Develop Bugs

[UPDATED] Auto brightness flicker - Related to CPU load? Try different governer?

Hi all.
I'm reading a lot about 'screen flicker'. But it seems people are using this to describe a few different faults.
I've noticed that my one x backlight flickers when in auto brightness mode. But it only does it under artificial light. Under natural light it's totally fine.
If I turn off Auto brightness, it is completely fine also, regardless of what level I set the brightness to.
It's almost as if the software isn't filtering the auto brightness sensor output enough and trying to respond instantaneously to even the slightest light change, giving the impression of a flicker.
Who else has this issue specifically?
It looks to me like a software issue, but I only have 3 days left in my return for refund peiod and I'm not sure what the best option is.
Cheers.
EDIT: On to my 10th handset now with the same issue and just about ready to give up, but have noticed that the flicker seems to be worse when the CPU is coming on and off heavy load.
Can someone with Root and SETCPU installed please try different governers to see if they make any difference to this issue? I don't wan to root this phone to try it myself as I may end up returning it. Thanks!

Sentinel196 said:
Hi all.
I'm reading a lot about 'screen flicker'. But it seems people are using this to describe a few different faults.
I've noticed that my one x backlight flickers when in auto brightness mode. But it only does it under artificial light. Under natural light it's totally fine.
If I turn off Auto brightness, it is completely fine also, regardless of what level I set the brightness to.
It's almost as if the software isn't filtering the auto brightness sensor output enough and trying to respond instantaneously to even the slightest light change, giving the impression of a flicker.
Who else has this issue specifically?
It looks to me like a software issue, but I only have 3 days left in my return for refund peiod and I'm not sure what the best option is.
Cheers.
Click to expand...
Click to collapse
Oh well return it, and buy a new one thats probably the best option, i ordered mine yesterday, and ill do the same in 2 weeks if it have issues

Yeah I'm thinking that might be the best option. It's just that it seems to be a Software issue to me.
Anyone upgraded to 1.28 and seen this specific problem (not the screen jumping and flickering pixels) go away?

Sentinel196 said:
Yeah I'm thinking that might be the best option. It's just that it seems to be a Software issue to me.
Anyone upgraded to 1.28 and seen this specific problem (not the screen jumping and flickering pixels) go away?
Click to expand...
Click to collapse
I've upgraded to 1.28 and still have the flickering problem. I would love to be able to believe its software and its going to get fixed with an OTA, but at the moment everyone is simply uncertain as to what the future holds.

HTC advices anyone with a flickering screen to go to your carrier and ask for a replacement
Sent from my Desire HD using xda premium

On to my 10th handset with auto-brightness flicker now. At what point should i jsut give up? lol
It seems to be somehow related to CPU load also as I'm noticing the flicker is far worse when the cpu is changing power states.
Can someone with root try a different governer for the CPU and see if that changes the flicker at all?

BUMP. I'd be really great if someone rooted could test this theory!

..
I really cant help but ill tell my experience with my onex for the past two or three weeks.
I had the flickering screen twice,
1. random on the notification bar.
2. I was taking photos and got the CPU loaded because I was shooting too many pics. the bottom side of the screen was flickering.
anyway, I notice that the flickering only happend when the auto screen rotate is enabled.

Thanks for the reply, but I think you're talking about a different flicker. I'm talking about the back-light flicker when Auto Brightness is enabled. Not the LCD panel flicker.

