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.
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I bought a Tab P1010 a fortnight ago. Generally been happy with it, but I've noticed something thats begining to annoy.
Just prior to going into standby, the backlight level drops slightly before going off. That seems to be the normal way things work.
However, on mine, the level goes to that stage randomly. Touching the screen may bring it back up after 5 seconds or so, but not straight away. And it happens even when I'm scrolling the screen and there has been activity going on.
Any idea?
Or have I got a return on my hands?
do you have "auto" set on your brightness?
I find when i have brightness set to auto it can go duller or brighter seemingly at random (particularly irritating if im reading)
i mostly manage my brightness level myself
Dont know if this is related to your issue ... good luck
dingoo12 said:
do you have "auto" set on your brightness?
I find when i have brightness set to auto it can go duller or brighter seemingly at random (particularly irritating if im reading)
i mostly manage my brightness level myself
Dont know if this is related to your issue ... good luck
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lol I feel such a fool!
I was fully aware of the auto back light setting and had already set it to the unchecked.
However at the weekend, I did a full factory reset. All settings had gone. However, it does show up how useless that setting is as the changes seem very random!
Cheers for the reminder.
Just picked up an ME572c and I'm very impressed for the price. However I have noticed the screen brightness levels keep fluctuating as if the light sensor is constantly detecting different light levels.
Has anyone else experienced this?
madgibbon said:
Just picked up an ME572c and I'm very impressed for the price. However I have noticed the screen brightness levels keep fluctuating as if the light sensor is constantly detecting different light levels.
Has anyone else experienced this?
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Click to collapse
Hi,
i notice this too, but that can be related to the power saving mode. Plz turn it off and check the settings in detail. Maybe that helps.
Further inside the developer options there is another option to configure the auto brightness.
You can change the behaviour from dynamic to immediately or slow mode and active an onscreen lux, gain and brightness value display.
Btw i am not satisfied with the auto control, as for my taste the brightness is still too low in a less lighted room. Sensor is reporting 0 lux already with a brightness of 14 which would be ok for a really dark room & night but not at daytime.
What is your experience?
I tried playing with power saving mode and the auto brightness controls in developer options. While I could reduce the fluctuations, I could eliminate them completely. Unfortunately I found it too distracting and returned the device earlier today. It's a shame as everything else was quite impressive for the money.
I also found the fluctuations annoying, my solution was to turn the auto-brightness off. Honestly I dislike auto-brightness on any device, it was also one of the first things I turned off on my laptop.
I am using Lux app now and raised minimum brightness at 0 lux. Thats ok for me now.
tycoo said:
Hi,
i notice this too, but that can be related to the power saving mode. Plz turn it off and check the settings in detail. Maybe that helps.
Further inside the developer options there is another option to configure the auto brightness.
You can change the behaviour from dynamic to immediately or slow mode and active an onscreen lux, gain and brightness value display.
Btw i am not satisfied with the auto control, as for my taste the brightness is still too low in a less lighted room. Sensor is reporting 0 lux already with a brightness of 14 which would be ok for a really dark room & night but not at daytime.
What is your experience?
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Click to collapse
Just bumping this to confirm this works and so that others can see. I used Developer options as well (before I found this post) and noticed the instant setting works best.
One more setting to also double check... Make sure that in developer options under auto brightness that you disable allow change gain...
Even with everything disabled it appears as if something still is changing the display. I particularly see it with something like a reddit browser when I'm viewing pictures. You click the pic, it loads and displays and then 1-2 seconds later the display adjusts based upon what is being displayed. Depending upon the picture it can be pretty annoying. I may have to root and start poking around to find out what is causing this.
with the lollipop update this issue is fixed for me.
Is lollipop really solve the problem?
muiriddin said:
with the lollipop update this issue is fixed for me.
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Click to collapse
Hello!
Im on lollipop, but the problem you had, still occur at me.
Did you noticed this problem, since you on lollipop?
I have the same problem. When i read, or browsing, the brightness changes in 2-3 steps.
We've used EasyProfiles Pro (profile manager) to activate various settings since HTC Desire days. One thing that the P20 Pro does when unlocking the phone is to reset the brightness to mid-way, over-riding the profile setting. Autobrightness is off.
During daylight hours this is not so noticeable but at night when the phone is unlocked it switches to mid-brightness despite the profile settings for minimum brightness. A tap of the profile widget restores it to dim, but each time we grab the phone it's very bright for night use.
I've looked through all the phone display settings and can't see any reason why the phone should revert to mid-brightness after unlocking when Autobrightness and Eye Comfort are off.
Developer of EasyProfiles has abandoned the app years ago so no actions possible on that front.
Can anyone confirm this behaviour ... turn off Autobrightness, set brightness to low, lock the screen, unlock, check brightness level?
CLT-L29, 8.1.0.130(C363)
Update ... been liaising with Huawei support, they suggested B150 would fix this. Update B152 was installed but did not help.
Further testing suggests the problem is the lockscreen always uses Automatic Brightness irrespective of the user settings. To test this I set the phone to a daytime profile, locked the phone, then went into a dark room. When I woke the phone the screen began to dim and when I unlocked the phone the brightness was very low.
Similarly, I chose the night profile and went into a lit room, the lockscreen brightened and unlocking forced the brightness higher.
Sounds like they're going to escalate this, assuming they can replicate the issue.
Hello,
Recently got this phone and very happy with it. Only issue I have found is that the screen occasionally dims randomly, not by a lot, but noticeable when it happens.
Adaptive brightness is off. System mode is set to dynamic.
Is dynamic system mode the issue? If so which is a good adaptive battery setting which won't affect the screen brightness.
Thanks in advance
I assume its due to the changes in refresh rate. Try setting the refresh rate to a single value (120 90 or 60) and i think you wont see the transition.
Same issue and I have adaptive brightness on. You will open an app and suddenly brightness will turn all the way down. Definitely a bug.
hirshr said:
I assume its due to the changes in refresh rate. Try setting the refresh rate to a single value (120 90 or 60) and i think you wont see the transition.
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Click to collapse
Thanks for the suggestion. I've tried this at 90hz, for reasonable battery, but it still does it.
Same here! Locked at 90hz, so that's not the problem.
I'm having the same issue. Adaptive brightness off, fixed refresh rate. I've only noticed it when I'm outside in bright light.
same problem.
have zenfone 7 rooted. locked to 90hz. adaptive brightness switched off.
anyone found a solution or cause?
I've noticed it happens when i tilt the phone.
and also when i have an app overlaid over main screen. like YouTube vanced minimised etc.
i think phone somehow might be switching brightness between the small app at the front and the main app on the back and doing it back and forth.
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.