yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] techniq35:
Decided to backup my Nexus 7 using "adb backup" as I wasn't rooted to use Titanium Backup and performed a factory restore and then restored from the backup. So far everything is back to it's responsive self. Before the reset, Jetpack Joyride would take 2-3 times longer to load than a coworker's Nexus 7, now they are the same.

One thing I noticed after restoring, is I had a TON of notifications (22) from 2 games (FLCommando and Samurai vs Zombie) that I had disabled the notifications for. Each notification was typically on a different day going back to 7/25. I wonder just because the notifications were disabled if they don't build up (they're hidden instead of deleted) and might cause sluggishness. I decided to delete them as I don't play them anyways.

Btw, this was the first time I used "adb backup" and it worked great (restored all my games and progress, wallpaper, desktop icons, wifi access points, etc) except it didn't restore any of my accounts (Google, Github, none). I'm putting them on now, we'll see if it causes the device to get sluggish again.

I ran the update using: "adb backup -apk -shared -all -f backup.ab"
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
The I/O issue MAY be the cause of it.

Here's what happened on mine:

1). Stock and rooted using WUG Toolkit

2). Had my N7 for almost 1 month now, no lag whatsoever

3). For the last 2 days, I have NOT MADE ANY CHANGES - no new apps, etc.

TODAY, I copied about 4 Gb of files (Comics, PDF, Movies, etc.). With all the games I installed, my free storage went down to 2GB.

Then BAM! Nexus 7 laggy like hell.. all apps open very slow.. heck even opening up the Setting Apps takes forever.

I removed about 2GB of data..giving about 4GB free storage and now my N7 is smooth again.

Copied large files again.. giving about 2GB left in the storage.. lag comes back....

So what.. now I cannot use most of my storage and must leave at least 4GB free??

Dammit Google.. get your **** straight! This is supposed to be THE Android tablet. It seems every Android tablet I have had issues (Xoom -> Transformer -> Galaxy Tab -> Galaxy Tab 7 Plus -> Nexus 7) to the point it almost makes it unusable and I spent a lot of time fixing it. I am no Apple fan, but I had iPad 1 and 2 (sold both of them now) and I do NOT RECALL spending as much time as I did with Android tablet fixing those iPads..
[Nexus 7 Q&A, Help & Troubleshooting] seakins:
I only have 800mb free space remaining on my tab and it still runs fine. No lag whatsoever!

When I did install a bit to much and only had 200mb left of free space, it did give a notification that my free space was running low and some apps would not work properly. At that point it was a bit sluggish but i just deleted a bit and up until having 800mb free all is back to speedyness!
[Nexus 7 Q&A, Help & Troubleshooting] MeekB2G:
Wow. I just looked at my free storage and it's a 2.5GB's I'm gonna free up some more space to see if this speeds up my N7. Thanks in advance.
[Nexus 7 Q&A, Help & Troubleshooting] rmm200:
Number of files is bigger issue than size. Make sure you use .nomedia - and that it works. Media scanner is suspect.
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
Thanks for the info!

The space may not be an issue, but during my test, the lagginess happened as soon as put large files back (2GB+), resulting in less than 3GB left of space. However, I think it has to do with the I/O (as I mentioned above), so JB may doing some "caching" or something to process the files and that's why it slows down.

As soon as I took off 2GB, it work fast again.

Another reason could also be the Media scanning, but I don't have hundreds of files in those 2GB data, just about 60 files.

---------- Post added at 11:29 AM ---------- Previous post was at 11:29 AM ----------

So just create a file called .nomedia and put it in any folders I don't want Media Scanner to scan?
[Nexus 7 Q&A, Help & Troubleshooting] rmm200:
Zero length file, named .nomedia is - supposed - to work.

There is one other thread where something strange is going on in spite of that file.

Check your active apps display. If Media Scanner does not show up, forget about it.

If it is using a fair percentage, try this and see if it helps.
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
I use an app called Usage Timeline Free and Google Current DOES seems to use 10-20% all the time with the Background Sync ON.
[Nexus 7 Q&A, Help & Troubleshooting] sachinbhuriya:
You are right

Dear frnd !

I am agree with you this is not a good speedy phone for use.No one even great tips can solve the problems which are using in manual
[Nexus 7 Q&A, Help & Troubleshooting] androidkid311:
Check the lag thread I opened in general thread. Might be helpful to you :).
[Nexus 7 Q&A, Help & Troubleshooting] JakeRoux:
Thanks, was not aware of the Lag thread. If, in fact, this is an I/O issue, hopefully it can be fixed with a future stock firmware release.

