Develop Bugs

[Q] Does the Galaxy Note 8.0 have PWM?

It would be great if somebody can test it, thanks in advance.
How to test:
put a camera in front of the screen and play around with the shutter speed and the brightiness of the screen. When lines appears on the screen, its not good => pwm, without lines => good :good:
edit: i had links for pwm explanation, but not enough posts, sorry..

The question is about pulse width modulation, which I'm reading occurs when both of the following are true:
- you are using an LED light source with variable brightness
- you are using a camera with a rolling shutter
http://provideocoalition.com/aadams/story/pulse_width_modulation_is_not_your_friend/
The camera on the note 8 does not have an LED flash, so I think the poster either now knows that it won't be an issue, or is curious as to whether display brightness on the screen is controlled by pulse width modulation or a different technique.
In the latter case, I don't know, and since this is stuff that can't be seen by the eye nor in the viewfinder, but mostly in photo editing suites per the article I link to, I'm not sure why it's an issue here.

Hi roustabout
I think we dont speak about the same topic.
What I mean is the flickering of the display. A good example is found on youtube: Nexus 7: no PWM on LCD
A lot of LCD use this technology to dim, but its not proper dimming, just switch on / switch off the the lcd very quickly.
Some people have problem with this flickering but dont know that theres a problem, so for example dry eyes, getting tired very fast when working on the computer..
I think more the 95% of the usual monitors use this technique.
I hope this helps.

no, we're talking about the same thing:
'curious as to whether display brightness on the screen is controlled by pulse width modulation or a different technique.'
The article I found thinks it's not visible; what you've read or experienced suggests it's problematic.
What I can say is the first-gen ipad was very hard on my eyes; the note 8 is not like that, but not as good as e-ink. Much more fun than e-ink, though!

[Q] Galaxy S4 to LG G4?

Hello XDA community. I want to make the switch to the Verizon LG G4 and I'm exploring the features. I have gotten use to this Verizon S4 and want to know a bit more. One example is... I use the video settings on my S4 to limit for mms, does the LG G4 support this? I use it alot. Any others made the switch from the S4 that are having feature withdrawls? I just want to have a phone that has most of the same features and I don't want the S6. I need that expandable storage and battery. Thanks for having me here, I love this site and have used it for every phone I've had. Keep up the good work!

Hey so I didn't have the Galaxy S4 but I did just make the jump up from the Verizon version of the Galaxy S3. So far I'm happy with my new purchase!
Pros:
Camera and the screen - both awesome. Top Notch.
Fits in the front pocket of my favorite jeans! This could have been a deal-breaker.
I really like the curvature of the phone, makes it easier to hold and fit in your pocket.
I feel like I'm getting a better Verizon signal, haven't tested nor measured yet though.
Cons:
Battery life isn't bad but could be better. At least I can swap out replacements!
No root yet ...
I really miss installing custom ROMS, especially CM12.1 since it was getting so good.

Have you looked at the settings in video? I want to know if you can limit for mms messaging

I came from a Galaxy S3.
There were some things I'd taken for granted on my S3, which were not found on my G4.
- On my S3, I could turn the volume down to just Vibrate. And one more click would then turn off Vibrate, keeping it completely silent. On the G4, the volume control only turns it down to Vibrate, but no further. The S3 also showed a notification-bar icon for vibrate-only, and for fully-muted. The G4 does not show icons like that, so a few times I forgot to turn the volume up, and left it on vibrate-only in the morning.
- It may be a Lollipop thing, but the battery graph no longer shows bars for whether WiFi, GPS, or the screen were on, as well as whether the phone was Awake. A friend's S6 shows the same behavior, so again, it may not be an LG vs Galaxy change.
- The S3 camera let me set resolution, and metering styles (like Spot, vs Center-Weighted). And you can limit the video length, as you mentioned. The G4 camera app is fixed at full-resolution, and does not let you set a metering mode, even in Manual mode, as far as I can tell. You cannot set size limits for videos. I think the lowest video resolution is 720.
I returned my G4 within my 14-day return period, due to issues with it running warm, and short battery life. I should have exchanged it earlier, as a number of people with those issues have reported that replacements were better for them. I may give it a few weeks and buy one again. I'm in a similar situation to you, except coming from an S3, and I want something with SD and removable battery. My next choice is the S5, but there's a lot to like about the G4, I'm hoping the teething issues are sorted out quickly.

