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I'm not sure if this has been brought up before, but I wouldn't be surprised if it was missed. I am the type of user who likes to use the phone at full brightness, as it does not seem to have a huge negative impact on my battery life in day to day operations.
I was looking carefully at the browser on the Galaxy and wondered why the whites looked so dimmed in comparison to other parts of the operating system.
I had already done the following:
1. Turned the OS brightness all the way up.
2. Turned browser brightness all the way up.
3. Disabled the screen power saving mode.
I then downloaded a flashlight application and maxed it to 100% while switching to the browser with the Home key multitask, and going back and forward between the flashlight app and the browser app, it is very clear that the browser is not pushing max brightness. Even though the brightness settings on both the OS and the browser are maxed, it seems as though the browser is capped to 80% brightness or so.
My friend also verified this during his test run, as he has just bought the Samsung Vibrant and noticed the same thing. I understand many will just leave the auto-brightness setting on, but that's not really addressing the issue here.
Is there a way for an XDA developer to correct this issue through a patch or ROM?
thanks
I checked with the shell and when brightness is at 100% it has an absolute value of 255, the same when I'm at the browser set with full brightness, so it seems it's working as it should.
You can check it with this command
Code:
cat /sys/devices/platform/s3cfb/spi_gpio.3/spi3.0/blacklight/s5p_bl/actual_brightness
darksnarfer said:
I checked with the shell and when brightness is at 100% it has an absolute value of 255, the same when I'm at the browser set with full brightness, so it seems it's working as it should.
You can check it with this command
Code:
cat /sys/devices/platform/s3cfb/spi_gpio.3/spi3.0/blacklight/s5p_bl/actual_brightness
Click to expand...
Click to collapse
I don't know, I experience the same thing as the OP. Everything's bright, except when surfing the web.
Same issue here. I use Opera in bright daylight.
Sent from my GT-I9000 using XDA App
If you go in to the brightness settings there is an option at the very bottom called "Power saving mode". I'm not sure if that is having any effect on the browser.
Thanks for the numbers, but I gotta say, just comparing the flashlight app and hitting the back arrow to toggle to the browser, it is beyond obvious that the browser is not as bright as the flashlight application. I used google with it's white background and zoomed in to an area that was just white to avoid other distractions.
This is the best way to test since there will be no transition in between the application toggle and you see the screen dim easily.
As indicated by my original post, I have also turned off the power saving feature so that is not a concern. Someone did say that the Behold 2 has the same cap for their browser and that this is a samsung specific setting that's probably there to save battery. I haven't been able to confirm it on that phone yet but just give the flashlight test a chance and you'll see.
oh one last thing i noticed is, when going from the browser back to the flashlight, sometimes the flashlight app is also dimmed at the same level brightness as the browser, but tapping the screen 'wakes' up the app into full brightness.
TGalaxy browser brightness
To me it's very obvious that the browser is dimmed down, I'd say more than to 80%... Having google as the default homepage couldn't make it more obvious when opening the browser! Samsung obviously thought that no one with a decent eyesight will buy their phone. Or anyone who feels capable of managing their phone's battery life themselves.
It's just one of those niggling things that had to be included, lessening the experience of an otherwise rather breathtaking phone. Another one is the compulsory vibration when charging is finished - makes me wonder when others, or the developers for that matter, charge their smartphones! I charge them overnight, and of course every night... or at least used to, as with the Galaxy S, I can no longer sleep.
I think I've been through every menu possible to change these couple of features, with no success... if anyone knows anything, please share.
It happens on the dim-side, too
I have the same problem, but on the dim side. The browser brightens the screen when it comes on if you have the brightness set to zero. I like it dimmed all the way at night if I'm reading in bed when the lights are out and my partner is asleep, but it keeps turning it up so it's pretty bright in the pitch dark. Arrgh. It's my phone, can't I set it the way I want? Grr.
I've read that there are limitations on how much the screen dims and brightens unless you have a rooted phone and you use an app that's not built into the OS.
I rooted mine and there are some configuration apps that will set it to 0, but I think the built-in operating system slider doesn't go all the way to zero and might not go all the way to 255 when you slide it to the very edges. Supposedly it only goes to 10 on the low side from the notes on some apps.
So, probably it's a similar limitation on the slider for the screen brightness in the browser. We're probably stuck with this problem until someone writes an app that lets you change this setting to any value between 0 and 255 since the default sliders don't allow the low side and I'm guessing not the high side either.
So . . . any android developers out there, it would be cool if you could make an app to change this setting if it's available programatically somewhere.
I tried the "Dimmer" and "Brightness!" apps from the market. But none of them 'Keep' the brightness at the minimum always.