[Q] Light sensor damaged

Hey guys,
hope someone can help me.
I've the feeling that my light sensor might be damaged.
The setting is on automatic light regulation and i've the feeling that the
screen is very dark. Is there any possiblity to check if the light sensor still works fine?
I've already put my finger for a few seconds on it and nothing changes.
I also read in the guide that the screen should wake up when you wipe over the switched off device.
Unfortunately nothing happens when i do so.
Thanks a lot for your support

schelde_sun said:
Hey guys,
hope someone can help me.
I've the feeling that my light sensor might be damaged.
The setting is on automatic light regulation and i've the feeling that the
screen is very dark. Is there any possiblity to check if the light sensor still works fine?
I've already put my finger for a few seconds on it and nothing changes.
I also read in the guide that the screen should wake up when you wipe over the switched off device.
Unfortunately nothing happens when i do so.
Thanks a lot for your support
Click to expand...
Click to collapse
Autobrightness has been too dark since the S2. The S3 also suffers from that bug as does the Note 2. Unless Samsung fixes it with a update you`ll have to wait for a hack and root the phone to be able to change it.

gee2012 said:
Autobrightness has been to dark since the S2. The S3 also suffers from that bug as does the Note 2. Unless Samsung fixes it with a update you`ll have to wait for a hack and root the phone to be able to change it.
Click to expand...
Click to collapse
Thanks a lot for this information. I didn't know this, as it's my first Samsung mobile.
But my impression is that it worked fine, and unfortunately the note 2 fell down at weekend and
now i've the feeling that the regulation is not correct since then. Is there any test to try if the light sensor still works?
And normally the switched off screen should wake up when i swipe over the screen, right? Because it doesn't work, or is it necessary to set up some settings?
Thanks a lot again for the help!

schelde_sun said:
Thanks a lot for this information. I didn't know this, as it's my first Samsung mobile.
But my impression is that it worked fine, and unfortunately the note 2 fell down at weekend and
now i've the feeling that the regulation is not correct since then. Is there any test to try if the light sensor still works?
And normally the switched off screen should wake up when i swipe over the screen, right? Because it doesn't work, or is it necessary to set up some settings?
Thanks a lot again for the help!
Click to expand...
Click to collapse
I think there's a light sensor test in the service menu (can't remember the dialer code to access it though) and for the phone to wake when you swipe over the screen you need to enable "Quick Glance" in Settings > Motion

schelde_sun said:
Hey guys,
hope someone can help me.
I've the feeling that my light sensor might be damaged.
The setting is on automatic light regulation and i've the feeling that the
screen is very dark. Is there any possiblity to check if the light sensor still works fine?
I've already put my finger for a few seconds on it and nothing changes.
I also read in the guide that the screen should wake up when you wipe over the switched off device.
Unfortunately nothing happens when i do so.
Thanks a lot for your support
Click to expand...
Click to collapse
Hello bro,
You might want to test it with *#0*# code using dialpad.. hope this help..
Sent from my GT-N7100 using xda app-developers app

Screen flickering issue! (All Galaxy S4's)

If you lower the screen brightness all the way down and open the stock internet to Google, and tap the search bar to pop the keyboard up, you'll see a slight flicker. So far on every display s4 at the store has the same problem. Anyone have an idea if this is software or hardware related?

Huh, I dont have that problem on my phone. Just tested it.
Sent from my SGH-M919 using xda premium

I don't have that problem as well. Just tested it.

dannyyyyy said:
If you lower the screen brightness all the way down and open the stock internet to Google, and tap the search bar to pop the keyboard up, you'll see a slight flicker. So far on every display s4 at the store has the same problem. Anyone have an idea if this is software or hardware related?
Click to expand...
Click to collapse
Same here. Tested and experienced no flickering issue.

Are you talking about the smearing issue when the phone is dim all the way and you have white text on black background. Text turns hazy purple when u scroll. If so this is a known issue that's been reported here already.
http://forum.xda-developers.com/showthread.php?t=2266630
Sent from my SGH-M919 using Tapatalk 2

I've noticed flickering on super white backgrounds. It's hard to see and it's got to be the right lighting and high brightness. IMO if you need to go through a process to see a slight flicker, blobs, etc., it's not really a concern. I'm assuming it's software related.. Same with the text blur.

NICEGYPT said:
I don't have that problem as well. Just tested it.
Click to expand...
Click to collapse
Is your brightness ALL the way down to? Thats when you notice it.

dannyyyyy said:
Is your brightness ALL the way down to? Thats when you notice it.
Click to expand...
Click to collapse
I did notice some change in the brightness when the keyboard shows up. But not flickering.

