Hi,
I change my sgs i9000 screen after breaking it.
Everything works fine but I can't change any screen parameter: luminosity (locked to a high value), color tunning (colors, gamma)... The screen can display several luminosity values (locked screen vs normal screen for example) but android settings (both in manual or automatic mode) doesn't affect it.
This high locked luminosity consumes a lot of battery :-/
After trying several roms and kernels (remics jb 2.0 & 3.1, c-rom mix v11) with all wipes and verifying luminosity sensor behavior I think the screen is responsible for this problem. I also tried to change luminosity with a dedicated app but no result.
Have you ever heard about such defective sceen or screen settings problem ? Any idea to reduce luminosity ?
Thank you in advance.
Regards.
Related
Hello. I updated my T to JellyBean two days ago. I turned auto-brightness off because I thought Sony changed something and it's was working differently - the screen was always as black as possible just like there was no light around me. I just checked Service Menu and Ambient Light Sensor data. Result? Constant "0" value wherever I am - in dark room or outside at direct sun. Do you have the same problem too? Maybe JellyBean breaks ALS for now?
Tapatalked from Poland using Xperia T
romcio47 said:
Hello. I updated my T to JellyBean two days ago. I turned auto-brightness off because I thought Sony changed something and it's was working differently - the screen was always as black as possible just like there was no light around me. I just checked Service Menu and Ambient Light Sensor data. Result? Constant "0" value wherever I am - in dark room or outside at direct sun. Do you have the same problem too? Maybe JellyBean breaks ALS for now?
Tapatalked from Poland using Xperia T
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Click to collapse
Mine says 0 as well, but i have no problem with the display, auto brightness works.
Are you saying auto brightness is broken on your phone?
Odp: [Help] Broken ALS on JellyBean?
Ummm yes. My bad I should have described it better. Yes I think it's broken, because ALS always shows "0" so the screen dims to the minimal value and it's totally ureadable outside with auto brightness turned on. When it's turned off it's ok, no problems at all.
I had no problems on ICS, auto brightness was always turned on and screen brightness was always set to the value where on the brightness widget that sun icon is "off" so it could adjust itself. And I had no problems in dark rooms where the screen was "correctly" dark and outside where it was very bright. Without manual messing with the brightness.
Tapatalked from Poland using Xperia T
ok,
does yur screen change brightnes when you turn auto brightness off in settings?
Odp: [Help] Broken ALS on JellyBean?
I have it turned off now I couldn't use the phone because screen was too dark.
But yes, the brightness changes:
Turning AB on = brightness does not change at all. After turning screen off and on brightness drops to the minimum like I was in a dark room.
Turning AB off = brightness gets back to normal just like it's set.
Tapatalked from Poland using Xperia T
Same for me, auto brightness act strange on my device too. When I thick "adjust brightness" sometimes nothing happends, not every time but it's not normal...
I'm just wondering, on ICS/JB, under brightness, mine had 'Adapt to lighting conditions' but I was still able to adjust the brightness :/
Does yours say auto brightness or adapt to lighting conditions?
SWFlyerUK said:
I'm just wondering, on ICS/JB, under brightness, mine had 'Adapt to lighting conditions' but I was still able to adjust the brightness :/
Does yours say auto brightness or adapt to lighting conditions?
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Click to collapse
Adapt to lighting condition/auto-brightness... In Polish it's "Dostosuj do oświetlenia" so in English it's "Adapt to lighting conditions" but commonly it's just called auto-brightness. I think it does not matter, we all know what's going on
Simply said - the tick option above the bar which you can adjust...
Constant "0" value read by ALS makes my phones screen always dark with auto-brightness on. Period On ICS there were no problems because ALS was working correctly.
EDIT:
I'll try to record a video and post it on youtube to show you my problem.
AW: [Help] Broken ALS on JellyBean?
Same here...auto brightnes act strange on my device with JB.
Gesendet von meinem XPERIA T mit Tapatalk
Thread can be closed - problem solved. I did a total wipe (formatting every partition except the ones connected with sdcards) in CWM and reflashed the FW. Then, after booting the device I did not check the option with restoring my saved data (Wi-Fi passwords, Settings settings etc.). The problem is gone but still auto brightness works so different when compared to the ICS one.
romcio47 said:
Thread can be closed - problem solved. I did a total wipe (formatting every partition except the ones connected with sdcards) in CWM and reflashed the FW. Then, after booting the device I did not check the option with restoring my saved data (Wi-Fi passwords, Settings settings etc.). The problem is gone but still auto brightness works so different when compared to the ICS one.
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Click to collapse
My phone does show ALS value of 0 as well.. but auto brightness seems to work..
ALS value = 0 for me too!
Brightness increases but not decreases until the screen goes off...
I got back to ICS and ALS works fine!
stedrum said:
ALS value = 0 for me too!
Brightness increases but not decreases until the screen goes off...
I got back to ICS and ALS works fine!
Click to expand...
Click to collapse
Yeah you are right. I can revive the thread somehow for any other people here. Also for me because auto brighness does not work again
But I don't care. I use manual brightness for a very long time and I got used to it. No annoying screen flickering and any other stuff
Autobrightness works, but a little different way than on ICS. ALS looks like it's off, but als_results file gives different results in different light conditions and the screen brightness really changes.
But sometimes the sensor stops working for some reason and you have to reboot to repair it. This happened to me between 2 or 3 reboots after fresh install of rom and now it's fine. (maybe a problem with illumination service).
But don't forget that the screen brightness is affected by thermal throttling and values from factory are very low. I think about 50% brightness at about 45°C xo_therm temperature.