Hi all,
Got the Galaxy S for a month, pretty happy with it. Yesterday, the brightness suddenly gone up. The worst part is the display lost the gradient scaling and it is replaced by colour bands!
Apps like the stock video player for example. Before the video is played, you can see the grey control bar at the bottom covers by a lot of colour bands. The colour of the movie is all washed out as if you were playing it in 8 bit colour mode. Where the same avi played okay before, crystal clear and colour was rich.
Same thing with the charging screen while the phone is off. You can see the colour bands on the grey area of the shadow of the green battery. Just wondering if anyone has the same problem?
Cheers!
Factory reset :d
Tried all that full factory wipe, data reset, flash to different rom. Nothing works
Then your device's probably faulty. replace it.
Pretty certain it is. I took a screenshot of the video player and it looks fine but on the screen, you can still see those colour bands meters away.
I guess this indicates the LCD is faulty.
romhunter said:
I guess this indicates the LCD is faulty.
Click to expand...
Click to collapse
The galaxy s has no LCD its LED
Ive noticed when you slide down that tray from the top, when closing it mine has MANY TIMES switched to full brightness. But simply tapping the brightness button on the multi widget thingy makes it go back to how I want.
evil-doer said:
The galaxy s has no LCD its LED
Ive noticed when you slide down that tray from the top, when closing it mine has MANY TIMES switched to full brightness. But simply tapping the brightness button on the multi widget thingy makes it go back to how I want.
Click to expand...
Click to collapse
Thats because you can adjust the brightness by sliding your finger accross the notification bar.... doesnt work if you have auto brightness ticked...
talboy said:
Thats because you can adjust the brightness by sliding your finger accross the notification bar.... doesnt work if you have auto brightness ticked...
Click to expand...
Click to collapse
I have auto brightness ticked, sliding still works for me
Standard rom btw...
Sent from my GT-I9000 using XDA App
Hi I have the exact same problem! But I didn't notice it before now wen I saw this thread. But all the colours are just fine when I play a vid, it's just the grey controlbar that is by many stripes of different colours, looks like 8bit colour. But when the vid starts playing its just fine, because it gets transparent. Should I get this phone changed, have just had it a couple of weeks.
Sent from my GT-I9000 using XDA App
Hi Radat,
I posted more info in the other forum including some screenshots. http://forums.whirlpool.net.au/forum-replies.cfm?t=1520586
Hope yours okay. I am going to call Samsung tomorrow.
romhunter,
yup, saw the screenshots, looks like quantization problem i.e. that colours are using fewer bits than normal. For example, RGB screen might use 24 bits per pixel, 8 bits per r/g/b colour, the screenshots seem to suggest only 5 or 6 bits per colour.
Hopefully this is just a software glitch, though you said you already tried factory reset / wipe, could it be a loose cable wire somewhere or maybe a problem with the screen to mainboard connector?
talboy said:
Thats because you can adjust the brightness by sliding your finger accross the notification bar.... doesnt work if you have auto brightness ticked...
Click to expand...
Click to collapse
awesome. theres so many little shortcuts like this ive yet to learn. thanks
On my sgs, there is a green colour attached to to the grey colours, I can see it really good when using Screen test app on the gray scale screen, all grey is sort of green!
romhunter said:
Hi all,
Got the Galaxy S for a month, pretty happy with it. Yesterday, the brightness suddenly gone up. The worst part is the display lost the gradient scaling and it is replaced by colour bands!
Cheers!
Click to expand...
Click to collapse
Just got a brand new device. Used it for about an hour, then the exact same thing happened - out of the blue.
Any possible home-front solutions? Having to take it to be serviced is a PITA for me ATM.
Mine definitely seems to have banding in the video player control pane before the video playback starts. Can someone please post a screenshot of how it should be? I haven't seen the banding issue anywhere else except the battery charging indicator when charging the phone when it's turned off. And as far as I remember they were always like that.
So can someone please post a screenshot of how it should be for me to compare.
I have the same problem appeared after upgrading to Froyo. Brightness increased (even it is high in the lowest setting) and color saturation also increased. As a result, i see bandings or lines where a color gradient exist. I added an example photo from "Samsung Apps" page. You can easily see bandings on the bottom. I see such things in a PC screen if color adjustment is not optimum. So there must be a way to adjust screen saturation and brightness by a software through registry i think. It seems like a software problem. I think it is a very rare problem, i found few people on the web complaining about it. Mostly HTC Desire, which use also Samsung Amoled screen, users complaining about it.