I'm currently using my Galaxy S4 and just bought the G4 a week ago. I'll probably keep using my S4 until the G4 has root. I can't find any option to limit the video size for mms. The only options are UHD, FHD, HD and slo-mo. There are NO modes for things like HDR, Twilight, Fireworks, etc. for the camera either. Your only options are Auto, Panorama and dual. There is an option to turn HDR on or off, but it's for all pics.
I love the manual camera options, and I like the screen much more than my S4's screen but there's not much else that is better (or as good as) my S4. If we get root, I should be able to tweak things to my liking & the G4 should be as impressive as my S4. I'm used to having full control & flashing ROMs.

Hi!
I come from a S4, and it really worth it. You have better camera, screen, etc. Everything is better (except battery life, which is a bit bad right now). I have the phone since a week ago and I'm quite happy with it. I don't miss my S4 at all (except for root and things like that, but it's question of time)
I cant' answer to the mms question because I have never use it, but I don't think you can do that with the G4. But maybe there's an app for that?

Thank you for your help. I'm going into the store and playing with this thing before I make a decision. I guess a hands on experience will either make it or break it. I wish the S6 had a removable battery and SD card slot, or... offer up that 64GB version at verizon. I run into space problems as it is with my S4. I can't imagine not having an expansion option. Also, is it true that Verizon limited the expansion to 200GB on the G4 instead of the 2TB that LG gave it? Why oh why must these companies mess with a good thing? Sigh...

LG G4 !!
Having had the samsung galaxy s4, the G4 and more efficient lg .
Negative point at LG: the empty battery too quickly

@CrustyMcLovin and @RedOCtobyr
Could you please elaborate more on battery life of G4 compared to S3. According to Phonearena info, on stand-by only S3 lasts 2.5 times longer then G4. Is it really the case? Is the battery of G4 that poor?

user9999 said:
@CrustyMcLovin and @RedOCtobyr
Could you please elaborate more on battery life of G4 compared to S3. According to Phonearena info, on stand-by only S3 lasts 2.5 times longer then G4. Is it really the case? Is the battery of G4 that poor?
Click to expand...
Click to collapse
Sorry I don't have any numbers just to share, just my anecdotal experiences.. in that regard Id say the G4 battery life is similar to that of my Galaxy S3. That isn't bad but it's just not nearly as good as the reported battery life from some of the newer flagship devices. Either way I gotta say that when people post that they get 5+ hours of screen-on time that it's hard to believe.

I don't expect hard number. Your "feeling" is OK Thx

CrustyMcLovin said:
Sorry I don't have any numbers just to share, just my anecdotal experiences.. in that regard Id say the G4 battery life is similar to that of my Galaxy S3. That isn't bad but it's just not nearly as good as the reported battery life from some of the newer flagship devices. Either way I gotta say that when people post that they get 5+ hours of screen-on time that it's hard to believe.
Click to expand...
Click to collapse
I would agree with this summary.
I returned my G4, and have gone back to my S3 for now. The battery issues with the G4 got me paying more attention to the run-time on my S3.
It looks like I've had GSam installed since right after I got my S3 in December 2012. According to GSam, if I'm reading the page correctly, under "Averages Per Complete Charge", it says my Screen On Max is 2:15. Maybe meaning that I've never exceeded 2:15 of SOT? That doesn't seem very impressive at all, but I'd believe that number.
My signal at work varies. In some areas of the building I have no signal at all. So depending on where I'm spending time during the day, my battery can see a bigger drain. But nowadays, if I'm using the screen much at all, I typically try to put my S3 on the charger during the day, to avoid the battery sometimes getting low towards the end of the day. While I had my G4, I was finding similar behavior, I'd need to put it on the charger again at work. Mine was running warm, which probably didn't help.
The S3 is using a 2.5 year old battery, though, and the G4's battery is almost 50% bigger (3000 vs 2100). So seeing similar run-time was not impressive to me, on my particular G4.

Pixel 3 XL Brightness Issue

Does anyone have any brightness issues? I just got my XL today and the brightness is very weak and I'm very disappointed. I uploaded a video onto Youtube so you can see the issue. Let me know....
https://youtu.be/pTjE4wi2Vc0

i'm not having any brightness issues at all.

freebee269 said:
i'm not having any brightness issues at all.
Click to expand...
Click to collapse
but is it bright or just meh? That video with 50% brightness compared to the 5t has it really sucking on the Pixel. UrAvgConsumer also mentioned a few times that the brightness wasn't that great.

It looks bright even outdoors from online reviews I've seen.

minhtluu said:
Does anyone have any brightness issues? I just got my XL today and the brightness is very weak and I'm very disappointed in a 900 phone. I uploaded a video onto Youtube so you can see the issue. Let me know....
https://youtu.be/pTjE4wi2Vc0
Click to expand...
Click to collapse
If not already, turn off adaptive brightness on the P3XL like it is on the 5T and compare again. If it is already off I'd like to see the setting in another vid..

