Screen brightness repeatedly going up and down - Sprint LG Optimus G

Was reading some stuff on the web today and the screen brightness went down, then about 15 seconds later up, then it went down again, up, down, etc. Drove me nuts, had to stop reading. Times between changes were maybe 15-20 seconds apart. I lowered the brightness to 50% and it still did it.
What gives?

Do you have auto brightness on ?

Nope, Auto Brightness was/is not on.

I know there was an issue in the beginning when the device gets hot or thinks its hot, it will decrease brightness.
Sent from my LG-LS970 using xda premium

_Epic said:
I know there was an issue in the beginning when the device gets hot or thinks its hot, it will decrease brightness.
Sent from my LG-LS970 using xda premium
Click to expand...
Click to collapse
Agreed. Most likely the phone is getting hot and lowering the brightness to help it cool off a bit. Can you be more specific on what you are doing when this happens?

Yeah, I've read about the heat thing. I've seen that message pop up once on my phone a while back. If it lowers brightness I'm OK with that if it would just stay lowered (and if, in fact, that was the problem with my phone.) Like I said, I lowered it myself but the problem persisted. It started doing this when I was reading some stuff online. No video, no outrageous number of apps running in the background - maybe 3 or 4? I sent one text and one email, that's it. I noticed all 4 cores were on so I turned on Eco Mode and still had the problem.

Colonel Travis said:
Yeah, I've read about the heat thing. I've seen that message pop up once on my phone a while back. If it lowers brightness I'm OK with that if it would just stay lowered (and if, in fact, that was the problem with my phone.) Like I said, I lowered it myself but the problem persisted. It started doing this when I was reading some stuff online. No video, no outrageous number of apps running in the background - maybe 3 or 4? I sent one text and one email, that's it. I noticed all 4 cores were on so I turned on Eco Mode and still had the problem.
Click to expand...
Click to collapse
Keep ur brightness at 60 or below and it won't do that.
Sent from my LG-LS970 using xda app-developers app

I've noticed it only happens to me when the phone is plugged in and the screen starts doing its lag thing. I figured the two were related (that whole voltage bug)

Related

[Q] Tracking down Wake Lock

Hey guys,
This has been bothering me for a while now, but on occasion, my phone just stops sleeping. I attached a screen shot to show what I mean.
It happened on stock, so I've tried a couple other kernels, but they have the same problem.
Any suggestions?
Sent from my SPH-D710 using xda premium
trifthen said:
Hey guys,
This has been bothering me for a while now, but on occasion, my phone just stops sleeping. I attached a screen shot to show what I mean.
It happened on stock, so I've tried a couple other kernels, but they have the same problem.
Any suggestions?
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Yes, probably you're experiencing the "AndroidOS" runaway issue. This is a nebulous and currently unresolvable issue, probably related to some Samsung/Sprint driver issue(s) causing feedback loops between the events/0 and suspend processes. It seems to be fixed temporarily by a reboot, or just randomly. It may or may not be associated with excessive battery usage.
I used to get those solid awakes, but then I froze a lot of apps and it went away.
I didn't do it systematically to figure out which was the cause.
As an aside, if you have an older version of FlightView, then that could definitely cause the issue. That isn't a stock app, but is somewhat popular and had a bug keeping the phone awake *even though it wasn't configured to do anything*.
Kn0wBuddy said:
Yes, probably you're experiencing the "AndroidOS" runaway issue.
Click to expand...
Click to collapse
Ironically, my AndroidOS has always been high (almost always higher than display), but it would always sleep just fine, and my battery-life was pretty good. But every time this happens, my AndroidOS is actually lower than usual.
So I've temporarily disabled Juice Defender (just in case it was interrupting something and confusing it into holding a wake lock) and removed the Facebook widget (Better Battery Stats had that listed as 50% of the wakeup events, which is just ridiculous).
I set a custom reference point so I can watch it for a while and see if anything weird pops up. It seems to be happening more often in the last week or so, and the only thing I did back then was remove Watchdog, because I haven't gotten any alerts for about a month.
I have noticed that usually when it gets stuck in an awake state for a long time, it also coincidentally has a stealth LOS, and rebooting will magically cause texts and voicemails to appear. Let's hope the December radio update fixes that problem.

