For thermal throttle you mean cpu? Or even the display?
cause I don't have problem with multitask or other.. Only this strange problem that image quality is not perfect when switching to dark image to bright one.. But for less then a second.. But is frustrating and strange
Click to expand...
Click to collapse
as i said i am not an expert, but if you search in this forum you will find other threads that will give you information on which files to modify and how to do it...

gregbradley said:
as i said i am not an expert, but if you search in this forum you will find other threads that will give you information on which files to modify and how to do it...
Click to expand...
Click to collapse
ok i found some 3d about termal throttle and is not my problem.. i tried different mod but nothig...
i uploaded a video to show my problem ...
see the contrast change?
is not brightness...it's contrast that changes...

Yes, a have this effect too. I`ve changed brightness values at system/etc/sysmon.cfg, to a maximum values, after that screen doesn`t changing brightness when device is more hot, but this effect like in this video, is still exists! This contrast shading are not a termal throttling, this is something else, i don`t know exactly what it is.

i'm not alone then...
with cyanogenmod is so more evident...
tomorrow i'll turn on another one in my shop and see if is all xperia t like this...
anyway if some other has this strange problem, plz post here ^^ (maybe is a software fault)

Maybe a refresh issue?
when i scroll a page on black background with white txt.. the txt becomes greysh... if you scroll slowly remains white... happens to you too?

drigerott said:
Maybe a refresh issue?
when i scroll a page on black background with white txt.. the txt becomes greysh... if you scroll slowly remains white... happens to you too?
Click to expand...
Click to collapse
I don`t think it`s a refresh rate, but maybe i`n wrong.
And, yes, i have the same issues, and the screen is shading and becomes bright again all the time. Especially this happening when i try to open something or to enter at one of the bookmarks of phone menu, and when the phone "thinking", screen is shading, but then it becomes brighter again. I`m reaaly don`t know what it ies, but it`s not because of a thermal, 100%! I already changed the values of a brightness. I`m sure that all Xperia T phones are with the same issues, it`s bacause of a something in soft.

It has nothing to do with gpu.
Here is data sheet for AS3676 - www1.futureelectronics.com/doc/AUSTRIAMICROSYSTEMS/AS3676.pdf
And here is what DLS is from the data sheet -
8.4.9 DLS - Dynamic Luminance Scaling Input
The pin GPIO1/DLS can be used for dynamic backlight scaling input. Dynamic backlight scaling is used to reduce the power of the backlight especially when showing dark picture contents on the display. The control unit to operate DLS is the display processor sending a PWM signal to the AS3676 and in parallel changing the display content to compen- sate for a reduced brightness backlight.
DLS can be turned off in /system/etc/pre_hw_config.sh -
echo 0 > /sys/class/leds/led_1-lcd/use_dls
echo 0 > /sys/class/leds/led_2-lcd/use_dls

Is it save to turn DLS off ?
Sent from my LT30p using xda app-developers app

peetr_ said:
It has nothing to do with gpu.
Here is data sheet for AS3676 - www1.futureelectronics.com/doc/AUSTRIAMICROSYSTEMS/AS3676.pdf
And here is what DLS is from the data sheet -
8.4.9 DLS - Dynamic Luminance Scaling Input
The pin GPIO1/DLS can be used for dynamic backlight scaling input. Dynamic backlight scaling is used to reduce the power of the backlight especially when showing dark picture contents on the display. The control unit to operate DLS is the display processor sending a PWM signal to the AS3676 and in parallel changing the display content to compen- sate for a reduced brightness backlight.
DLS can be turned off in /system/etc/pre_hw_config.sh -
echo 0 > /sys/class/leds/led_1-lcd/use_dls
echo 0 > /sys/class/leds/led_2-lcd/use_dls
Click to expand...
Click to collapse
great find.. any way yesterday i turned on 5 new xperia t in my shop and all do like mine... that is DSL like peetr say..
but the annoying thing is that on cm10 (that all the ui is gray/dark) DSL is too much visible...) now i'll try to disable it.. i'll report if works
EDIT: still the same..

I don't get how to turn DLS off, what value should i change to turn it off ?
Sent from my LT30p using xda app-developers app

you must edit the file in /system/etc/pre_hw_config.sh
with root explorer or similar and change thise line: (0 instead of 1)
echo 0 > /sys/class/leds/led_1-lcd/use_dls
echo 0 > /sys/class/leds/led_2-lcd/use_dls

0 instead of 1 , and what should i set instead of 2 ? 0 too ?
And, is this save ???
Sent from my LT30p using xda app-developers app

Finally, this will have effect or no?
Because maybe we all have this issue.
Sent from my LT30p using xda premium

all xperia t works like i posted in the video (infact i tried 5 new xperia t all the same)
but that mod is not working.. for me is still the same..

