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Issue 39910: Nexus 7 laggy after Android 4.2 update
116 people starred this issue and may be notified of changes. Back to list
Status:  WrongForum
Owner:  ----
Closed:  Jun 2013

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Reported by, Nov 17, 2012
I know there are quite a few tickets on the same issue. But i really want to bring this issue to Google's attention, hence the duplicate post. This should be dealt with high priority and a fix shoud be given out asap.
Facing a lot of problems with MT Nexus 7 after updating to 4.2, even with no additional user account enabled. Opening Google search is always slow. Transitions are laggy. Typing is often laggy. Applications do not react for a few seconds intermittently. Really really frustrating to use the tablet now.

I performed a reset, but still no improvement.

I have a 16 GB Nexus 7 purchased Aug 15th 2012.
Nov 18, 2012
Very disappointed at the update, basically ruined my nexus 7, wouldn't recommend 4.2 update for ANYONE. Please fix this as soon as possible.
Nov 18, 2012
The update is great in many way: improved font hinting, improved screen colors (fixed the tegra 3 washing out), smoother browser and general feeling. But now my NEXUS 7 16gb is laggy. I've done the update two days ago so the background work is surely ended. I've tested with androbench and the random write I/O is back to 63. Really low!

Nov 18, 2012
Nov 18, 2012
Yes. Android 4.1.2 (JZO54K) had more stability.
Nov 18, 2012
I've definitely experienced this, I even have major lag issues when just tapping the screen. It is ridiculous I often have to hold down my finger just to get it to detect a tap. I this lag is effectively ruining what was once my favorite gadget. Please fix this. I can't stand the lag. 

Nov 18, 2012
I'm experiencing the same problems. I'm going to do a full wide and if that doesn't solve it I guess I'll be rooting later today and install CM10.
Nov 18, 2012
Yeah, my nexus 7 has been lagging like mad as well. Really ruining the experience. Never lagged at all before 4.2. I regret updated a lot. I don't know why its so laggy. Its almost as bad as some earlier versions of android.I hope there's a fix soon, as its driving me crazy.
Nov 18, 2012
I have the same lag issue on Nexus 7 / 32. Google Now and search lags so bad you can hardly type. Trying to use a bluetooth speaker while connected to WiFi makes it worse. Google music,Youtube,Netflix,skips and stutters. Very frustrated because my Android powered Nexus was my go to tool for pretty much everything.
Nov 18, 2012
I did a full wipe a few hours ago and so far the lag is gone, so I am
hopeful that the problem is fixed. The odd thing is that my wife updated a
few days before I did on her Nexus 7 16g and has had zero lag.
Nov 18, 2012
Really 4.2 update brang laggy, i've done reboot (pressing Power+SoundDown during 10 sec), but it helped a little
Nov 18, 2012
Yes, 4.2 has made me go from loving to use the Nexus 7 in 4.1 to getting frustrated using it with 4.2. It lags a lot and feels like a $50 tablet sometimes.

Nov 18, 2012
After getting the OTA 4.2 update, my nexus 7 has been lagging during  transitions, sometimes it even freezes for a couple of minutes. My nexus spontaneously reboots at random time intervals. The keyboard operation perfectly smooth until I press the home button - it wouldnt go away own it own. Resets have been useless at resolving issues. 
Nov 18, 2012
Mine has become extremely laggy too. Google search is unusable, Checking what storage has been used takes forever, just sits at "calculating"
Nov 18, 2012
Have the same lag issues with most apps, search etc.  OTA update on a Nexus 7 w/ 32GB.  Have turned of swipe on the keyboard based on feedback I saw another post and see to help a bit but still much slower than 4.1.2
Nov 18, 2012
Clear your caches.

Reboot your tablet into the bootloader by turning it off, and then pushing the volume down + power buttons at the same time. Then, use your volume buttons to select the recovery. If you’re on a stock recovery, wait until you see the Android with the red exclamation point, and press volume up + power at the same time. Select the option to clear your tablet’s cache, and then wait for it to reboot.

