[HOW TO] Improve screen quality Xperia T (?) - Sony Xperia T, TL, TX, V

Hey everyone,
As I've seen, many T users experience annoying and disappointing screen quality problem (dimming, auto-adjsting, washed-out colors, poor contrast etc). It's sad that aren't many solutions for that.
Some think it's just a hardware problem (cheap LCD) and live with it. I don't think so. Since I had TX before and the screen was superb - recently I thought what will happen if I flash stock TX firmware on T. The results were quite surprising. As I wrote on another post:
Everything worked just fine, phone booted without problems...
The bad thing: does not vibrate at all and the camera is messed up it's upside down, it won't focus and when tries to capture - freezes.
The very good part: THE SCREEN IS SUPERB, NO MORE DIMMING, AUTO-ADJUSTMENT, NO MORE BRIGHTNESS OR CONTRAST FADING it's unbelievable! The contrast is much better, no more washed out colors.
I'm not a developer and I don't have any knowledge about modifying system files, firmwares, kernels. But I know there's a way to make T's screen... normal.
What I managed to do so far: disabled Dynamic Luminance Scaling, as user peetr_ sugested here http://forum.xda-developers.com/showpost.php?p=34874453&postcount=151
The screen doesn't fade in and out anymore - so great improvement! White screen doesn't need seconds to become pure and bright after a black menu. But the background and contrast still remains a problem.
I installed Screen Adjuster from Play and set Brightness (NOT System brightness!) to 60-65%. The display seems a bit less brighter - and the fading black is totally gone.
I didn't find a tool or a solution to adjust the color/contrast. It's a kernel problem. If someone found a solution (or has an idea) - please share. As I wrote before, flashing TX firmware solves completely the issue (with the costs of having other bugs).

Related

flickering screen of NC

I played with my NC nearly one week and I like it. But I want to know dose anyone notice the screen of NC is flickering. If you couldn't understand what I mean, please refer to below video,
http://www.youtube.com/watch?v=iDnBSWF44rM
it is not so obvious in real world as in video, but it is noticeable and uncomfortable. I have ipad with IPS LCD but never find this kind of issue. It like some kind of low fresh rate issue in early PC screen, so I want to know whether it is possible to fix it via adjust screen refresh rate in OS level.
Your comments are welcome!
Mine does that but only on the gray background, otherwise I don't see any flickering.
I exchanged my first NC because of this issue. The salespeople thought I was nuts until I demonstrated it for them. My new one still does it but MUCH more faintly and not all the time. I do believe that Barnes & Noble is aware of it (or at least that's something I read in another thread here somewhere..).
It seems to only happen at middling levels of brightness. My first NC exhibited the issue under very specific settings and times, the brightness had to be set between 20%-40% and I had to be displaying a solid area of mid-range colors. I saw it all the time when the screen would dim to display a menu.
From personal experience, you MIGHT be able to get a unit that's better if you exchange. It does seem to be a very common issue, though. Rumor has it that it might be fixable through a firmware update.. we shall see.
I had a pocket pc with this problem many moons ago...The fix was to adjust a trim pot on the display...
No idea if anything like that would apply here, but just wanted to mention it.
I do have similar problem, could any people advise on how to check the refresh rate and increase it?
Many thanks.
Are you planning on rooting or installing another ROM on your Nook? The overclock kernels fix this issue.
from what I see there in the video, if that is what you are seeing...not refresh rate. Rather it looks like a cycling in the backligt control. Almost looks like the PWM duty cycle is out of wack...would explain why it happens at mid range of the brightness.
My first nook color had this problem, I solved it by leaving the brightness up all the time which seemed to prevent it. I got it replaced for other display issues, and my new one doesn't flicker at any brightness, so yeah it sounds like a defect.
Not a defect. It's a problem with stupid coding in the backlight driver.
They set the PWM (pulse width modulation) rate too low, at 40Hz if I remember right. It's easy to fix by setting it up to 60Hz in the driver, which I did in my old Quickie kernel. Totally gets rid of the flicker, and I've seen no side-effects, nor have any been reported to me.
I don't have the time to keep up with the kernel anymore, and for some reason no other kernel dev has pulled my driver fix into theirs. You might talk to Dalingrin or one of the other devs if you really want it, and put them in contact with me at [email protected] and I can help them get it integrated into their kernel.
Can you link to the github commit?
Tx
Sent from my HTC Vision using XDA App
Hmmmm.... my Nook definitely had the flicker issue on most gray colors, especially at dimmer brightness settings. I'm not using your kernel, but I am using Dalingrin's. I haven't seen flicker in months. Could this issue be limited to the stock ROM only?
911jason said:
Hmmmm.... my Nook definitely had the flicker issue on most gray colors, especially at dimmer brightness settings. I'm not using your kernel, but I am using Dalingrin's. I haven't seen flicker in months. Could this issue be limited to the stock ROM only?
Click to expand...
Click to collapse
It appears that way from my experience. I was running the dual boot package with stock and CM7 nightly.
The stock rom flickered very noticeably on greyish type backgrounds. Using CM7 and now Phiremod, the flickering has totally gone away.
Actually the fix is already in init.encore.rc:
Code:
write /sys/devices/omapdss/display0/timings 68000,1024/70/200/40,600/10/11/10
That said, it's going into the driver too.

