yashsingh1/xdaforums huggingface dataset:
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] omniomi:
Has anyone found anything at all besides regular returns to Samsung to correct this issue? I have a Tab Pro 12.2 that does exactly the same thing and it's running CM11 so my warranty is void.. no returns for me. It's pretty much the exact same deal as everything listed here... doesn't start until <50% battery, doesn't happen when plugged in, disabling hardware overlays doesn't do diddly, lowering brightness helps a bit but not always. The only additional details I have are that it doesn't seem to happen when watching movies, even streaming, it happens mostly while scrolling especially in Chrome and Newsstand but even worse in Firefox (lots of white might be related but my testing isn't detailed enough.)

Happened on stock and has happened since I installed CM11 as well so neither ROM is free of the issue.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] muzzy996:
Preventing it no . . . temporarily resolving it . . yes, with custom recovery. Boot into custom recovery (TWRP) and clear dalvic cache. Reboot, let the OS rebuild dalvic and all should be well for a while after that. What triggers it I have no idea. I've repeated this several times so I know it works on my SM-P900. Also, for me the flicker doesn't necessarily appear only when battery is below 50%. I see the flicker issue sometimes once a week sometimes after a couple of weeks.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] Criminal23:
I see it like you.

Flickering is only with power lower than 50% and when Note need much GPU.

For me Flickering starts with Custom Recovery (I think so)

Could the GPU timings made the problem?

sent from my amazing SGS5
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] peterjo78:
Flickering finally fixed. hardware wise

Flickering issue solved!

Try this at your own RISK!!

I recently solved flickering issue to my note 12.2 P900 wifi version.

I'd had to open the back cover.

The battery pushes on the cable for both the screen and wifi cable.

I raised the motherboard up with a thin piece of plastic sheet and

problem solved!

I had no warranty so I went ahead to do it.

The flickering solved. no flicking with Full brightness even when battery was 10%.

I did this after I replaced my Lcd cable from ebay seller.. so its the battery casing

pushing the Lcd cable connection to the motherboard.

Hope it helps someone as I have found no solution to this anywhere.

developer option, resetting ... none helped.

reply if anyone has a question
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] baddison:
Would love to see how this is done. Are you experiencing better battery life too?
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] peterjo78:
battery life is just the same ...around 6-7 screen on time...

but it was driving me nuts the flickering and so happy now..

maybe I can upload few pics of how I did it in day or two...

it's relatively easy job i would say. only becarefull to not to lift the

motherboard too high out of the place to avoid damaging

i have had zero flickering since the repair, very happy with it.

mine always flickered unless i lowered brighness to like 20%... it's

good now
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] muzzy996:
Glad you fixed yours, sounds like some of us have a different issue though. Some of us who observe flickering don't necessarily have a hardware issue. In my case the flickering only occurs after a long period of use (sometimes days, sometimes a couple of weeks) at which point it only manifests itself in certain instances like video playback.

I just had it happen again this morning at full battery power. Tablet worked perfectly fine, and playing Clash of Clans game was perfectly normal but when I fired up Hulu to watch a TV show the flickering started. I exited out of Hulu and tried YouTube and it was there during video playback too . . jumped back into COC and no flickering. I observed no flickering in Chrome, Tapatalk or on the home screen. As in all past experiences with this issue for ME all that was required was a reboot into custom recovery (TWRP) and wipe dalvic cache . . I then rebooted, let Android re-optimize applications on its own and bam, no more flickering in videos. I don't expect to see the flickering again for several days.

I highly doubt a simple lose connection is fixable with a dalvic cache wipe so I'm not going to bother cracking my case open.

I'm going to guess that for some the flickering is happening regardless of what the active application is or activity going on . . for example, it would happen even just sitting at the home or lock screen. This would be indicative of a hardware issue such as what you're describing.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] peterjo78:
maybe one thing is whenever i had flickering issue I would press down on middle of the tablet on the back plate. below camera and midline... and whenever I applied pressure on the middle of the tablet the flickering would stop...

internally the ribbon cable is located right around the midline... if the flickering stops if you apply little force.. maybe it can be diagnosed as connection issue... then again your case seem quite mild... mind was pretty bad

---------- Post added at 11:42 PM ---------- Previous post was at 11:37 PM ----------

one thing is try putting pressure on the backplate of the tablet on the middle. (Without opening backplate)

if the flickering stops then it can be diagnosed as cable issue i think.

because on mine the bulkiness of the battery was pressing my cable upward.

because that`s how i concluded that its a cable issue.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] peterjo78:
i created this video of best to my knowledge...

https://www.youtube.com/watch?v=CvxbVft69Kg&feature=youtube_gdata_player
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] baddison:
Thanks so much. Gonna give this a try. I noticed the same behavior you mentioned with the screen flickering....if I press the area at the top behind the camera area, the flickering stops. Also, during flickering, this same area gets extrememly hot. Will report back, hope this resolves for me, too!!
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] peterjo78:
Thank you for keeping me posted!
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] pete101:
great video. Is that 2 batteries either side or just one on the right side?