After resetting mine last weekend, all is still running smoothly after adding back several more apps. Regarding the specualtion that the I/O issue may be related to large single files stored on the device, I had previously "pinned" (not sure why we can't just say downloaded) the Transformers movie to to my device, but have not done so agan since doing the factory re-set. Again, not sure exactly what fixed my previous lag issue, but hoping it will stay fixed.
[Nexus 7 Q&A, Help & Troubleshooting] burnduck:
I managed to induce the I/O lag by means of downloading huge amount of data from Google Music, and for some reasons the slow I/O stayed even if I remove all the music I've put onto the device. :/

Bugger.
[Nexus 7 Q&A, Help & Troubleshooting] rmm200:
Best guess is that the music was downloaded one place, and then moved to a music directory. Removing the music only cleaned the music directory; there is another copy hiding someplace.

And media scanner finds it...
[Nexus 7 Q&A, Help & Troubleshooting] jamesst20:
There is for sure an app in background that eat your cpu/ram. This make your battery life lower and of course make the device slow.

Your only hope: find and remove the apps causing this. Otherwise if you cant find, factory reset :/

Envoyé depuis mon Nexus 7 avec Tapatalk
[Nexus 7 Q&A, Help & Troubleshooting] TeamHackura:
upon getting my nexus 7 i rooted it immediately and began the addictive path of flashing anything and everything i could. i started experiencing major lag to the point that my sgs2 running unclocked was faster. i tried ALL the tricks in the forums and still had the smae lag. i decided to factory reset my tab to stock and just root it. it has been running MAZING since then. maybe ill change kernel if it starts to get slow but for now its great even while accessing memory(installing apps,running backups,ect.). I think i am so used to jumping to replace the factory rom sicne i always get phones that have the google os under a bunch of manufacturer and provider crap. google made this device and put a lot of time into making sure that their rom runs well. i will stick with it for now.
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
The problem I have, and others too, is that even with stock ROM and rooted, the N7 can still lag heavily.
[Nexus 7 Q&A, Help & Troubleshooting] Salty Wagyu:
My Nexus 7 began to feel slow, so I restored with a TWRP backup I made two weeks ago which I know to be absolutely fine, but the same slowdowns occurred the moment I booted into my restored backup. Apps not responding for a few seconds, horrible performance when Google Play is updating apps, keyboard press delay etc.

Something is really suspect. Going to factory reset tomorrow probably, or better yet flash a google factory image via a toolkit.

Edit: I'm getting 1250 I/O in Quadrant, this might be why. The average for a stock rom is about 1700-1750
[Nexus 7 Q&A, Help & Troubleshooting] handfish:
Just want to say that my Nexus 7 (rooted + stock rom) runs for a very short period of time after reboot, and then it crawls like a turtle... jeez. In comparison, my Galaxy Nexus simply flies. Same apps, same work, the Nexus 7 is 10 times slower.

Note: I only have a stock calendar widget on the home screen and all the other 4 screens are empty!

Used apps like "OS Monitor" to check the CPU usage - everything appears to be normal.

Memory consumption is normal.

Battery consumption is usual - no sudden spike or anything according to the Battery Monitor Widget app.

I did a factory reset and it helped. Though as soon as I start using the thing (well, all I do is web browsing, emails, calendar and google reader), it starts to slow down. Therefore, factory reset is *not* a solution; it is only a temporary workaround to "delay the inevitable"!!!

ROM / Kernel issue? Or something else? Puzzled and disappointed.
[Nexus 7 Q&A, Help & Troubleshooting] TeamHackura:
GL

Hope the factory reset works. I used the toolkit to reset it and it resolved all my issues. tried another kernel out of curiousity and had no adverse effects. i really want to flash a rom with better integrated asop browser but dont want to mess anything up
[Nexus 7 Q&A, Help & Troubleshooting] Bielinsk:
I am completely stock and everything had been fine since I received it, then all of a sudden, it sucks, terrible slowness, just unusable.

Only things I can think I have updated. Legend, some Glu game. I noticed it was using a ton of CPU so I removed that and every GLU game. I don't really trust that company for some reason.

Updated Amazon app store.

Updated Swype.

Bought and installed Horn.