NICEGYPT said:
I did notice some change in the brightness when the keyboard shows up. But not flickering.
Click to expand...
Click to collapse
Well yeah thats what I mean't by flicker lol. I honestly think the oled screen samsung put in the s4 is a little faulty and they needed to calibrate it better before shipping.

dannyyyyy said:
Well yeah thats what I mean't by flicker lol. I honestly think the oled screen samsung put in the s4 is a little faulty and they needed to calibrate it better before shipping.
Click to expand...
Click to collapse
This is the fact. From where they will gain all this billions of dollars

good
I don't have that problem as well. Just tested it. verry good

Is your brightness all the way down?
Sent from my SGH-M919 using xda app-developers app

Facing same issue !!!
dannyyyyy said:
If you lower the screen brightness all the way down and open the stock internet to Google, and tap the search bar to pop the keyboard up, you'll see a slight flicker. So far on every display s4 at the store has the same problem. Anyone have an idea if this is software or hardware related?
Click to expand...
Click to collapse
Hi,
Im facing same issue ,im from bangalore india, i observed this prob on day one, many of ppl didnt even notice this until i made them show the issue.
I even went to service centre and the service centre guy showed me 4 other phones with same problem, so he tld the manufacturing only is like this v cant help, so i had to return n adjust with the problem,
On top phone heats up for little usage of 3g

just tried this don't happen in my phone.
Sent from my SGH-M919 using xda app-developers app

mine is fine

Settings -> My Device -> Display -> Uncheck Auto Adjust Screen Tone
Sent from my SGH-M919 using xda premium

mine does it. also, turning off auto tone doesnt help. with me at least

mine does it... unchecking the auto adjust doesnt help.

Most users wont notice it. Hell, I myself didn't notice it until someone pointed it out on their device and I tested and saw it. OCD kicked in.

Go in any app with the keyboard popped up and go into the Sun directly hitting the screen and you will see your screen flickering endlessly no matter what app your in
Sent from my SGH-M919 using xda app-developers app

Screen looking washed out

Have any other Z5 premium users noticed that sometimes when you wake up the screen it looks super washed out almost LG G3 esque for a second or 2 then it goes back to looking normal?
Just wondering if there's an explanation, it's a common thing or i have a faulty handset.
Thanks

Darkwun said:
Have any other Z5 premium users noticed that sometimes when you wake up the screen it looks super washed out almost LG G3 esque for a second or 2 then it goes back to looking normal?
Just wondering if there's an explanation, it's a common thing or i have a faulty handset.
Thanks
Click to expand...
Click to collapse
Don't think it's faulty. Very noticable to me on very dark screens. If you turn off Adaptive Brightness in settings this doesn't happen. It's just trying to adjust the screen to a proper brightness.

I have had the same issue.
Normally if I wake the phone up directly into an app that had a dark background i can easily see this. I find that pressing the recent apps key, selecting another app and then going back into the washed out app helps to remedy the problem if it does not sort itself out.

This happens for me as well. Note this also happened on my z3. Im not all that worried about it. The washed out display is usually sorted within a few seconds. If it bothers you that much, turning off adaptive brightness get rid of the issue as mentioned earlier.

I've taken to using Lux Auto, it resolved the issue.

