Screen flicker

[Daniel0418]

Yeah it only happens in love brightness, auto brightness bares no affect. And yeah it looks like it only happens for me when WiFi is on. When I turn WiFi off the problem ceased to exist. I don't think its that easy of a software fix. The simple solution would to be lower the power draw by the WiFi radio, but its going to reduce signal quality and some people are already complaining about signal quality. Unless there is a way to change from parts connected to the SOC the WiFi is allowed to draw from. Its similar to when someone turns on a vacuum and your lights in the room flicker.

 

[jmartellotta]

Yep that is definitely it. I noticed the same issue. Turn WiFi off and it goes away. Its really not that bad and I'm guessing a software patch will be out to solve then issue.

Sent from my Nexus 7 using Tapatalk 2

 

[silenzioklze]

my last post here .

@Blayze04 and all that say POWER drop
"The simple solution would to be lower the power draw by the WiFi radio.."
"Its similar to when someone turns on a vacuum and your lights in the room flicker"

what u see is a "flash" = opposite of power drop . Look again

 

[kenyee]

what u see is a "flash" = opposite of power drop . Look again

I looked at this again...I think it's both...droop, then surge. Almost like the power circuit to the backlight isn't providing stable voltage when the wifi chip kicks in...

 

[lostmarine]

I read on another forum if you enable force GPU rendering under developer options this fixes the problem... dunno if it works but it is worth a try.

Sent from my Nexus 7 using Android Central Forums

 

[jmartellotta]

I read on another forum if you enable force GPU rendering under developer options this fixes the problem... dunno if it works but it is worth a try.

Sent from my Nexus 7 using Android Central Forums

I just did this, so let's see if it fixes it.

Sent from my Nexus 7 using Tapatalk 2

 

[lostmarine]

I just did this, so let's see if it fixes it.

Sent from my Nexus 7 using Tapatalk 2

Any luck?

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[Daniel0418]

No force GPU doesn't fix this, I enabled force GPU the day got I my tablet and has been on she, I still get the flicker.

 

[pete_lockwood]

I called ASUS this am, got someone on the line very quickly but that's where the good part of the story ends.

He claimed this wasn't something they were aware of a lot of people an issue with, said try a reset and I can call back after resetting to RMA it if necessary. Their RMA scheme is you send it back and wait for them to look at it and then either send me the same unit back, repair or replace it. Google's RMA approach is at least to send a replacement first so you're not without a unit.

Kinda surprised ASUS haven't heard more about this but I suppose it's also easily possible I was lied to and they're running around trying to work out how to resolve it.

 

[kenyee]

Asus replied to my post on their facebook page and said exchange it for another one so they're burying their heads in the sand about this wifi flicker issue

 

[lostmarine]

I have WiFi on all the time and have my screen brightness turned all the way down and haven't had a screen flicker once. Perhaps you have a faulty device or I am blind.

I also put it on auto detect for a couple hours and haven't had a screen flicker.

You should try and catch it on video.

Update: I looked it up on YouTube...

http://www.youtube.com/watch?v=G1Z6EgvTC5U&feature=youtube_gdata_player

That is crazy has to be a bad device mine doesn't do that.
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[igjoe]

I've been watching as many forums as I can about this issue because I returned my 16gb version and won't buy a new one until I know I won't get the flickering.

Looks like someone got an answer from Google over at xda regarding the flicker issue. If he's being honest, it sounds like it's a hardware issue that is being fixed with newer builds of the tablet.

Here is a link to the person who got an answer: xda-developers - View Single Post - Nexus 7 BAD screen flicker!

Also, here is an interesting article that's speculating the shipment delays are due to hardware issues rather than just demand: Is demand really why Google stopped selling 16GB Nexus 7?

 

[dean411]

I see the same problem, there is some power regulation problem such that when the WIFI is trying to shout out at full power, it sucks power from the backlight, causing a noticable "flicker" especially if it's a white screen of page not yet rendered.

I just got my nexus 7 yesterday and noticed the same screen flicker. Installed the new update bit to an avail. I did notice that its most noticeable when my WiFi signal is low and I am I a dark room. Although I did try to disable the auto brightness, however that did not help. I got mine from GameStop. Next test is yo yes it in a dark room, with low WiFi signal (further from my router) and have the charger plugged in. Maybe there is something going on with the power drain when WiFi has to work harder.

 

[Nascar Dog]

I have WiFi on all the time and have my screen brightness turned all the way down and haven't had a screen flicker once. Perhaps you have a faulty device or I am blind.

I also put it on auto detect for a couple hours and haven't had a screen flicker.

If you have a strong wifi signal, you will not see the flicker problem.

 

[betsuni]

Interesting, so Google will only send you a replacement if you bought it directly from them? Has anybody tried to contact ASUS and see if they will also send a replacement unit?

I'll have to go look at my box and find the build number for mine to help figure out a pattern in the build batches for your XDA thread Nascar Dog.

 

[pete_lockwood]

I got mine from Google but called ASUS and they were willing to give me an RMA number. Difference is they want the unit back for testing before they ship out a replacement.

edit: I only called ASUS in the hope they'd have a clue. They didn't. Google will be getting mine back.

 

[kenyee]

I have WiFi on all the time and have my screen brightness turned all the way down and haven't had a screen flicker once. Perhaps you have a faulty device or I am blind.

Ditto what Nascar said. If you have full bars on your wifi indicator, you probably won't see the flicker though you might once in a while.
I've been thinking they could have missed it because they probably tested in a lab w/ lots of signal strength...

And I posted on Asus' facebook page...they just said get another one. Gotta wonder who's footing the bill for all these exchanges, but that also means there are going to a lot of refurbs after a while if people want it cheaper...

 

[pete_lockwood]

Gotta figure ASUS built the thing, it's their problem to replace/repair 'em.

 

[dcosta43]

I'm on my second nexus 7, my first one had bad ghosting but no flickering, this one has flickering and its definitely has to do with WiFi, so what you guys think? Return this one too ?

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[kenyee]

I'm on my second nexus 7, my first one had bad ghosting but no flickering, this one has flickering and its definitely has to do with WiFi, so what you guys think? Return this one too ?

If you don't have full bars all the time (not close enough to your wifi router), I'd suggest returning it and waiting another month before buying another one.
Asus has to be aware of this issue by now...someone in the XDA thread said the newer ones have that fix.
I just got a new one from Staples (exchanged for one w/ light bleed on the backlight) and it still has the flicker problem...very noticable w/ weak wifi signal...barely noticable on strong wifi. At least they seem to have fixed the left edge of the screen popping up in this batch