Juice defender!?

Is juicedefender works on nexus?
Sent from my Galaxy Nexus using XDA App
attacker said:
Is juicedefender works on nexus?
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
Yes, and also a lot better than it did on my HTC Sensation!
animaleyes76 said:
Yes, and also a lot better than it did on my HTC Sensation!
Click to expand...
Click to collapse
Do you feel it really increases battery time?
I am currently trying out Juice Defender free on the standard preset for my unmodded Galaxy Nexus. Unfortunately I am not thinking that I am going to continue with it.
So far it has crashed my phone to reboot (first time that has happened) and when not using my 4g it turns it off but it takes forever for it to come back on once I want to use the phone and it gets pretty frustrating having a useless phone for about 5-8 minutes everytime I pick it up.
I hope you have better luck than I am having.
sjankis630 said:
I am currently trying out Juice Defender free on the standard preset for my unmodded Galaxy Nexus. Unfortunately I am not thinking that I am going to continue with it.
So far it has crashed my phone to reboot (first time that has happened) and when not using my 4g it turns it off but it takes forever for it to come back on once I want to use the phone and it gets pretty frustrating having a useless phone for about 5-8 minutes everytime I pick it up.
I hope you have better luck than I am having.
Click to expand...
Click to collapse
Strange. It's never done any of that on mine. I'm on HSPDA+ though.
As for whether if makes a difference I'd definitely have to say a big yes. But it all depends on how you use your phone.
Ultimate working nicely here. Syncs every 15 min like it should. Screen is eating 60-70% so it makes only a small difference.
Sent from my Galaxy Nexus using xda premium
I bought ultimate, and found it to be a bit of a hog. I then turned off all the extra stuff and went back to the basic setting - the same as the free version, and noticed very little difference.
I think it might help you if you're one of those people who accidentally leaves radios on, or don't have high signal most places you go. For me a UV kernel made the only real difference.
It works well but not saving as much battery as it did on Gingerbread. Default Android idle-time battery management seems to have got much better.
Sent from my Galaxy Nexus using Tapatalk
animaleyes76 said:
As for whether if makes a difference I'd definitely have to say a big yes. But it all depends on how you use your phone.
Click to expand...
Click to collapse
This. I see a nice increase in battery life while I'm not using it, but if I have it on a lot (which I usually do) the battery gets drained pretty quickly.
I keep my phone on CDMA mode most of the time, unless I need to download something or want to watch a movie, then I switch to CDMA/LTE. I'm still not sure how much it helps though, as I've only had the phone for a little over a week.
For me, JD Ultimate works wonders. Especially when I'm at work and not playing with the phone too often and having only 2 signal bars, JD enables radio every 30 mins to allow apps to sync. It also manages my brightness automatically, which results in screen usually taking less than 50% of battery.
In general it helps me a lot, like it did on SGS2. My night schedule uses airplane mode and I only loose 2-3% over night.
I would have to remember about too many things if not using JD, so for me well worth it.
schriss said:
For me, JD Ultimate works wonders. Especially when I'm at work and not playing with the phone too often and having only 2 signal bars, JD enables radio every 30 mins to allow apps to sync. It also manages my brightness automatically, which results in screen usually taking less than 50% of battery.
In general it helps me a lot, like it did on SGS2. My night schedule uses airplane mode and I only loose 2-3% over night.
I would have to remember about too many things if not using JD, so for me well worth it.
Click to expand...
Click to collapse
I thought brightness worked only in the beta version. Does it work in the release now?