The 2 XL was the same on Pie.. I had to set the brightness to 80% ... it's not a display problem it's software for sure..

cryppie said:
If not already, turn off adaptive brightness on the P3XL like it is on the 5T and compare again. If it is already off I'd like to see the setting in another vid..
Click to expand...
Click to collapse
The adaptive brightness was definitely off. I was going to make another video but Google Support called me before I uploaded the video. They told me it was working as designed. I'm not going to argue with them. If they don't see an issue with it, they aren't going to fix it. I'm just going to return the phone.
I'm not one to spend a lot on phones, in the past I've owned the Nexus S, 4, 5, 6P, Oneplus One and 5T which were all reasonably priced phones. This was my first phone I decided to splurge on and I felt it wasn't worth the price I paid. Yes, the brightness isn't that big of a deal but for $969.68 I expect a perfect phone.
I hope the brightness issue is a non-issue for you folks.

NICEGYPT said:
The 2 XL was the same on Pie.. I had to set the brightness to 80% ... it's not a display problem it's software for sure..
Click to expand...
Click to collapse
Was the brightness control more linear on Oreo?

https://forum.xda-developers.com/pixel-2-xl/help/android-p-wth-brightness-t3825844
https://www.androidpolice.com/2018/...c-brightness-slider-introduced-android-p-dp3/
https://forums.androidcentral.com/g...ubt-about-display-brightness-android-pie.html
The slider values have changed from linear to log. No need to worry just move slider more to right and it will be just as bright as before.

Weak/dull max screen brightness in Pie with manual mode (no auto!)

Hi Guys! i just bought an S9, and its very new, made in march, came with Pie.
I find the maximum manual brightness setting to be way weak and dull for my taste.
Average lit room in the daytime, chrome browsing, evernote editing etc.
When the background is white.
I tried out an s8+ and an LG V30 in the last few weeks, had those on my hand, and they had way stronger brightness and starker whites on normal mode. I had to lower them to ~80% to be comfortable.
This completely baffles me as all the reviews stated that s9 has higher NIT than the above phones.
Grateful for advice. shoud i try another factory rom, downgrade to oreo, or up to the newest pie?
Or is this a hardver limitation and cannot be changed?
thx for any info! :highfive: :good:
ps: i googled but everyone is talking about the AI auto brightness mode, tried that, that doesnt change the available maximum, only in direct sunlight.

kbuss said:
Hi Guys! i just bought an S9, and its very new, made in march, came with Pie.
I find the maximum manual brightness setting to be way weak and dull for my taste.
Average lit room in the daytime, chrome browsing, evernote editing etc.
When the background is white.
I tried out an s8+ and an LG V30 in the last few weeks, had those on my hand, and they had way stronger brightness and starker whites on normal mode. I had to lower them to ~80% to be comfortable.
This completely baffles me as all the reviews stated that s9 has higher NIT than the above phones.
Grateful for advice. shoud i try another factory rom, downgrade to oreo, or up to the newest pie?
Or is this a hardver limitation and cannot be changed?
thx for any info! :highfive: :good:
ps: i googled but everyone is talking about the AI auto brightness mode, tried that, that doesnt change the available maximum, only in direct sunlight.
Click to expand...
Click to collapse
My S9's screen is very bright in almost every situation. Even in sunlight, I can see everything clearly in auto brightness. Indoors I just keep it below 50% and it's still plenty bright. Try reporting this issue or go to a samsung service centre to fix it or replace your phone....
Wait, do you use any kind of power saving? Because in power saving mode there's an option to reduce the brightness 10%, make sure it's off.

jamil aboudaher said:
My S9's screen is very bright in almost every situation. Even in sunlight, I can see everything clearly in auto brightness. Indoors I just keep it below 50% and it's still plenty bright. Try reporting this issue or go to a samsung service centre to fix it or replace your phone....
Wait, do you use any kind of power saving? Because in power saving mode there's an option to reduce the brightness 10%, make sure it's off.
Click to expand...
Click to collapse
no and like i said its on manual, maxed out.

guys i just looked into a measured review of the screen brightness.
can it be that when the whole screen is white, its actually less bright than the s8?
340 vs 403 nit?
(the titles are not in english thats why i blurred them )

Question Possible screen dimming / heat issue ?