I prefer ICS way...
it also happens in Xperia V JB ..
Hi all
Samsung Tablet 7" GT-P1000 was dropped and it would not power except the 4 four control buttons on bottom.
Changed display and digitizer (touchpad) and working o.k.
However brightness settings adjustment is not working both auto adjustment *and* manual adjustment. After booting, a slight variance is seen during manual adjustment but it still saves on bright. Second try no variance is seen during or after manual adjustment. Thus brightness remains fixed (battery is drained especially when reading and it is very uncomfortable to use).
Flashed from Froyo to Gingerbread firmware 2.3.6 to no avail.
Any suggestions please?
thanks and regards
Hello! I have a " MTCD " device in the view of the screen is very bad day , many reflections and low brightness unit. All settings are at maximum brightness .
Is there any way to increase the brightness to make the display more readable ?
Thank you
I have the same problem in my Chevy Impala
Sent from my VS985 4G using XDA-Developers mobile app
Dp78 said:
Hello! I have a " MTCD " device in the view of the screen is very bad day , many reflections and low brightness unit. All settings are at maximum brightness .
Is there any way to increase the brightness to make the display more readable ?
Thank you
Click to expand...
Click to collapse
Very strange. I assume you have also turned off the "Auto Brightness" setting in case you have a faulty light sensor? If so, you could either try a full factory reset (but you may lose apps so take a backup first) or contact the original seller for a fix under warranty. Could be an issue with the screen backlighting but that's not an easy fix.
Thanks for the tips !
Today I put a sheet matte to avoid reflections. The screen did not have any anti-glare treatment and has improved since the start this lamina . Still it remains a fairly low brightness ... Re-install the firmware but no change. I guess for nonse software can increase more ??
I think it's a hardware limitation on you screen, not software
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galaxy note 3 acheter galaxy note 4
The first issue regarding contrast settings is that on 10.2.28 at least, if I set the phone to "standard contrast", sometimes upon waking it, it forgets that setting and looks exactly as if set on "automatic contrast", even though standard is still checked. Just confirmed this as my screen looked rather blue, changed to "automatic" and it remained identical, then I changed it back to standard and it finally got the desired white balance.The point of "standard contrast" is that it should be CONSTANT, not ever changing... I've got the phone 4 days ago (enjoying it overall) and I've got to ask if this has been an ongoing issue or is it new in 10.2.28?
The second issue is that with auto brightness OFF, the phone still bumps to max manual brightness when the sun shines directly on the sensor. It's not as annoying as the first issue but I'd rather it would not do that. This is how the mi 9 behaved since release or just a new bug?
Ultimately, can you guys point me to the most effective way of reporting bugs to xiaomi?
I'm on the same rom version... I don't have any issues with contrast changing like you said but I'm on increased contrast at all times... There's no way of disabling the screen boosting brightness in sun light regardless of auto brightness settings... It's sunlight 2.0 mode and actually boosts the brightness higher then the max on the brightness slider.
Hi,
like other OLED phones, the ASUS Zenfone 8 suffers from PWM flickering in lower brightness. If you ever wondered why your phone seems flickery, unsettled or straining to the eyes in low brightness, this comes exactly from PWM flicker in the OLED display. (It's high frequency flicker so you won't notice immediately, but might be able to cause fatigue or eye strain, it is different from person to person) Dxomark had an article about this issue.
The ASUS Zenfone 8 has an option to enable DC dimming to mitigate PWM flickering in low brightness, according to reviewers and the display manufacturer. Stupidly, however, it is an option, not enabled by default. (Also only available in 60 Hz, but that's a minor restriction IMHO) In can be found under settings in stock ROM. But in my custom ROM (LineageOS), this option is not available anymore.
I am wondering if anyone found out a way to enable the DC dimming option in custom ROMs as well, maybe programmatically via. a control file, from command line, adb or whatever. Would be great to get this feature to non-stock-ROM usages as well.
I found out something, at least a workaround.
Dimming is actually quite straightforward in OLED displays, since there is no backlight. A grey value of 20% RGB in full brightness is the same as a white value (100% RGB) in 20% brightness. Literally. They are the same. In regular LCD displays, this would not be the same; there would be a huge difference in contrast between full backlight and reduced backlight.
Now, since PWM flicker only occurs in lower brightness settings, we can "trick" the display, set it to max. brightness and instead dim the display by just reducing all the RGB values by the percentage the display should be dimmed. The result will look exactly the same just without PWM. At least I haven't found any differences, also the colors are still very accurate despeite OLED displays are said to have lower color accuracy when dimmed via. DC dimming.
There exists some apps to replace the "hardware dimming" with "software dimming":
* [APP]OLED Saver (flicker free backlight dimming, no PWM)
* [APP] AMOLED PWMfree
I tried the first one (OLED Saver) and I am quite satisfied. I even found the custom brightness adaption way better than stock Android, since it reacts faster. And the difference between PWM and no PWM is really noticeable. Reading text in low light is much more pleasing now, much easier to the eyes, I can recommend you to try it out.
A drawback is that both of these apps reduce brightness via. a full screen overlay. Since most of us here have rooted phones, a much better solution would be to dim the display by modifying the system color settings. Similar to apps like CF.lumen which use this to implement night sight. Unfortunately, I haven't found an app doing this for brightness regulation. If there exists one, please let me know, it would be the ideal solution!
If custom ROM developers are reading this, would be a great feature to add to any ROM It is very straightforward to implement: Just decouple brightness regulation from the display driver; and reuse the brightness signal to alter the system color settings. I am sure that the ASUS DC dimming option does something like this as well.