Green tint when displaying white backround?

Hi. I just started playing with an SGS and am very impressed by it.
Mainly performance and beautiful, vibrant screen make the phone shine. In terms of display, it beats my Desire hands-down. But there's one thing I find odd - after flashing it with Darky's 7.5 Rom(to be fair, haven't tested with stock rom), the first time I entered the browser (with white Google start page) I felt as if I were an actor in "Matrix"
To me, it feels like the screen has a clear green tint when displaying white background.
I compared it to my Desire (to make sure it's not just my eyes), and even though its screen looks very modest compared to SGS's most of the time, it looks much "whiter" (tested on about:blank, both had max brightness, Desire is LCD model)
Unfortunately, I haven't tested it with the stock rom to see if it's software or hardware fault. My friend bought an SGS as well, and hasn't flashed it yet. Will compare to his phone.
Can't make a photo comparison - don't have a camera good enough to show such slight color tints.
Is there any objective way to test phone's color accuracy? Or to manually change the colors, like in old-school CRT monitors or TVs?
warnec said:
Hi. I just started playing with an SGS and am very impressed by it.
Mainly performance and beautiful, vibrant screen make the phone shine. In terms of display, it beats my Desire hands-down. But there's one thing I find odd - after flashing it with Darky's 7.5 Rom(to be fair, haven't tested with stock rom), the first time I entered the browser (with white Google start page) I felt as if I were an actor in "Matrix"
To me, it feels like the screen has a clear green tint when displaying white background.
I compared it to my Desire (to make sure it's not just my eyes), and even though its screen looks very modest compared to SGS's most of the time, it looks much "whiter" (tested on about:blank, both had max brightness, Desire is LCD model)
Unfortunately, I haven't tested it with the stock rom to see if it's software or hardware fault. My friend bought an SGS as well, and hasn't flashed it yet. Will compare to his phone.
Can't make a photo comparison - don't have a camera good enough to show such slight color tints.
Is there any objective way to test phone's color accuracy? Or to manually change the colors, like in old-school CRT monitors or TVs?
Click to expand...
Click to collapse
Try downloading the flashlight app that uses the screen as the light source then launch the app and check the screen. Or just input this in the keypad *#0*# and test the screen from there.
Hope it helps

[Q] [Experiment] TX firmware on T

Greetings everyone,
I have a quite dumb question, since I've seen many users trying to have T ROMs on their TXs - is it possible to boot a TX firmware or ROM on the Xperia T? Has anyone tried that? The main reason is the color saturation. I know it's probably 99% hardware problem, but I've entered Service Menu and checked Display. And it's perfect! Cear, pure colors, with deep and real black.
It's very frustrating to have that view problem, with dimming effect or what the heck it is...
When in Album (with BE activated) the differences are almost none between TX and T (T even has more clearity and sharpness, with some extra brightness).
By the way, I have already modified values in pre_hw_config.sh... Even installed an app that filters the screen (and managed to get rid of that autoadjustment effect!) but I'm still unsatisfied with the overall saturation, those washed colors in the UI... Some background color schemes seem to be painted, with distinct shades clearly seen (Album art background color, i.e.). That's awfull.
If the screen is differently calibrated - then why in the Service Menu the colors are excelent and almost the same as in TX?
That's why I think that are chances that 1% could be ROM or Kernel's fault. A software thing...
I cannot guarantee you these words are true but I've read somewhere that somebody did flash TX ROM on his T.
Except from other problem fixes, he also discovered that the WiFi signal reception got really better.
So I think nothing wrong could happen. We know a lots of cases when T ROM was flashed to TL or at least T ROM on TX (the only wrong thing then was broken XPERIA lighting). I think everything will be ok
My phone is T. Xperia T.
Thanks, now you maked me even more curious about this thing. I don't think something really bad will happen, like not booting at all, not being recognised by SUS or Flashtool etc. I hope so...
Maybe I'll try to flash tomorrow a stock TX ROM - and then report (also if there's a screen quality/behaviour changed). :cyclops:
FLASHED
I managed to flash TX firmware. Everything worked just fine, phone booted without problems...
The bad thing: does not vibrate at all and the camera is messed up it's upside down, it won't focus and when tries to capture - freezes.
The very good part: THE SCREEN IS SUPERB, NO MORE DIMMING, AUTO-ADJUSTMENT, NO MORE BRIGHTNESS OR CONTRAST FADING it's unbelievable! The contrast is much better, no more washed out colors... I knew it was a software issue!!!
Now... I don't know if it's just a kernel problem or not. I need unlocked bootloader to flash TX kernel, right? With LB and Flashtool won't work (by frashing TX completely and flash over T firmware with kernel "excluded"...)
Help, help, help!
romcio47 said:
I think everything will be ok
Click to expand...
Click to collapse
Do you have an idea? What should I do next?
You don't need unlocked BL to flash STOCK Xperia TX kernel. Stock kernel is signed by Sony and it will be accepted by your phone.
I don't know anything about fixing these problems, I'm no developer at all but I was thinking about creating a thread with some requests for TX libs and system files (WiFi etc)
Okay, I'll check if I could flash TX kernel over T original ROM somehow... And see if the kernel is the main problem of that annoying fade-in-out effect, washed colors etc.