If you’re on a custom recovery, simply navigate to the appropriate options, and clear all your caches that way.
Nov 19, 2012
#17 Andreas.Ronacher
dito on my nexus 7 since update. Very laggy after waking up from idle.
Nov 19, 2012
Mine also became extremely laggy, too. I almost hate my Nexus7....
But after cache clear, it becomes much better!
Nov 19, 2012
Same here, as soon as I started using 4.2 I noticed frequent lags when starting applications, switching between them, going back to the home screen, opening notifications... My configuration hasn't changed after the upgrade, so I can only blame 4.2
Nov 20, 2012
Been having lag and soft reboots when screen has been on for a long time. Also experiencing wifi connectivity issues. Here's a link to last_kmsg:
Nov 20, 2012
Clearing cache as suggested above seems to have worked for me.
Nov 20, 2012
Clearing cache has also resolved the issue for me. Mine was very laggy, and have had no noticeable lag since clearing the cache.
Nov 20, 2012
I'm also having issues with the android 4.2 update. I tried clearing the cache (thanks for the tip!) but still, surfing the net is sloooooooow and watching anything on YouTube is a virtual nightmare. I want my google nexus back!  Please do something about it ASAP.

I read elsewhere that resetting the machine to factory settings also helps, has anybody experimented with that? what does that mean in terms of stored files (e.g., pdf, photos, etc.)?
Nov 20, 2012
Same Problem
Nov 20, 2012
Same problem here too. There are also many UI regressions such as the new date layout next to the clock and stupidly smaller icons on the launcher's dock.
Nov 20, 2012
Took me over a minute to type in "android 4.2 lag" into the Google search bar to get to this page! 
Screens don't slide properly. I've only had my nexus 7 2 weeks it was so smooth before this update. You have to fix this as high priority,  the tablet is barely usable. 

Nov 20, 2012
I have a galaxy Nexus with me and facing the same issue. The phone became laggy with the 4.2 update. I bought the phone from Google Play in US.
Nov 20, 2012
#28 adam.spriggs
If you can get past the flame war, there's decent workaround in this XDA thread:

TL;DR - Disable Google Currents background updates
Nov 20, 2012
I have the Nexus 7 16gb and experienced the same horrible lags. I was close to do a full wipe, but then I noticed that the lags mostly came when accessing the storage memory. E.g. looking for memory usage of apps in the settings menu (see comment 14). I then realized that my storage memory was nearly full. Only about 1gb left. I just deleted some movies (about 3gb) and now everything works like a charm again! Probably that's the same effect when clearing the cache. Just free up some storage memory and your sweetheart will be back:)

Nov 20, 2012
For people experiencing lag after trying other fixes...
I did everything, removed cache, then reset and nothing, still long lag, until I looked into accessibility...

as it turns out, if you have screen magnification turned on (update automatically turns it on), it will take over 300ms in order to complete your tap.

Go to calculator and toggle the feature on, test it, toggle it off, you will see this will return it to it's former glory.
Nov 21, 2012
So frustrated. 4.1.2 was a thing of beauty. Now it's so slow I'm about to go back to my first gen Galaxy tab 10.1

Nov 21, 2012
People who haven't tried yet the workaround proposed in comment #16 should give it a try.

I did that yesterday and the sluggishness is completely gone for me, it's now as fast as it was before the update to 4.2. Not sure if it's a long-term solution, but right now I'm happy with it.
Nov 21, 2012
I did try #16, and it worked for a short time. But now I'm back to a nexus7 that is lagging and stopping and hard to use. #veryannoyed
Nov 21, 2012
Clearing the cache worked for me I also disabled Google currents as I never use it. 
Nov 21, 2012
Noticing marked improvements after implementing #16 and turning off Google currents sync, unfortunately not tested independently;(
Nov 22, 2012
I have been having this lag problem as well since the new 4.2 update, I haven't tried clearing the cache, but I will very soon. What I have done and which had made a world of difference is turning off screen rotation.I did it just for the heck of it, but noticed right away that transitions between home screens improved. Sounds crazy, but if others can comment and let me know if it helps them as well so I know if it's a placebo effect or if its real. Thanks a lot
Nov 25, 2012
Hi to all, after a couple days with the update 4.2 on my nexus 7 - 8gb...trying to solve all the lagging issues that all report on this forum I decide to re-image my tablet with the previous version 4.1.2.

My handwriting apps was really difficult to type, SwiftKey was really slow to open and games suddenly convert in a frame by frame experience when some app was updating in the background. 

I try everything that have been posted on this forum.... Clean cache, disable gesture type, disable other accounts, remove full data and at the end till reset my table to factory default... Still the same after a couple hours. 