Do you think all note pro 12.2 have the flickering issue?

Mine came up when the auto brightness was adjusting like there's a line running across the screen my Samsung s3 did similar and was put down to a slightly loose connection
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] msricks:
Applied your fix. Great help! I'll report back to see if it'll permanently fix the issue.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] pete101:
On a side note does anyone have or know why the

Note pro keeps rebooting randomly?

Is this hardware or software issue?

I did factory reset which seemed to fix it then downloaded some apps still seemed to work no rebooting

Then I transferred 6th of data via wife direct then it started to reboot when I took the sd card out..why?..

What has it to do with how much data is transferred seems like when ram gets full it reboots

Next is to flash it with odin then flash it with previous 2 firmwares..can it be a hardware issue?
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] peterjo78:
Thanksp you for the reply!

Hi the battery is one piece.

https://www.youtube.com/watch?v=VeSG0hHpAG8&feature=youtube_gdata_player

i used this video to findout about the battery

If you have warranty samsung might void the warrany for opening up the back. Idk.

My issue was pretty bad flickering.

I dont think all note 12.2 has the problem.

i think the battery housing that houses the 2 big battery cells are raised up too much.

i think it maybe the battery casing issue that creates undue pressure on ribbon cable connector.

Sorry as im not sure about other then badly flickering screen.

I just gathered bits of info from various posts on note 10.1, 12.2 etc.

Im not too keen with software side of things... just a diy-er. I love how xda community has so much support. Dating back to my s2, s3, note 2
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] pete101:
could i ask, when you take the back off i know the back side is faux leather but is the back side of that plastic as in non pourous?

reason i ask is my note pro heats up too much and it's widely known lithium ion hates high temperatures so i have strapped an icepack to the back of my note pro wrapped in 2 plastic bags to avoid the water condensation seaping through into the back of the case.. the faux leather feels porous as in water can be absorbed through but im not sure about the back side of the cover behind the faux leather.. if it's plastic non porous then the water won't go through even if there was any.. can you tell me if that's what it is like please? i can't tell from the video it's not clear.

last thing i want is water vapour seeping through the faux leather and going into the parts. it'll damage the tablet otherwise.

---------- Post added at 05:07 PM ---------- Previous post was at 04:52 PM ----------

could i ask, when you take the back off i know the back side is faux leather but is the back side of that plastic as in non pourous?

reason i ask is my note pro heats up too much and it's widely known lithium ion hates high temperatures so i have strapped an icepack to the back of my note pro wrapped in 2 plastic bags to avoid the water condensation seaping through into the back of the case.. the faux leather feels porous as in water can be absorbed through but im not sure about the back side of the cover behind the faux leather.. if it's plastic non porous then the water won't go through even if there was any.. can you tell me if that's what it is like please? i can't tell from the video it's not clear.

last thing i want is water vapour seeping through the faux leather and going into the parts. it'll damage the tablet otherwise.

---------- Post added at 05:24 PM ---------- Previous post was at 05:07 PM ----------

from what i can see from the video when you take the back cover off there is plastic on the inside but also black square parts which i can't tell of what material it's made of also a gold chip of some sort.. does the back cover contain any important contact points you can see that help make the tablet run or can it easily be started without the cover on?

reason i ask is i noticed some gold square chip and black sections of the back cover. could you do me a favor and take a photo of what the back cover looks like on the inside please? i'm trying to see if it will absorb through any water vapor if i attach the ice pack to the back (the ice pack is covered by 3 plastic bags but still some water vapor might seep through)
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] msricks:
yes

I have performed this and can confirm the back comes off easily and the tablet still works with it removed. The black just seems to be extra protection for the mother board.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] regenboog250:
second time to retailer

After replacing of full digitizer the flickering was still there. Today I returnerd my Galaxy Note 12.2 for the second time for repair. Nothing changed from first repair.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] regenboog250:
came back after second repair, now the replaced battery, did not tested yet.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] pete101:
So I returned my note pro and got a new one and now it has this screen flicker issue like this thread has suggested. I disabled gpu and hardware overlay and whatever it is called and video stops flickering can I ask what is actually causing it and why does disabling hardware overlay and forcing gpu rendering work?