DennisDD78 said:
0 instead of 1 , and what should i set instead of 2 ? 0 too ?
And, is this save ???
Sent from my LT30p using xda app-developers app
Click to expand...
Click to collapse
this is stock
echo 1 > /sys/class/leds/led_1-lcd/use_dls
echo 1 > /sys/class/leds/led_2-lcd/use_dls
change in to this:
echo 0 > /sys/class/leds/led_1-lcd/use_dls
echo 0 > /sys/class/leds/led_2-lcd/use_dls
but i see no difference..

[SOLVED] Xperia T - screen dimming

Hi, I love my Xperia T but there is one thing that bothers me. I noticed that every xperia T has that automatic screen dimming when viewing darker media on your screen. For example, when i turn on facebook app, before the actual app opens there is dark grey screen. During that sequence screen gets darker, and when white facebook page pops up you can actually see screen adjusting its brightness to higher "normal" level. That really bothers me especially when gaming. On dark sequences screen gets really dark, and than it takes second or two to adjust normal brightness when brighter sequences appear. You can actually see brightness going down when darker images are displayed, and then back up again when brighter images appear.
So I'm not talking about dimming when overheating or flickering (that second is fixed by jellybean update as I noticed), or etc. And before you ask me I if turned on autobrightness in display settings, it has nothing to do with that.
My question is, is there a way to turn this off because it is really annoying?

naga.nino said:
Hi, I love my Xperia T but there is one thing that bothers me. I noticed that every xperia T has that automatic screen dimming when viewing darker media on your screen. For example, when i turn on facebook app, before the actual app opens there is dark grey screen. During that sequence screen gets darker, and when white facebook page pops up you can actually see screen adjusting its brightness to higher "normal" level. That really bothers me especially when gaming. On dark sequences screen gets really dark, and than it takes second or two to adjust normal brightness when brighter sequences appear. You can actually see brightness going down when darker images are displayed, and then back up again when brighter images appear.
So I'm not talking about dimming when overheating or flickering (that second is fixed by jellybean update as I noticed), or etc. And before you ask me I if turned on autobrightness in display settings, it has nothing to do with that.
My question is, is there a way to turn this off because it is really annoying?
Click to expand...
Click to collapse
Have you unchecked adopt to lightning conditions already?

thrize45220 said:
Have you unchecked adopt to lightning conditions already?
Click to expand...
Click to collapse
Can you read my last sentence before question, please? It has apsolutely nothing to do with that. "Adopt to light conditions" means adopt to light conditions in your sourrounding, not in your screen light conditions.

naga.nino said:
Can you read my last sentence before question, please? It has apsolutely nothing to do with that. "Adopt to light conditions" means adopt to light conditions in your sourrounding, not in your screen light conditions.
Click to expand...
Click to collapse
All i thought it differs to auto brightness thats why i ask it sir. Sorry for the question then

You dont have to apologise. So, the problem is that when you watch darker images, or videos, or just any darker screen on your display, contrast and brightness goes down. And when you switch to brighter screen you can actually see, with your naked eye, brightnes going up. I see that Sony intentionally put that feature, but it is very, very stupid one. There is no point in making dark images even darker with even less contrast. I assume they wanted to achieve better black levels that way, or I don't know, but it is very stupid way of doing black levels more black. And, of course, there is no setting in settings menu tu turn this nonsense off, nice one Sony!

Re: [Q] Xperia T - screen dimming
naga.nino said:
You dont have to apologise. So, the problem is that when you watch darker images, or videos, or just any darker screen on your display, contrast and brightness goes down. And when you switch to brighter screen you can actually see, with your naked eye, brightnes going up. I see that Sony intentionally put that feature, but it is very, very stupid one. There is no point in making dark images even darker with even less contrast. I assume they wanted to achieve better black levels that way, or I don't know, but it is very stupid way of doing black levels more black. And, of course, there is no setting in settings menu tu turn this nonsense off, nice one Sony!
Click to expand...
Click to collapse
This similar annoying ass feature is there in my Spectre laptop. This was supposed to be a battery saving feature and I haven't yet found a way to turn it off. Maybe it's also a way to get higher black levels.