Now my table works again like a charm. I prefer to wait for a 4.2.1 release when this problems had been solved and some customers will confirm this. 

I think the 4.2 version is still under improvements, so I know that Google will release and update soon with everything solved. 

From now, the only annoying part is receiving the message for the 4.2 update.. I just skip. 

Hope this helps, I use my tablet daily at job side and for entertainment... The tablet is amazing, and fast, stable.. But the update 4.2 looks like my old Kindle fire with ICS.

Nov 25, 2012
I'm just throwing my hat in the ring to say I'm having laggyness although not to the same degree that others seem to be having. I too have tried the xda solution but nothing happened. I also remembered another lagginess issue that required a max out-flushing of memory and that didn't work either. 
Nov 25, 2012
Disabling background sync in Google currents has seemed to remove a lot of lag after reboot.  I read about the fix online and so far seems to have helped a lot.
Nov 26, 2012
#41 4braham
On my Galaxy Nexus running Android 4.2 Currents used 14MB of data with out me ever opening or using the app. After disabling sync the phone appeared to improve in general performance.
Nov 26, 2012
Same problem as others, Nexus 7, 8gb. My wife also has the same 8gb Nexus 7, same lags, but different apps.
Nov 27, 2012
My Nexus 7 is fine with 4.2 (maybe a bit slower than 4.1, but not at a catastrophic level), BUT my Galaxy Nexus has become next to unusable @ 4.2. Needless to say that I tried everything, including the "wipe cache partition" thingy.

My most common use case: Open Evernote, select the "+" (add a note) icon, and then enter text. This has become entirely impossible on the Galaxy Nexus: Opening the application takes three, four, sometimes more seconds. Then the device is unresponsive - neither the Android buttons (home, process list, back) respond, nor does the Evernote "+" icon. After another three, five, or more seconds, the buttons start reacting - but then it takes another five or more seconds to open up a new empty note. Then I'll have to wait for the keyboard - another three or four seconds.

It's the same for taking pictures (once the camera app ip up and responsive, the opportunity for the picture is long gone), for Google Now, and virtually for everything else.

Even my own slim truth-tables application takes more between five and ten seconds between starting up and showing the UI (only an input field and a few graphical buttons). Ten seconds!

Chrome starts up quicker, but, in the beginning, is extremely laggy, too. So is virtually any other application I was using on a regular basis.

The Android buttons (home, task list, back) sometimes do not respond at all. And so on, and so on.
Nov 28, 2012
I get serious lag. Google now takes a good 5-7 seconds to start, once it is started sometimes searches don't load, other times type inputs are seriously lagged. Occasionally I can type three or four words before the sound and letters appear. 

I don't remember it being such a problem on 4.1. 
Dec 1, 2012
It looks that Google release the update 4.2.1

As far I read on some forums, it looks that now everything is working again. 

I will give a try and check if the OTA update will come with it, but if not I will try it manually and check it. 



Dec 1, 2012
I see no difference in performance with the new update .Same problems. Fixed December?Really?
Dec 1, 2012
4.2.1 seemed to have fixed the issues but it didn't. It was just the effect of a reboot. After a day it's still the similar honeycomb-like experience. This is so frustrating! I felt like throwing the N7 to a wall a few times, but then I reminded myself that I can revert to 4.1 and fix this problem.

4.2 is a disgrace. It by far and away the worst release ever in the history of Android. No other release was such a clear step backwards on so many levels. Even honeycomb was an improvement over existing 2.3 tablets. This is ridiculous.


I can't recommend Android to anybody anymore. And I was a huge fanboy, but my patience has its limits.
Dec 1, 2012
OMG my release isn't two weeks old yet. Why isn't it perfect!!!11 Seriously though,  what Google doesn't do right is communicate with the community, IMHO.
Dec 1, 2012
This release? There have been known issues with bluetooth and WiFi combined which make an android device pretty much useless for years. I love Android but let's be real here. Take your mouth off of the nitrous can.
Dec 1, 2012
The problem is not that it is buggy, it's that it's unusable. I need the tablet because I integrated it in my workflow, and now I spend more time worrying about crashes, freezes and lags than actually doing any work. Look I should be doing work now, but here I am on a bug report page trying to communicate my frustration, hoping it will go away. 