pedmond said:
I thought brightness worked only in the beta version. Does it work in the release now?
Click to expand...
Click to collapse
It does, i never used beta and JD controls my brightness. Remember there is a bug related to manual apk install where you cant tap install. I still use JD for brightness, just disable it in quick menu when manually installing apps then reenabling right away.
Sent from Galaxy Nexus using Tapatalk
schriss said:
It does, i never used beta and JD controls my brightness. Remember there is a bug related to manual apk install where you cant tap install. I still use JD for brightness, just disable it in quick menu when manually installing apps then reenabling right away.
Sent from Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Thank you for your answer.
When JD is managining brightness, if the phone is asleep, when waking it up with the power button the screen comes full brightness and then settles to a lower level, which is quite annoying. Do you see this happening too?
pedmond said:
Thank you for your answer.
When JD is managining brightness, if the phone is asleep, when waking it up with the power button the screen comes full brightness and then settles to a lower level, which is quite annoying. Do you see this happening too?
Click to expand...
Click to collapse
no, for me it wakes up with the brightness that was in use before going to sleep.
Sent from Galaxy Nexus using Tapatalk
why use juicedefender and similar app when, in the gnex pure android, there is no bloatware up in background? >_>
schriss said:
no, for me it wakes up with the brightness that was in use before going to sleep.
Sent from Galaxy Nexus using Tapatalk
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Click to collapse
That is totally weird, cause mine seems to wake up high and only then lower the brightness. I wonder if it's ROM related, although I'm on stock kernel 4.0.3.
pedmond said:
That is totally weird, cause mine seems to wake up high and only then lower the brightness. I wonder if it's ROM related, although I'm on stock kernel 4.0.3.
Click to expand...
Click to collapse
Make sure system brightness is set to Auto. And I use Filter Mode in JD. Sensor is set to Normal.
---------- Post added at 01:51 PM ---------- Previous post was at 01:48 PM ----------
Abufinzio said:
why use juicedefender and similar app when, in the gnex pure android, there is no bloatware up in background? >_>
Click to expand...
Click to collapse
Beacuse, believe it or not, it provides functions that some people find useful. Same goes for LightFlow, if you like the white-only color led notification of pure android, then you don't need this app either. If you prefer more colors/choices, then you do.
schriss said:
Make sure system brightness is set to Auto. And I use Filter Mode in JD. Sensor is set to Normal.
Click to expand...
Click to collapse
You got me there. What filter mode? Can't find that setting. I must be blind...
I can't get rid of that flicker and for some reason it bothers me....
pedmond said:
You got me there. What filter mode? Can't find that setting. I must be blind...
I can't get rid of that flicker and for some reason it bothers me....
Click to expand...
Click to collapse
I have no flicker. Filter Mode is unusually placed in Help section I have it enabled.
I purchased JD Ultimate yesterday so I can't really comment on how well it is improving my battery life. I will say that I am having issues going back to LTE when the screen is unlocked (Using the network mode setting). The phone keeps going to WCDMA instead of LTE. However, I noticed that since I have been using JD Beta 3.8.8, version 3.8.9 has come out and has addressed a few of my issues. The configure apps now works without crashing JD. I still don't know if the LTE is functioning incorrectly as I haven't had time away from my computer (I have no Wi-Fi at my hotel and must tether).
Is anyone else experiencing issues with the phone going to WCDMA mode after the phone wakes up? Also, what version of JD are you using?