It now takes about 4 minutes to boot to a screen that loads all widgets and is usable.
[Nexus 7 Q&A, Help & Troubleshooting] Salty Wagyu:
Yeah it resolved my issues, I/O back at 1764, everything is more responsive. Hoping it doesn't happen again now, going to install less apps than before to start with.
[Nexus 7 Q&A, Help & Troubleshooting] phcahill:
Lets contact Asus and Google about this

I have opened a case with Asus. Could others please do the same. I don't know how to open a case with Google. If anyone does, please post a link.

Regards

Paul

There is an issue with the 16GB Nexus 7 that many people are finding.

If this tablet is filled up with files, e.g. video or music files, until there is less than 3 to 4GB free, the tablet dramatically slows down. Apps are very slow to load. The interface becomes jerky.

Benchmarks show very slow sequential and random writes. This appears to be the cause of the issue. The only solution appears to be a factory reset. However the problem will come back.

http://rootzwiki.com/topic/31490-very-slow-nexus-7/

http://xdaforums.com/showthread.php?t=1811432

http://www.modaco.com/topic/356978-n7-slow-down-laggy/page__st__20

http://xdaforums.com/archive/index.php/t-1808952.html
[Nexus 7 Q&A, Help & Troubleshooting] phcahill:
Please add your 2c and androbench results to this thread I've started on Google's product forums. Maybe google are watching.

productforums.google.com/forum/m/#!topic/mobile/loqbCbKVMWE

Paul
[Nexus 7 Q&A, Help & Troubleshooting] AlBigGuns:
Very unhappy with my Nexus 7. I'm suffering from slowdown whilst browsing, I did a complete reset at the weekend and it worked again for a couple of days but yesterday the browsing experience was laggy again. It's incredibly frustrating. Has there been any word from Asus or Google on this? I have 12gb free and I'm still suffering.
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
I've been monitoring this issue on my N7 and I noticed that the lag happened when there is background Internet access going on.

Example

- Open Flipboard, it'll sync the content. While that is happening, press home and start another app...lag.

- open Chrome, go to some website. Press home and start another app, lag.

- open Google Play, download or update apps....lag.
[Nexus 7 Q&A, Help & Troubleshooting] Agosh13:
Same problem, please star this ISSUE: http://code.google.com/p/android/issues/detail?id=37258#makechanges
[Nexus 7 Q&A, Help & Troubleshooting] hello_world.c:
This fixed it for me

I installed watchdog task manager lite in the hope of finding the culprit of the slowdown.

And suddenly everything is snappy again! No reboot, no other changes in the configuration, nothing. Just installing this app. This is crazy!

But ...crazy in a good way! :)

Thanks for the tip, dilldoe!
[Nexus 7 Q&A, Help & Troubleshooting] shootdaj:
I want to confirm that disabling background sync in Currents was indeed the solution for my case. I went into Google Currents > Settings and unchecked "Enable background sync". I had also uninstalled a bunch of apps, but I checked after uninstalling each one (yeah, I know, silly way of debugging, but hey it seems to be the only reliable way). Not sure what this option specifically does that slows down the device so much. There are other apps on my device that do backgroud sync (gReader, Gmail, reddit, facebook etc) but none of them seem to be slowing it down (and Currents was installed on there by default!).
[Nexus 7 Q&A, Help & Troubleshooting] kieso:
I definately will add there also!
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
I went as far as DISABLING Current from Settings --> Apps (I use FlipBoard instead) and the lag still happens. As mentioned in my post above, I strongly believe it has to do with background INTERNET / NETWORK connection.

I have done exhaustive test by comparing my N7 with my Galaxy Note and Motorola Triumph and I can see the N7 lags much worse. Example:

1). Flipboard app

Run this app at the same time in all 3 devices. N7 lags..even as far as showing a pop-up box saying "Flipboard is not responding". But moments later, its good. The Galaxy Note and Motorola Triumph chug along just fine.

2). Chrome

- Open Chrome, go to some website. Press home and start another app, N7 lag...2-3 seconds before the desktop is shown. Galaxy Note does not, Motorola Triumph..just a bit (The later one runs Gingerbread and have much slower CPU, BTW...)

I reset the N7 multiple times already, including hard reset, clearing Dalvik and Cache, etc..etc.. The lag disappear, then shows up again.

This makes the N7 truly NOT enjoyable to use. Imagine you're browsing some website and received an email and want to switch to the email app and...lag for 2-3 seconds. Trying to do some light work by RDP-ing to my Windows server... lag.. It's beyond annoying I am begun to look for other tablet.