I paid money to get a device that works and was advertised as being fast and smooth. And it used to be. Until 4.2 of course. 

Now, I can put up with bugs when I beta test a community ROM, because they do it for free and some things just don't work all the time. However, Google is selling the devices and is supposed to support them too. They have to give assistance to their customers and make sure we enjoy the experience. In exchange we go around and spread the good news, making converts along the way. WIN-WIN and it has worked wonderfully so far. Until 4.2, that is.

But what happened here is that they release an unusable ROM, something much worse and more unstable than a Cyanogenmod Nightly (way more unstable and buggier), and they don't even apologise for it. Actually the only thing they acknowledged was the December bug, LOL what a joke. They did that only because of all the negative press, even though that was the most minor bug in this release.

The reason this release annoys me so much is because I LOVE the Nexus 7. I literally rubbed it on my face on several occasions, no joke. Now with 4.2 all the magic is gone, it's like it's some $60 tablet from ebay. That's no cool. That hurts me.

And if you tell me to be patient, well I am patient but when Google fails to communicate what they are up to, or even if they acknowledge these problems I get really worried. Do they think 4.2 is a good release? Are they ashamed? Are they planning to fix the issues or are they going to screw it up some more? Uncertainty is not good. 

Dec 3, 2012
Hi I found a fix for power switch lag on galaxy nexus after upgrade to 4.2  is only to reset the phone , fixed it straight away 

Dec 6, 2012
Disabling and re-enabling WiFi has seemed to work for me. Not sure what it is, but after rebooting my Nexus 7, the Android System process(es) and Launcher process were taking 10-20% total CPU each, and the UI was stuttering pretty badly in every application. 

Briefly disabling / re-enabling WiFi (through settings or flight mode) seems to work when it starts to slow down.

After doing this, the System process was down to 5%~ CPU usage, and the launcher around 0% when not being directly used.
Dec 7, 2012
Give this a try if things are still laggy on 4.2.1:

1. Turn off syncing of Google Currents
2. Get AirDroid from here
- Launch AirDroid
- Click on the Tools tab at the top of the screen
- Click Device
- Tap Release Memory
- Tap the back arrow until you are completely out of AirDroid
Start checking things out and see if they are any smoother.
Dec 15, 2012
Having same issue with 4.2.1. I was going to buy my wife one but now will get her an iPad mini.
Dec 16, 2012
As you noted in the initial description there are multiple bug reports, just wanted to reference a few so that they can be cross referenced.

There are already several bug reports available for many of the issues you listed.

It is more effective for the Android team to diagnose if you *star* existing bugs and leave additional and relevant comments there, rather than creating new bugs.

Combination Issues:
 Issue #39737 
Issue #39858

Typing Lag Issues:
Issue #38767
 Issue #35663 
 Issue #22432  

Issue #41503
Issue #40982
 Issue #40921  
Dec 31, 2012
Fix the lag G-men. 
Jan 16, 2013
i experienced lag on chrome after update to latest version jelly beans
by my nexus7
Jan 16, 2013
i think n7 &google will fix it soon as they work together. asus techical reported as a known issue.

Feb 2, 2013
Tips with google currents :

Other idea : lag is due to the asus memory chip that make nexus 7 laggy when 80℅ full... Android 4.2 itself is not the origin of the lag :-) 
Feb 2, 2013
Nexus 7 Poor Write Speeds After Using Almost All Storage Capacity :
Feb 2, 2013
My 32GB space is only 50% full. I deactivated Google Currents completely.
I don't experience any heavy UI lags. Only the audio has dropouts, especially when multitasking while music is playing in the background (happens with any music player app).
I only experienced heavy lags after using my device for the first time (it was shipped with Android 4.2). A "wipe cache partition" in recovery mode got rid of the heavy lags for me.
Jun 2, 2013
This report applies to a Nexus device, and the issue tracker where you reported it specializes in issues within the Open Source source code of the Android platform.

We are not able to provide support for Nexus devices in this issue tracker. Please report this issue in the Google Mobile Help Forum at!forum/mobile/

Status: WrongForum
Jun 5, 2013
 Issue 40758  has been merged into this issue.
Jun 5, 2013
 Issue 40976  has been merged into this issue.
Jun 9, 2013
 Issue 41989  has been merged into this issue.
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