Autobrightness bug

Hello little birdies.
I am having an issue with my auto-brightness and I would like to know if anyone else has experienced this.
Whenever my auto-brightness shines through the power of the sun (goes to 100%) it seems to get stuck at full brightness and my already not so good screen-on time takes a dip and I always notice this too late . I use the quick settings widget which is preinstalled and the A for auto-brightness is set but when I click it the screen immediately lowers the brightness, while the A for auto-brightness remains, and a vain in my forehead pops.
Furthermore after checking badass battery monitor it shows that my screen is often at 100% sun shadowing brightness. Today it was at full mutated power the whole time. Anyone got an idea as to what could cause this? Anyone?
PS. You might have noticed in the text above that I think the screen is really bright when at full power and that I can see the screen perfectly during a warm ball-soothing sunny day.
Yes, I have a bug with auto brightness too. It seems to deactivate itself. I have activated it a couple of times and everytime it deactivate itself at 100 % after some use.
I have an international HTC One X with the latest 1.29.401.11 update.
Glad to know I'm not the only one. I will soon factory reset my phone to check if it magically gets better.
I noticed this last night. My phone was blindingly bright and I didn't understand why it was set to 100%. I set it back to Auto and so far its still on Auto. i will have to keep an eye on this.
HTC really need to fire the monkeys they have working as coders. I guess if their software is not fixed up in next couple of weeks there might be a whole lot of people, me included, who will migrate to the SIII (given of course that it doesn't have a gazillion bugs as well).
I've been trying all day to recreate the problem but ist not doing it. I put my phone in the sun, I tried using the camera app, I used the video app with its 100% brightness setting, but the phone is still showing Auto brightness.
Any ideas on what triggers 100% brightness?
I have the same problem with mine. It's just randomly turns off auto brightness
Sent from my HTC One X using xda premium
I don't know either what triggers it. It seems to deactivate at either 0 % or 100 %.
I don't have many apps installed, if I just do some web surfing and put it to sleep, when I wake it up the auto brightness is deactivated, in maybe 1 of 4 times. Irritating.
For whatever reason i haven't been getting the auto brightness bug for the past three days. Not sure how it resolved itself since I didn't get any software updates.
If you watch a video you can change the brightness and will stick and not go back to your original settings.
Sent from my HTC One X using xda premium
treebill said:
If you watch a video you can change the brightness and will stick and not go back to your original settings.
Sent from my HTC One X using xda premium
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Click to collapse
No, that's not the trigger. I investigated that on my phone and found no link.
I take that back. You are right! It seems the brightness setting in the movie play is the culprit. Although it doesn't always do it. One more thing for the chimps at HTC to fix.
Sent from my HTC One X using XDA
Yesterday the auto brightness bug kicked in right before my eyes. I was browsing the web in total darkness in bed, when suddenly I was blinded by 100% brightness. So it's not just the movie player brightness that causes this issue.
Sent from my HTC One X using XDA
Just got the autbrightness bug with the camera app. Everything seems to ****ing set it off now.. :banghead:
Sent from my HTC One X using XDA
Yeah. That's because the camera jacks up brightness for outdoor visibility. They need to have an option to disable that.
Sent From Mars
Hotzigetty said:
Yeah. That's because the camera jacks up brightness for outdoor visibility. They need to have an option to disable that.
Sent From Mars
Click to expand...
Click to collapse
I realize that, however it doesn't always do it. Also sometimes it will kick into 100% brightness without using the camera or movie player. It seems completely random to me.
mine is stuck at zero. started this morning and I did record a video actually.
auto just takes it.to zero.
but also, if i change it directly from the srttings menu, its not.effecting at all, just staying at the same previous custom level.
whrn using widget, just turns it to zero.
opened the video player, changed brightness level and its normal now. it was in the middle, the video brightness level
ok just edited this post and its malfunctioning again.. arrrgh!
Try an application that controls autobrightness, it should fix the problem. I would recommend Lux Dash.
So it is the widget, powertoggle.
Once I fix the issue by changing video brightness, it works fone, till I toggle the widget to use auto-brightness.
Several comments on PlayStore also confirms this with several phones.
Just don't use auto brightness from powertoggle. It is actually doffetent.from what OP describes, but.people may come up to this thread while searching, so I think it willbe useful to post here.
hxhx
i meet this problem
Auto brightness issue
I too had the same issue, i tried to resolve the problem with htc but unfortunately they said that it is a software but and we need to wait for an update....
ynischa said:
Hello little birdies.
I am having an issue with my auto-brightness and I would like to know if anyone else has experienced this.
Whenever my auto-brightness shines through the power of the sun (goes to 100%) it seems to get stuck at full brightness and my already not so good screen-on time takes a dip and I always notice this too late . I use the quick settings widget which is preinstalled and the A for auto-brightness is set but when I click it the screen immediately lowers the brightness, while the A for auto-brightness remains, and a vain in my forehead pops.
Furthermore after checking badass battery monitor it shows that my screen is often at 100% sun shadowing brightness. Today it was at full mutated power the whole time. Anyone got an idea as to what could cause this? Anyone?
PS. You might have noticed in the text above that I think the screen is really bright when at full power and that I can see the screen perfectly during a warm ball-soothing sunny day.
Click to expand...
Click to collapse

Help with setting my battery straight

On BBS, My kernel and partial wake locks are mostly under control as far as percents but they have some seriously high wakeup counts. For example, "Key events" has 74740 wake up counts but it's 0.0%. In "other", it's awake time is 96%, as well as no data connection, etc, I have pics so you can see what I'm talking about. According to GSam, the android system is taking the most power and second is the screen. I lowered my max/min cpu and set the phone in power save mode. It goes from 100-30% in 6 hours. I have it on wifi like all the time (poor 3g coverage where I am) and it sits in my pocket. I did the basic requirements ( got rid of apps, fixed refresh intervals, etc) I attached my log.
Deleted
It'd be cool if we knew what Rom/kernel your using.
Sent from my GT-I9300 using xda premium
xblackvalorx said:
It'd be cool if we knew what Rom/kernel your using.
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Of course. I'm on Jellybomb version 11 and im using the stock LJ 7 kernel.
Could I have some help please

How Can You Disable Screen Dimming?