I did everything said on forums to solve it but no way. I flashed many different roms both eclair and froyo, use a software given in HTC forums to change RGB color, changed color settings through video player etc. Nothing worked. Please help
victor79 said:
I have the same problem appeared after upgrading to Froyo. Brightness increased (even it is high in the lowest setting) and color saturation also increased. As a result, i see bandings or lines where a color gradient exist. I added an example photo from "Samsung Apps" page. You can easily see bandings on the bottom. I see such things in a PC screen if color adjustment is not optimum. So there must be a way to adjust screen saturation and brightness by a software through registry i think. It seems like a software problem. I think it is a very rare problem, i found few people on the web complaining about it. Mostly HTC Desire, which use also Samsung Amoled screen, users complaining about it.
I did everything said on forums to solve it but no way. I flashed many different roms both eclair and froyo, use a software given in HTC forums to change RGB color, changed color settings through video player etc. Nothing worked. Please help
Click to expand...
Click to collapse
I looked at ur pic. I honestly dont see any problem with it. What is this banding ur talking about?
Sent from my GT-I9000 using XDA App
Bottom of the screen, around "2010 Samsungs Electronics". This part should be a smooth color transition from blue to transparent but there are circular lines between colors. Is your screen the same.
Another example. The one on the phone looks white on the upper part where a color transition from dark to light black exist and there are visible lines. But normally it was looking like the other picture (taken from notebook screen) before this problem
ah on that screen i already see 8 shades of blue, most be around 4k colors .. bummer though, it's normally a software problem, doubt that a conector has come loose. (but possible if it's a pimped up composite plug with Y/Pr/Pb, .. eh still impossible cos it's getting decoded before that)
Why, hello there!
With the Cali sun rendering my Droid almost impossible to browse I come to XDA to seek advice on possible solutions to make the ability to see the screen even marginally better! (Bar a anti-glare shield) Heard there are some possible tweaks on brightening the screen beyond it's apparent '100%' brightness but am curious if this is just positive thinking?
I have been hunting on forums for tips and tricks but to no feasible avail and, 'go in the shade' falls short of answering my question!
So is there any new developments on this or is it not possible to brighten the screen to browse on a sunny day?
Much appreciated!
~L*xo
Are you rooted? If so go to the Market and download Adjbrightness app, it is free and lets you turn the screen display brightness to its Max or any other preset or custom brightness you like. You can also turn off the backlight on the touch keys. If you aren't rooted try auto setting in the display options or try an on screen widget such as the power bar widget that is stock loaded on the Droid1. Long press the homescreen, choose widget, powerbar. Hope this helped.
Thank you for Your reply!
I don't think I worded my question properly.. I meant brightening the screen beyond using an app that can adjust the brightness (I have mine set to 100% in the sun and 0% at night!)
I was hoping there was a further tweak to get the screen even brighter to browse when the sun is glarong down...if that is even possible?
Thank you so much!
.......Ohh and yes I'm rooted (LithiumMod)
Sent from my Droid using XDA App
Is there a way to lower the brightness beyond the default minimal setting? I've noticed that even on the lowest setting, I can still use the thing like a flashlight.
Sent from my Nexus One using XDA App
Too bright? Haven't heard that one. Mainly complaints about not bright enough in the sunlight and such.
I'm no programmer or anything, but as far as I know the android system has a brightness value of 0-100%, and the user (or apps) can change the value to anywhere in between. There might be a hack to undervolt the screen, but as far as I know one doesn't exist.
I'm guessing he has an AMOLED... in which case, I understand. The screen is bloody bright, even on the lowest setting.
My only idea would be to install one of the CM roms that lets you use the surface flinger mod to change your display to a monochrome red.
download 'screen filter' or 'total screen control' from the market. they allow you to apply a dark layer dim your phones screen to however much you want. hope this helps
Only time I really notice mine is too bright is reading if I use white on black, so I use a grey on black.. Fixed.
Although yeah, if i poke into the market first thing in the morning or such, it's pretty bright.
Problem with the screen overlays with surface flinger and such is you have to manually enable/disable them. It would be nice if the screen would go lower in some cases.
If you think your screen is not uniform, then you know the way it is not uniform. If you haven't realized such thing, please leave this thread for your sanity :cyclops:
UPDATE:
I have done some research and experiments and came up with this solution. If you suffer from uniformity problems, this might be useful. If you are a developer, please consider building around this idea!
Aim :
To make our screen look perfectly uniform without any tint/temperature problems.
What you need:
Download these from play store:
-Screen Filter
-Gradient Wallpaper
Also on your computer [optional , for fine-tuning] :
-Adobe photoshop
How to
1) Open white/gray solid images to observe your uniformity issues. Take a pen and write down, or even make a simple drawing ( eg. left edge is more yellow and right edge is more blue)
2) Launch gradient wallpaper app. Look at your notes and make a gradient which is exactly the negative of your initial tint (eg. left edge is more blue and right edge is more yellow). Save it.