I recommend everyone to "star" the issue in the link: http://code.google.com/p/android/issues/detail?id=37258#makechanges
[Nexus 7 Q&A, Help & Troubleshooting] Chargree:
Maybe a fix?

Okay, so I have a first batch Nexus 7 ordered online while the Google I/O keynote announcing it was still winding down. A few weeks ago I loaded it down with so many apps only 1.7 GB remained and the slowness bug showed up. I rebooted, re-rebooted, deleted apps, cleaned caches but nothing worked....at least until yesterday. What was it you ask? Well, let me tell you.

I went into Settings and unchecked two items:

Settings -> Developers options -> Disable HW overlays

Settings -> Developers options -> Force GPU rendering​

At first, there was an barely perceptible speed increase. As the day evening wore on the N7 got faster. I was giddy but still cautious. This morning is was faster still. Things were looking up. Right now, it is "buttery smooth" once more! I don't know how long it will last. I am running all my apps again in the case something else normally in the background happened to be off. Still buttery.

Maybe one of the two settings above had a memory leak that slowly grew. By turning off the settings, the N7 was slowly able to clear the leaked memory and return to normal. I am dying to hear if you if this tip works for you too
[Nexus 7 Q&A, Help & Troubleshooting] CHollman82:
Just like any computer, the N7 has a limited amount of RAM. RAM is where code and data lives when a program is running, the processor fetches code from RAM to execute, this is literally what makes anything happen on any computer that distinguishes it from a paper weight... if you have too many things running and using RAM the OS has to swap stuff out to a temporary buffer on the larger but slower storage (HDD's in a computer, flash memory here), this slows everything down because flash memory is much slower than RAM.

The android OS has a very intelligent garbage collector that automatically determines when objects in RAM are no longer needed and allows them to be overwritten. In addition to this it is able to end running applications that are not active or in the foreground whenever it sees fit. However, third party applications can install system services that run all the time and cannot be ended by the OS in order to free up RAM for running applications. If you install too many of these you could run into the "laggy" operation that people here are describing.

There is a way to view running services, I don't have my N7 with me at the moment but on my Evo you go to settings>applications>running services. This page should also show you your memory usage. If you are using the majority of your memory when this sluggish operation is observed try shutting down some of the services in this list until you have > 25% of your memory free.
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
My Note have slower CPU and less memory, yet its not as laggy as the N7. Interestingly, I have far more background apps than the N7.

Using ZDBOX, the Note is shown to hAve about 13% free memory while the N7 have 37% more.

---------- Post added at 04:16 PM ---------- Previous post was at 04:14 PM ----------

I have with unchecked out of the box.
[Nexus 7 Q&A, Help & Troubleshooting] Ahmazin:
Just Curious

I've had the slowdown as well, that has made the Nexus 7 unbearable to use. I've don't factory resets, Cleared cache, etc. I found that after resetting, all the app data still remained, and the content (Videos, Music) still remained.

I found that, when I delete all app files and content first, then resetting the Nexus 7 was the only way to get the N7 back to it's snappy self. The first time I did it, I thought it was a fluke and that I had downloaded an app that caused an issue. I downloaded apps again, but much more carefully. After the installation of an app, I would test the functionality and responsiveness and would continue on if there were no issues.

Everything was fine until I started filling up my storage space. I found that the Nexus 7 ran fine until it was under about 3GB left in storage. The Nexus 7 would then start to lag severely, making it unusable again.

So I was curious, how many of you had less than 3GB of storage left when the N7 starting the slow down?

I've delete and reset again, staying well above 3GB of storage (My Videos and Music are kept on a 16GB micro sd card now) and the N7 is working great.

Is the storage filling up, the problem here?
[Nexus 7 Q&A, Help & Troubleshooting] lanwarrior:
Quick update: after upgrading to 4.1.2, the lagness is gone...for now... I will keep monitoring this.
[Nexus 7 Q&A, Help & Troubleshooting] TeamHackura:
yes i also had HORRIBLE lag due to I/0 speeds. I hit it with the one two punch. I returned my c60 and got a c80 replacement. Seemed fast enough but of course the issues dont rear their head until tablet has been used for a bit. I quickly installed 4.1.2 stock and seemed good. i rooted and installed custom roms(all 4.1.2) and have had little to no problems!
[Nexus 7 Q&A, Help & Troubleshooting] Gujs:
I have the same problem with my Nexus 7 16GB. I went to business trip and PIN a lot of music from Google Music. I only left 1.5GB of free storage and lagging kicked in immediately. After I unpined some music to get more than 3GB of free storage all came back to normal.