[Q] Phone seems to forget it's a amoled... Screen is extremely washed out

Seems like my phone has forgotten it's amoled. It lights up the entire screen even if it's just black. The screen is overly bright and looks washed out and I can see tons of imperfections on it that seem to move with whats on the screen. This leads me to believe it's software, (happened a few days after a cm12.1 install) .
I've tried flashing stock images and it still persists. Anyone experience something like this? Not sure the best solution.
lower your brightness? what brightness do you keep it at?
Regardless of whether brightness is 100% or 0% the screen is overly washed out. It's as though the backlight is being turned on even if there are dark pixels on the screen. Everything is just way brighter and hard to read. Not sure if it's a hardware problem or software problem. Any way for me to determine this? Only thought would be a nandroid backup from my phone being restored on another to see if it recreates the problem but i don't have access to a second nexus 6.
Noxey said:
Regardless of whether brightness is 100% or 0% the screen is overly washed out. It's as though the backlight is being turned on even if there are dark pixels on the screen. Everything is just way brighter and hard to read. Not sure if it's a hardware problem or software problem. Any way for me to determine this? Only thought would be a nandroid backup from my phone being restored on another to see if it recreates the problem but i don't have access to a second nexus 6.
Click to expand...
Click to collapse
Can` t you go to store where they sell the Nexus 6 to compare? I reccon you`re on stock and don`t use a custom kernel for color control, my screen is beautiful imo. But also its possible that maybe you have a faulty device, it can happen ....
My screen was great. It's a recent issue that came up. It has happened in the last few days.

Low Brightness Flicker (LineageOS & Stock too?)

Hi, sorry if this was posted before, but with XDA moving to XenForo, search seems messed up, i did several searches and nothing comes up for "flicker" in this whole Pixel 4 XL Forum...
Has anyone else dealt with the low brightness screen flicker? I know it can't be just a bad phone, since i just bought three pixel 4 XL phones and they all exhibit this same behavior.
They are all running LineageOS (Official builds) so I don't know if this just affects the ROM or stock as well (although I've read it might affect stock phones too elsewhere).
It makes the phone pretty difficult to use in very low light situations, the screen will constantly flicker (more noticeable on darker backgrounds).
At first I thought it was just the Opera browser (as that's what I prefer), but it's operating system wide... Apps like "Darker" help.... because you can crank up the phone brightness and use a filter to dim the screen.... but it doesn't get the top & bottom menu/buttons, so those remain like spotlights in your eyes with that workaround.
Just curious if anyone knows whats up with this... it's the only phone I've ever seen this behavior on (and i've used Pixel 1,2,3 XL phones all with Lineage, and a myriad of other devices back in the Cyanogenmod days.... I've never seen a screen flicker issue like this).
Thanks for any help
edit / update-
the pro version of "darker" app works to fix this.... you crank the phones brightness to 100% and with the pro version you can dim the rest of the interface.
hopefully this helps anyone else suffering from this HUGE flaw (again i don't know if its just LineageOS or not, i didn't run stock on these except to unlock bootloader etc)
Hi,
I've seen it once and solved it by switching off smooth display. Not a real solution of course, but I never really noticed the difference between 90Hz and 60Hz anyway.
edwinek said:
Hi,
I've seen it once and solved it by switching off smooth display. Not a real solution of course, but I never really noticed the difference between 90Hz and 60Hz anyway.
Click to expand...
Click to collapse
hmm.... you running stock i guess? i don't see smooth display option in lineage

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