Is there a way to keep the screen from dimming after a period of time? I set it to never turn the screen off while charging, but it still dims while the music app is up when it's charging in the car which is annoying. I can't find the setting anywhere in LG's settings or in tweaksbox.
I tried Lux as others have suggested but it still dims in my truck. Very annoying.
This app has helped for me: https://play.google.com/store/apps/details?id=com.synetics.stay.alive
My screen doesn't dim ... did you turn off Auto brightness?
What would cause it to dim by itself? I only run at 61% brightness so maybe I haven't experienced this yet
My auto brightness is off and it still dims. Lux auto is on or off and it still dims.
Kujila said:
My screen doesn't dim ... did you turn off Auto brightness?
What would cause it to dim by itself? I only run at 61% brightness so maybe I haven't experienced this yet
Click to expand...
Click to collapse
Yup, I always have auto brightness off. It just dims after a minute or so of no input - which happens while I'm driving. I always keep it at 100% unless I'm in the dark which may be why you haven't noticed it - the screen may dim to around 60% anyways. I find it weird that you can't adjust how long it waits to dim, or turn that feature off. I'm guessing this is part of LG trying to help with battery life.
DroidApprentice said:
This app has helped for me: https://play.google.com/store/apps/details?id=com.synetics.stay.alive
Click to expand...
Click to collapse
Thanks, I'll check that out when I get a chance.
Hmm weird. I wonder if this is the overheating issue I read about
Kujila said:
Hmm weird. I wonder if this is the overheating issue I read about
Click to expand...
Click to collapse
I've only ran into that a couple times and the screen dimmed to 90-95% and I had to manually turn it back up. This is different where it goes bright again as soon as I touch the screen and the dimming is much darker than 90% - more around the 50% ballpark.
Wow, yeah that sounds extreme...
I know it's a pain, but have you considered doing a hard reset to see if it is indeed setting/software related?
If the OP was referring to the "Screen brightness lowered due to high temperature" message.
Go into the hidden menu by typing 3845#*855# (replace 855 with your devices model number, mine is a D855).
Then scroll down to Thermal Daemon Mitigation OFF and make sure it is enabled (on).
Reboot the device and you can now force maximum brightness all the time.
Kujila said:
Wow, yeah that sounds extreme...
I know it's a pain, but have you considered doing a hard reset to see if it is indeed setting/software related?
Click to expand...
Click to collapse
I actually had to get a second phone a week ago because I cracked my screen (a few hours before my protector came in the mail). At least it was early enough that I got a brand new phone through insurance instead of refurbished, but both phones do it. Could be a Sprint vs Verizon difference - Verizon likes to go crazy with phone mods lol. Though I don't normally run into it with normal usage - only when the screen is set to stay on while charging through the developer option and I'm driving with music.
Mine does that. Sprint phone, happens after a minute of no input, including when the screen is set to stay always on. However, I notice this doesn't happen when running Maps.
I've already gone through two phones, same on both.
WillJeepForFood said:
Mine does that. Sprint phone, happens after a minute of no input, including when the screen is set to stay always on. However, I notice this doesn't happen when running Maps.
I've already gone through two phones, same on both.
Click to expand...
Click to collapse
There are certain apps - and Maps is definitely one - which will not allow the screen to dim or the device to sleep. (YouTube is another for example, also iHeartRadio, etc.) Really the best thing to do is mod using something like Tasker or Stay Alive! as I mentioned in an earlier post for specific apps. I use mine for the Music app since typically I've got mine on the car charger and dash mount and it makes no sense to go through a whole screen unlocking routine to fully operate music after a while.

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