Does anyone know the reasoning behind it? I know some like pete as hardware issue where thr cable at the back gets pressed on 'by the battery but does that apply to everyone?

Mine was manuactured I cannot tell but it still came with the original kitkat 4.4.2 and I heard updating the firmware stopped this issue for some but not others

Is it actually firmware or hardware or both?

---------- Post added at 02:16 PM ---------- Previous post was at 02:04 PM ----------

Is there 2 batteries side by side when you open the note pro?

I cant tell what is the square thing on the left side is it another battery?
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] pete101:
Does anyone know why disabling hardware overlay works?

I updated to the latest kitkat version of 4.4.2 but a new bug has come in where when i unlock thr screen it still is asleep and none of the apps icons work i just need to close screen again but it is annoying bug happened on the other 2 tablets i returned also on this latest version of firmware
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] muzzy996:
No it doesnt apply to everyone, my tablet just showed the issue again this past weekend and I tried pressing the back of the tablet to no avail. Disabling hardware overlay worked as expected. Eventually I did my typical fix of booting into custom recovery and clearing dalvic cache.

My theory is something eventually gets corrupted that is related to video playback via display drivers or something. This is for us xynos folks of course, who have flickering only during video playback (not flickering all of the time).
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] b1sprinkler:
I haven't sent my tablet in yet although better do it quick before warranty is out. My flickering gotnto the point of even when olugged in as soon as iy would boot uo in a few seconds flicker then reboot. And iy would keep cycling that way. NOW THE ONLY REASON I HAVENT I BECAUSE I HAVENT HAD ANY FLICKERING SINCE ACCIDENTALLY DROPPI NG MY TABLET. It was in the case so there wasn't any physical damage but since then no flickering and that happened approximately 2 weeks ago.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] muzzy996:
That sounds like the cable issue that peterjo78 described earlier in this thread.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] Nikon5400:
pro 12.2

I have this issue when battery temperature >105F. One way to bring the battery temperature up quickly is to run ookla speedtest a few times.

I am not sure at the moment if it only happens when battery level is low, will test later and report back.

Update - I can't recreate this issue with battery > 80%. Interestingly, speedtest wouldn't increase the battery temperature as quickly as it does when battery level around or below 20%. I ended up heating up my tablet by placing it on a heat vent (in addition to running speedtests), but even at 135F screen didn't flicker. So, I guess battery temperature may not be the culprit here, but battery temperature + low battery may be. I hope there's a firmware fix for this, but since these issues were first reported over a year ago I doubt there will be. Also, the tweaks in Developer's section don't work.

Before sending this tablet to samsung, I'd like to make sure Samsung really fixes this issue. Can anyone who had their unit serviced and thinks it works now do the test I did? With battery level under 20% please bring your battery temperature above 105F by running some app(I used speedtest multiple times). If it still works at 105F, could you please run speedtest a few more times to bring it to 120 or so. It's important to not let it idle between speedtests as it cools down quickly.

Play store has a few free battery apps that show battery temperature. The ones I use - Battery Doctor and Battery HD. I like Battery HD better because it shows the temperature right in the notification bar when you pull it down.

Thanks
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] brad7000:
My tablet now regularly hangs with 70+% of a charge left. Really annoying.

I am convinced that something is making the system think it is out of battery power. I have gotten a completely empty battery when rebooting after a hang before, though that switches to the proper percent fairly soon afterward. This tells me something is wrong there.

The screen flickering is almost certainly the system's way of saying it is low on power, even if that is not true. It just thinks it is low on power.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] Nikon5400:
pro 12.2

I'll send it to samsung once I get the confirmation from someone on this thread who had this issue fixed by Samsung.

can anyone who has theirs serviced chime in? please test it like I did (described in my previous post)

also please specify what part was fixed or replaced

Thanks
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] doggmeister:
same issue here

i tried opening the case, removing the video cable and re- inserting it with quite a bit of force back into its housing and this seems to have dramatically reduced the amount of flicker i now receive (i get very few instances of flicker irrespective of temperature, pressing on back cover etc) , i suspect a few more tries of this may resolve the issue altogether but would like to offer this and see how others get on?
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] omniomi:
Reporting in with an SM-T900 (Tab Pro) - I removed the back, reseated the display ribbon cable, and added strain relief as depicted earlier in this thread and so far no more blinking...
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] msricks:
So, I've tried all the hardware and software fixes in the thread for the flicker. None have worked. My tablet already went to warranty repair about six months ago. Still, the flicker was there.