They talked about it on the Sony forums, there's a bug in the adaptive brightness and Sony said that they are fixing it for the 6.0 update
Sent from my E6853 using Tapatalk

Always notice it when I leave my keyboard open and lock screen. When I unlock it later the keyboard looks all washed out then fades back to normal. Never bothered me though on this or previous Sony phones
Sent from my E6853 using Tapatalk

Cheers for the answers guess i'll wait for this 6.0 update to drop to see if it fixes it

Darkwun said:
Cheers for the answers guess i'll wait for this 6.0 update to drop to see if it fixes it
Click to expand...
Click to collapse
Good Luck
We're on 7.0 and it is still not working. My screen becomes the dimmest in sunlight or bright days, that's exactly when I need it the brightest and it becomes dim - Sonny ? or Funny !
I am tired of this phone.
May 5th.
So when I am tired I am trying the most crazy things....
Installed LUX Auto Brightness - 48 hours and not a single problem.
https://play.google.com/store/apps/details?id=com.vito.lux
I organized the application a bit, Min brightness 40% , Max - 100% , link your 0 lux ambient to 60% brightness and use other good stuff.
This application controls the Z5 Brightness so that it gives me what need.
Of course my Z5 adaptive brightness is OFF.
I can not explain how this does it, even me being an EE, but still Job is done.
This was very frustrating so you can understand my excitement.

An issue with calls dropping on S20 Ultra - Proximity sensor issue?

So I have a very weird issue and I'll try to explain the best I can;
For some reason, ever since the S10+ I've had issues with Samsung phones, I think its something to do with the proximity sensor that's now under the glass, I'll explain as I'm getting similar and more issues on my S20 Ultra.
So last year when I had an S10+ and when I was on a call, which I mainly use my left ear (I think my right ear is a few db less so I use my left) I would quite frequently seem to activate the menu (top right) and therefore end up pressing things with my ear, unbeknown to me, sometimes I'd add a 2nd person to the call or simply put the other person on hold! This happened a lot and I was close to sending it off for repair even though I used apps to test to ensure the proximity sensor was working correctly but in the end, I sold it and got an OnePlus 7 Pro, which I didn't have an issue with. During my time with the S10+ I noticed that even though I held the earpiece to my ear I could see the screen light up and that's where I think I'd end up pressing the screen accidentally as I've just explained.
Roll on to now where I'm facing similar issues but also I'm finding if I need both of my hands and therefore use my left shoulder to keep my phone against my ear the call disconnects as if I'm hanging up. Now it seems a straightforward resolution which is not to do that but I've never had this issue before and I've tested it out quite a bit when I do this the screen isn't on and my face is nowhere near the end button!! It's really driving me crazy at the moment and annoying my other half who's normally on the phone to me when this happens!!
Anyone got any suggestions or thoughts, does it happen to anyone else or am I just being stupid??
I haven't gone down the route of resetting the phone yet but I'm going to consider it.
T.I.A

Hi..don't have such an issue, but when i talk with someone longer, i turn off the screen with the Power button and so it stays the whole time black during call....
S20U-Exynos

Xode said:
Hi..don't have such an issue, but when i talk with someone longer, i turn off the screen with the Power button and so it stays the whole time black during call....
S20U-Exynos
Click to expand...
Click to collapse
I did that the other day, however, when I moved the screen away I saw it light back up....

maverick1103 said:
I did that the other day, however, when I moved the screen away I saw it light back up....
Click to expand...
Click to collapse
Yeah,weird a bit, try to go into the secure lock screen settings and do as i did...maybe it helps ..... like i wrote before, my screen stays black whatever i do while i talk...
View attachment 5012913
S20U-Exynos

Xode said:
Yeah,weird a bit, try to go into the secure lock screen settings and do as i did...maybe it helps ..... like i wrote before, my screen stays black whatever i do while i talk...
S20U-Exynos
Click to expand...
Click to collapse
Thanks, I've already got that enabled, will just have a play around.

maverick1103 said:
Thanks, I've already got that enabled, will just have a play around.
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Click to collapse
Hi , do you make it work? I have the same problem with my Samsung A71, I have been using all kinds of apps a no one make it work.
Sent from my [device_name] using XDA-Developers Legacy app

vrgolin said:
Hi , do you make it work? I have the same problem with my Samsung A71, I have been using all kinds of apps a no one make it work.
Sent from my [device_name] using XDA-Developers Legacy app
Click to expand...
Click to collapse
Not yet, still having issues.