My Nexus seven runs on 4.2.2? Does anyone know if google have a plan to fix this? Does 32GB has the same problem?
[Nexus 7 Q&A, Help & Troubleshooting] thevuman:
Smh @ Google and Asus... So really, ur not getting 16gb/32gb..Ur really getting 3gb less...unless u want your nexus to lag to the point where u want to throw it against the wall.

Forever gone works, and is great, but it's only a temporary fix... After all updates or install, lag comes back.
[Nexus 7 Q&A, Help & Troubleshooting] jamiethemorris:
Forever gone fixed it for me for now. Then I used an app called lagfix that enables trim. You can schedule it to trim automatically. I haven't used it extensively but if you look at the reviews most nexus 7 users are very happy with the app. Everyone with a N7 having this issue should try this app in addition to forever gone.

Also any computer will slow down if you use up a lot of storage. I like to keep 20% free.
[Samsung Epic 4G Touch] dja2k:
Okay I sold my phone, but the person wants nothing to do with Root or Custom Roms, so I have to return this phone to stock Sprint Settings. From what I gathered, I will be flashing Shipped Rom S: D710.0.5S.EG30 Gingerbread 2.3.4 because Official OTA S: D710.0.5S.EL29 Gingerbread 2.3.6 is Rooted from Here. I suppose I can use the Stock Shipped Rom and then let it update OTA. See if you can help me out too, I forgot the ## codes to Reset data and disactivate device and make it ready for new activation. Thanks

dja2k
[Samsung Epic 4G Touch] rovar:
Cant help you with the codes but you shold be flashing the stock FF18 or EL29 for gingerbread. Used sfhubs one click package to flash either. Then use the auto-root package to return to stock.
[Samsung Epic 4G Touch] brooksyx:
Just download the Odin one click el29 stock and then apply the ics ota update. Completely stock.
[Samsung Epic 4G Touch] dja2k:
Thanks! I got it, so install Official OTA S: D710.0.5S.EL29 Gingerbread 2.3.6 even though its rooted, then unroot with auto root package. Funny how you know these things, but when it matters, you completely forget about the procedures.

dja2k
[Samsung Epic 4G Touch] dja2k:
Going to try this instead, the other method which I thought would work didn't.

dja2k
[Desire Q&A, Help & Troubleshooting] salefor:
Recently I installed [BETA 0.16][01.08] ICS for Desire[ALL HBOOTS][4.0.4] on my Desire.

I have 2 problems...

1. Sometimes I don't receive SMS. The sender has delivery report, but I don't receive the SMS. Does anybody experienced this?

2. Sometimes my contact list is empty and I have to turn off the phone and reboot. After restart everything is fine.

thanks,
[Desire Q&A, Help & Troubleshooting] thif:
I'm using sandvold's ics 0.16 as well.I used eariler version with cm7r2 hboot and now on stock hboot, I've never had the problems u mentioned. Actually i'm using exDialer for contacts & go sms for messaging, but no problem so far.

Did u full wipe before install the rom? Maybe it can be the solution.
[Desire Q&A, Help & Troubleshooting] salefor:
I did full wipe before installation. I'll try to re-install the ROM again. (What about "Dalvik cache" did you move it to SD?)

Also I have battery problem, it turns off on 19%. I tried to calibrate the battery but it doesn't work.
[Desire Q&A, Help & Troubleshooting] japestinho:
Did you experiencing any problem with data script? Because I used amarullz and stock hboot but the script seemed not working well
[Desire Q&A, Help & Troubleshooting] salefor:
I don't know about data script. I used revoked and then I followed instructions for installing the ROM.

I solve the problem with battery calibration (the battery is still draining too fast - less then 10hours) and I installed Ghostly SMS for messages. I'm not sure any more do I miss some SMS. For contacts problem I have no solution yet.
[Desire Q&A, Help & Troubleshooting] castexyz:
do you have any led notification issues with sandvold 0.16 and go pro sms?
[Desire Q&A, Help & Troubleshooting] thif:
i'm on stock a2sd with y/n/y. no problem so far

---------- Post added at 10:20 PM ---------- Previous post was at 10:15 PM ----------

yes i've the same problem. no led notifications for sms.

i think sandvold will solve the issue with next releases