This is the Bravia Engine. Just unselect Settings -> Display -> Mobile Bravia Engine

thedisturbedone said:
This similar annoying ass feature is there in my Spectre laptop. This was supposed to be a battery saving feature and I haven't yet found a way to turn it off. Maybe it's also a way to get higher black levels.
Click to expand...
Click to collapse
Dude, this is definitely not a battery saving mode. There is no need for batery saving mode when displaying dark screen, and the problem occurs when displaying dark images or any other dark media, app or non-app. every single time.

Mad Marty said:
This is the Bravia Engine. Just unselect Settings -> Display -> Mobile Bravia Engine
Click to expand...
Click to collapse
OMG... Mobile bravia engine has apsolutely nothing to do with with that, because bravia engine works only in phones stock apps for viewing videos and pictures, and the effect is not even similiar to screen dimming. It brings more saturated colors and that is all.

Same problem is posted here: http://communities.sonyericsson.com/thread/61560?start=0&tstart=0 and Sony replied "I'm sorry that it has taken so long but I have done some testing now using a later software and I'm not able to replicate the issue that you guys report so I assume it's fixed." It is more than obvious that they like to close their eyes on every single problem that occurs. Thank you Sony for your gorgeous support to your beloved customers. I cant be more sarcastic, of course.

naga.nino said:
OMG... Mobile bravia engine has apsolutely nothing to do with with that, because bravia engine works only in phones stock apps for viewing videos and pictures, and the effect is not even similiar to screen dimming. It brings more saturated colors and that is all.
Click to expand...
Click to collapse
Well, have it your way. But with this kind of attitude, don't be surprised if no-one wants to help you.

Mad Marty said:
Well, have it your way. But with this kind of attitude, don't be surprised if no-one wants to help you.
Click to expand...
Click to collapse
It's not my way, it's the way it is. If one understands what mobile bravia engine is, one could never offered it as a solution to a problem that has nothing to do with it. I'm terribly sorry if I ofended you, and I apologize for my attitude. I'm not mad at you, or anybody else here, I just don't see why would one write something just to be written. I know my T-Rex wery well, and I know there is no "normal" way to turn this dimming crap off, so I posted my question here, and expected that someone of the experts would offer some kind of solution to that. And I got things like "turn automatic brightness off", or "turn mobile bravia engine off" even though I previously mentioned that i tried all that stuff. People are "trying" to "help" me here, and they didn't even read what I've written. I'm really not one of guys that would post a question here just to be posted, I searched the crap out of the internet, and I found apsolutely nothing helpfull. That's why I decided to open this thread, to hear what experts have to say.

Re: [Q] Xperia T - screen dimming
There is already a thread about this. I won't write it again.
Just turn of DLS.

peetr_ said:
There is already a thread about this. I won't write it again.
Just turn of DLS.
Click to expand...
Click to collapse
Thank you very much. I suppose you're talking about this: http://forum.xda-developers.com/showthread.php?t=1909710&page=16
My phone is rooted and I can't change those values. Can you explain me how to change this? I went to that system location via root explorer, but i can't do much from that point. If I try to open it in text editor it says that this is read only and can't be changed.
Thanx in advance.

naga.nino said:
Thank you very much. I suppose you're talking about this: http://forum.xda-developers.com/showthread.php?t=1909710&page=16
My phone is rooted and I can't change those values. Can you explain me how to change this? I went to that system location via root explorer, but i can't do much from that point. If I try to open it in text editor it says that this is read only and can't be changed.
Thanx in advance.
Click to expand...
Click to collapse
If you are rooted, you need root explorer and mount the directoty as RW, then open in text editor

peetr_ said:
There is already a thread about this. I won't write it again.
Just turn of DLS.
Click to expand...
Click to collapse
gregbradley said:
If you are rooted, you need root explorer and mount the directoty as RW, then open in text editor
Click to expand...
Click to collapse
Thank you guys very much! Changed values, and rebooting my phone...everything is fine now, no more stupid dimming. However...I noticed that color adjusment is still visible when changing from dark screen to colorfull bright one. So the dimming is now definitely gone, but that color adjusment is still visible, like it changes contrast a bit, from worse to better, it is clearly visible. Any ideas about that?

I'm uploading a video I recorded with my webcam to get you a closer look. I'll post a link once it's uploaded.