So, it went back for a second warranty repair. This time the charging port or something was replaced. The picture shows the repairs made (sorry if it turns out sideways). I'll report back if this fixes the flicker.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] gshimabuko:
I tested it and my problem also happens for temperatures of over 105°F. The problem increases dramatically for temperatures over 120°F. I also noticed that the tablet reaches these temperatures very easily when brightness is set to higher levels.

Now, I've seen this happening before in 2 cases. One is bad connection. The second one was because power source couldn't give as much current as lcd requires.

Since the fix reported here was simply a way of fixing a connection, I'd say that the problem really is the first. As an engineer, I'd say that this is related to the dilation of the battery at higher temperatures. There's a plethora of reasons that explains why this doesn't happen with a full battery, (eelectrochemistry ). I will send my tablet to samsung and see what they can do for us. I'm also going to send them a full description of our observations.

Thanks for the insight. I'll keep you posted.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] omniomi:
Annnnd it's back to doing it so nevermind.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] msricks:
My second factory warranty repair did no good either. I'm done with this thing and throwing it on eBay. Thanks for the help everyone. Nice to see when xda forums are peaceful and helpful.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] c2o2jr:
Thank you to to everyone

Peter, your YouTube video was very helpful - my flickering issue, which I have fought for the past year, completely resolved. Two trips to Samsung RNA repair center, multiple factory resets, and various battery management applications did not fix this issue, but your solution did. I used a 1 mm thick x 8 x 8 mm square plastic tab, placed under the motherboard to the right of the cable, per your video, with no residual issues. I even used the Note Pro to a FULL BATTERY DISCHARGE, in contrast to the reset loops that would invariably occur when battery level reached 30-50%. So, thank you again - would recommend this fix to everyone.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] doggmeister:
Link to second video please?
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] sirbanks:
Working Now!

Peterjo78, you are the man! I have been struggling with this since I got the 12.2, however here recently it has gotten much worse, almost making the tablet unbearable to use. I reluctantly replaced the ROM with CyanogenMod, thinking it was a problem with the Samsung ROM. The problem immediately got worse (not saying anything was wrong with the CyanogenMod ROM, I love it!). I tried your fix of placing a plastic spacer under the motherboard near the display cable connector and for the first time in months it has worked for a couple days with no flicker! Hoping it holds, but wanted to pass on thanks for the info!
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] doggmeister:
video link please

can someone link to the video please?
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] muzzy996:
Page 3 of this thread, post 53.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] doggmeister:
thanks! sorry i thought there was a second video but i must have miss read as ive already see this video
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] muzzy996:
No worries. I think someone requested a remake in landscape orientation but it was never redone. The pertinent information is there though I guess.
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] goomcz:
screen flickering

the soulution

is remove back cover and pull up the motherboard and under motherboard take a plastick or duck tape

no flickering
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] doggmeister:
thanks I tried this and it made no difference, as soon as battery hits below 50% the flicker begins and just gets worse as battery drains
[Galaxy Note Pro 12.2 Q&A, Help & Troubleshooting] omniomi:
This issue really frustrates the troubleshooter in me... So many reports of basically the same symptoms, multiple fixes all with those who say they work and those who say they don't, an issue resolved for some with hardware fixes and for others by software fixes...

I've tried:

- Upgrading and downgrading the Samsung firmware.

- Using 3rd party Cyanogenmod firmware CM11 and CM12.

- Disabling hardware overlays.

- Auto brightness off, auto brightness on, brightness set to various levels until the screen was so dark it was almost unusable.

- Power saving on, power saving off, performance enhancement on, performance enhancement off.

- Rebooting as soon as it starts happening.

- Clearing the dalvik cache.

- Factory resetting and installing no apps.

- Different browsers since Chrome seems to be the worst offender but the default browser and firefox were just as bad if not worse.

- Taking the back off and reseating the display cable / adding stress relief.

Of all the things on the list clearing the dalvik cache has the best results but they only last until the next time I charge the tablet and let it discharge down... It leads me to believe the issue is software related but if that's the case it makes very little sense that the issue persists across multiple stock ROMs and multiple 3rd party ROM versions... How would a software issue present in stock 4.4.4 also be present in CM12 and not affect all owners of this tablet? Just by chance one of my flashes should have produced a state where the issue doesn't exist but it has happened in every ROM I've tried... So that leads me to believe it's hardware but why then does resetting the dalvik cache help? Also, what hardware component could it be? The display itself is fine as it works perfectly until the battery level hits a certain percentage... it can't be heat because I can not use the tablet for a few days and it will start flickering the second I start using it if the battery is low enough...

This is one of the most frustrating issues I've ever had with a piece of hardware and the fact I have tripped Knox (and opened it) means I can't even send it in. I'm stuck with it.