3) Launch screen filter app. Select the gradient image you saved and load it as a filter. Increase the transparency and calibrate it to your liking.
4) (optional) Use Photoshop for much more flexibility with places of gradients/ shapes etc.
----------------------
Hello everyone,
Nexus 4 is an awesome phone with minor imperfections. One of them is washed out colors which is fixed by many custom kernels.
The other imperfection is light bleeding, which is a hardware issue. However this and similar issues with hardware causes non-uniformity (or unevenness) across the display specially if it is held horizontally on a white/gray backgrounds.
I have used 10-15 different handled device with ips displays and %80 of them had a visible non-uniformity. Some of us might be totally fine with it while some of us like myself might want better calibration.
HERE IS THE REQUEST:
I have tried fauxdisplay/kernel for a week and I can customize my screen pretty much however I want. The problem is this kernel/app applies the rules for all of the pixels. It would me awesome if we could have 'local' calibrations. (people who use photoshop should be familiar with adjustment brush that changes properties of chosen area).
Tell me what you think about this.
Re: [request for developers] Local screen calibration
What do you mean exactly? And why?
Sent from my Nexus 4 using xda premium
Re: [request for developers] Local screen calibration
Why would we want this? I'm not sure I understand what use this would have.
Sent from my Nexus 4 using xda premium
mark manning said:
Why would we want this? I'm not sure I understand what use this would have.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
To fix non uniformities across the screen . For IPS screens, when you tilt left you willsee aa yellow tint on the screen, when you tilt right you will see a blue one. If you are looking directly without tilting, right side will be bluer than left side (like a gradient most visible with gray) To fix this, we can tell our kernel to render left side little bit bluer to reduce the gradient effect.
Hope this is explanatory.
maxwellr said:
To fix non uniformities across the screen . For IPS screens, when you tilt left you willsee aa yellow tint on the screen, when you tilt right you will see a blue one. If you are looking directly without tilting, right side will be bluer than left side (like a gradient most visible with gray) To fix this, we can tell our kernel to render left side little bit bluer to reduce the gradient effect.
Hope this is explanatory.
Click to expand...
Click to collapse
i get what you mean, but im sure its a LOT more work than just that..
on another note, i read that the optimus g rom on the nexus makes the screen look absolutely amazing - im waiting till someone ports the settings for that onto our phone and hope that this calibration issue ends there.. too much time is being wasted on this (for good measure, yes. but still)
Re: [request for developers] Local screen calibration
maxwellr said:
Hello everyone,
Nexus 4 is an awesome phone with minor imperfections. One of them is washed out colors which is fixed by many custom kernels.
The other imperfection is light bleeding, which is a hardware issue. However this and similar issues with hardware causes non-uniformity (or unevenness) across the display specially if it is held horizontally on a white/gray backgrounds.
I have used 10-15 different handled device with ips displays and %80 of them had a visible non-uniformity. Some of us might be totally fine with it while some of us like myself might want better calibration.
HERE IS THE REQUEST:
I have tried fauxdisplay/kernel for a week and I can customize my screen pretty much however I want. The problem is this kernel/app applies the rules for all of the pixels. It would me awesome if we could have 'local' calibrations. (people who use photoshop should be familiar with adjustment brush that changes properties of chosen area).
Tell me what you think about this.
Click to expand...
Click to collapse
You are asking too much.
Yes you are. LCD screens cannot have regional calibration.
Sent from my Nexus 4 using xda premium
richteralan said:
You are asking too much.
Yes you are. LCD screens cannot have regional calibration.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
I don't know how current calibrating is done, so I'd be happy if some developer can help me out.
There are possiblities:
software filtering -> gpu-> driver-> screen (slow)
gpu-> graphic matrix-> software calibration -> driver-> screen (fast)
gpu-> graphic matrix-> driver-> calibration within driver with given values -> screen (fastest)
if it is the first one, it can easily be done. You can choose what to do to any individual pixel. For example, It is done when there are pop-up windows. While pop-up is bright and visible, remaining area is darkened/grayed with some software processing. So with root access, a program might make sure that some area of the screen is always dimmer, brighter or more saturated than other, while it is running on background. (like a filter that is always on top. This for sure can be done: look at many apps that you can slide from left anywhere within android and some menu pops up. What if instead of a menu %85 transparent and blue [to fix yellowing] solid color stays there?)
If it is second one, well, then it is hard as it needs a lot of C programming- testing. But it will be faster than first option.
Check the first post for the update!