Video will be live here in a couple of minutes: http://youtu.be/fHozO8zGZ1Y
After I managed to turn off DLS, that auto-contrast thing still remains. If you look closely, you'll se that the blue facebook stripe (and everything else) slightly changes its color/contrast when returning from the gray screen. But DLS was much bigger pain in the ass and I'm very pleased with the result od turning it off.

Re: [Q] Xperia T - screen dimming
Why would you want to post it live?
Sent from your backyard...
Slender watches what you do...

-SlenderMan- said:
Why would you want to post it live?
Sent from your backyard...
Slender watches what you do...
Click to expand...
Click to collapse
Didn't mean literally live lol. It is uploaded, processed and watchable now.

screen too bright

hello my s5 mini, when exposed to sun for example, automatically increases the screen brightness...altought so much bright that even the colors became strange. anyway, since i am rooted, to change the maximum brightness allowed in auto mode?

mclaudio said:
hello my s5 mini, when exposed to sun for example, automatically increases the screen brightness...altought so much bright that even the colors became strange. anyway, since i am rooted, to change the maximum brightness allowed in auto mode?
Click to expand...
Click to collapse
I've just read an article pointing out this weird thing:
http://www.androidcentral.com/samsung-galaxy-s5-mini-review
I've just tested this on my S5 mini, wow! I see what they mean by colours going psychedelic.
I don't think you have any control at all under Auto Brightness. You'd have to switch Auto Brightness off then slide the brightness to Max.

ShadowFlare said:
I've just read an article pointing out this weird thing:
http://www.androidcentral.com/samsung-galaxy-s5-mini-review
I've just tested this on my S5 mini, wow! I see what they mean by colours going psychedelic.
I don't think you have any control at all under Auto Brightness. You'd have to switch Auto Brightness off then slide the brightness to Max.
Click to expand...
Click to collapse
I absolutely know what you mean, same here...

maxpower_303 said:
I absolutely know what you mean, same here...
Click to expand...
Click to collapse
maybe some moding?

Maybe this is due to a feature named "Adjust Display". Go to Settings > Screen > Screen Mode. By default, it's set to Adjust Display, so the screen will automatically change its colors depending on ambient lightning.

Black and white display on all the time? Any way to enable it?

if you watch closely on your N6, the display will go black/white right when you hit the power button to shut down the screen. It looks like ambient display and also reminds me of the galaxy's battery saver mode when the screen goes black and white to conserve battery. Anyone out there think that this can be enabled on our phones full time? I think it would be a great feature to have.

biggiestuff said:
if you watch closely on your N6, the display will go black/white right when you hit the power button to shut down the screen. It looks like ambient display and also reminds me of the galaxy's battery saver mode when the screen goes black and white to conserve battery. Anyone out there think that this can be enabled on our phones full time? I think it would be a great feature to have.
Click to expand...
Click to collapse
Probably could, but would be easier to install CF Lumen

rootSU said:
Probably could, but would be easier to install CF Lumen
Click to expand...
Click to collapse
Does that do the same thing?

Yes, It's a setting in accessibility.
biggiestuff said:
if you watch closely on your N6, the display will go black/white right when you hit the power button to shut down the screen. It looks like ambient display and also reminds me of the galaxy's battery saver mode when the screen goes black and white to conserve battery. Anyone out there think that this can be enabled on our phones full time? I think it would be a great feature to have.
Click to expand...
Click to collapse
See my title. Peace.

biggiestuff said:
Does that do the same thing?
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Click to collapse
I know it converts to greyscale first then can change it to red, blue, green screen so I imagine there is a setting for remaining in greyscale. Have a look.
vvveith said:
See my title. Peace.
Click to expand...
Click to collapse
I only have colour inversion in accessibility. You have convert to greyscale? What ROM?

rootSU said:
I only have colour inversion in accessibility. You have convert to greyscale? What ROM?
Click to expand...
Click to collapse
It is actually under developer settings > Simulate color space > Monochromacy

cupfulloflol said:
It is actually under developer settings > Simulate color space > Monochromacy
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Click to collapse
sluggish tho...

indianajonze said:
sluggish tho...
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Click to collapse
Seems to work fine so far. Haven't tried any games yet

Okay I think doing that actually burned through my battery faster haha

biggiestuff said:
Okay I think doing that actually burned through my battery faster haha
Click to expand...
Click to collapse
I can't see how it would save battery unless it was mostly pure black. The gpu needs extra work to convert to greyscale