Hello everyone,
I have seen tech youtubers test the F3 and some mention that it will dimm the display quite a lot when gaming. (also another one did 4k video shooting for extended time and seen the same thing)
Do you think this is because the SD870 really "could" have an heat issue in the F3 and the software is protecting the AMOLED from damage due to overheating?
However I am still looking forward to receive mine, I just want to utilize the bright display at least during normal usage

Not sure what happens, I'm seeing the same stuff on diferent video reviews of Poco F3, the thing is, Poco X3 or Redmi K40 Pro usually go even beyond 10+ºC higher and do not suffer of such dimming issue. I'm guessing it's something software related.

Yes agreed, the SD888 devices get hotter and do not show this behavior.
Let's pray it's a software issue.
Could also be that the E4 Samsung panels really do need to derate because of their really high brightness. Even a 50% reduction would be as bright as my F1's screen at max. brightness

I am reading in local Malaysian forums they talk about comments in Xiaomi forum for k40 having such issue. I don't understand mandarin I am based on what they said its an issue with K40. Let's hope software upgrade could fix this issue.

Saw the same problems in some reviews yet a member of this forum who already has it had some issues with haptic feedback others have battery problems. I think I will buy another phone

MySelf_v1 said:
Saw the same problems in some reviews yet a member of this forum who already has it had some issues with haptic feedback others have battery problems. I think I will buy another phone
Click to expand...
Click to collapse
Well quality problems exist everywhere. Check out the S21 Ultra forum, there big discussions about poor camera quality are ongoing.

MySelf_v1 said:
Saw the same problems in some reviews yet a member of this forum who already has it had some issues with haptic feedback others have battery problems. I think I will buy another phone
Click to expand...
Click to collapse
Yeah don't get me wrong, only having a slightly noisy haptic feedback motor is not a bad result. When I bought my Oneplus 3 back in the day, the USB-C port was slightly offset, so the cable wouldn't fit snugly and dash charging wouldn't work. I've reported my problem with the haptic feedback motor on another forum and people seem to agree it is slightly noisy, but other than that the phone works like a charm for me (so far).

@Kom_zo That is reassuring to hear, glad you enjoy it
Maybe this was Xiaomi's design intent all along to have a more "audible" motor.
I will check it out once I have it here.
Did you experience any high heat and unintended dimming so far?

I have not had the chance to use my phone intensively yet, just some light browsing and Youtube/Netflix. I have however just made a video of the haptic feedback sound and I can tell you that this is not by design (the popping noise is coming from the phone, not the recording)

@Kom_zo Thanks for sharing!
Agreed, it definitely sounds not normal - somehow like a hollow "clicking".
Is it bearable or will you return it?

I have haptic feedback turned off by default, but my phone will vibrate for alarms/notifications and calls. As of right now it might just sound broken, but it is a moving part that could cause more damage to the internals of the device. I will try to swap it for a white model in a few days, but I think I will return it either way.

GeForce66 said:
Hello everyone,
I have seen tech youtubers test the F3 and some mention that it will dimm the display quite a lot when gaming. (also another one did 4k video shooting for extended time and seen the same thing)
Do you think this is because the SD870 really "could" have an heat issue in the F3 and the software is protecting the AMOLED from damage due to overheating?
However I am still looking forward to receive mine, I just want to utilize the bright display at least during normal usage
Click to expand...
Click to collapse
This is comment mind you frm Malaysian forum. I don't know anything about amoled

Zenkilla said:
This is comment mind you frm Malaysian forum. I don't know anything about amoled
Click to expand...
Click to collapse
I agree with the statement from the Malaysian guys, it makes sense.
However there is a video from the same youtuber which shows Black Shark 4 vs F3 and the BS4 doesn't dimm the display.
Though I don't know which brand/type of amoled the BS4 uses.
Edit: Found it, watch from minute 2 onwards:

Is there any green tint with low brightness?

bassbounce said:
Is there any green tint with low brightness?
Click to expand...
Click to collapse
Shouldn't happen, since the F3 uses PWM for the amoled screen which eliminates color shift at low brightnesses.

This problem happen too when you off auto brightness ?

I think the tech youtube has set it to manual max. brightness.
I can only assume it will limit brightness at high temps regardless if you are on auto or manual.

I might get bashed for this but you can underclock and undervolt the GPU with KonaBess: https://github.com/xzr467706992/KonaBess
It's worth a shot if you don't game a lot, it'll likely not overheat causing the screen to dim as much.
I still feel the screen dimming will be reduced with the upcoming MIUI 12.5 update for the F3.

POCO said on a live stream that they are working on the dimming problem.
42:59 and at 1:06:19

Bonondo said:
POCO said on a live stream that they are working on the dimming problem.
42:59 and at 1:06:19
Click to expand...
Click to collapse
Excellent, thanks for sharing this information!