yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] linoman8:
I think that one of the most problems are the gapps. I've already tested a multiple roms (cm, aosp, aokp, pa, omni, carbon.......) with KK and L and most of the performance problems comes when you install the google software. If you run a aosp rom works like a charm, no lags and even good battery time. I also have a galaxy nexus and the problem is the same, even with the last official 4.3.

Now I'm testing this rom with f2fs and the Slim zero gapps Slim zero gapps and it seems to be working great, of course, no google background services transforming my tablet into a zombie.
[Nexus 7 Q&A, Help & Troubleshooting] dee-vious_dee:
I have made the decision to buy an iPad when the new version comes out in September. Google is doing way to much to force people to download all their stupid BLOATWARE. And when half the apps in the Google Play store don't even work worth a crap.

I have been on iOS since the iPhone 4 after I switched from a HTC EVO 4G and nice to know when I get something from the App Store it will work on my or any apple device I own and not constantly crash. There are no HTC EVO 4G's operating on anything newer than the OS it came out with.

Sorry Google you have forced me to go Apple.

I got a Nexus 7 a couple months ago to try give Andriod another chance and all I have done is spend time wiping it out and trying different rom just to make things work right and only ROM I have found to work is Cyangenmod 10.2, and even that messes up to much.

---------- Post added at 03:14 PM ---------- Previous post was at 03:13 PM ----------

I love the Android Widgets, but if nothing else works I can due without the lame widgets.
[Nexus 7 Q&A, Help & Troubleshooting] gsmyth:
I think you're right, I've seen other problems on other devices affected by Google play services wakelocks and it's frustrating. At least with a rogue app, once identified you can usually disable or remove it. But Google really need to sort their s**t out, especially when it's something like play services that is now mandatory if you're relying on gmail/play store etc, surely they can fine tune it a bit better.
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
OK... Here's my take on this...

I was one of the unlucky guys to NOT get 5.0 ota when it hit... My KK 4.4.4 experience was getting horrible so I was anxious to try Lollipop.. I ended up manually loading the factory 5.1 ROM... Worked nice... For about 3 weeks. Then it became unusable from lag. Clearing the cache partition would help, but only for a few hours... Or minutes... When 5.1.1 ota was offered, let it install.. Didn't help. I did a factory reset, and it was snappy again. For about 3 weeks. Did another factory reset.. This time I didn't install ANY apps... Just used what L came with... (Not very useful) to see if it would slow down.. After 2 weeks with no noticeable degradation, I started slowly adding my apps... But it didn't seem to matter WHICH apps I installed, each app added a little bit of lag. After 3 weeks, it was unusable again.

I think I tracked the problem down to IO. Specifically when it had to download something... If I left the WiFi off, it would be fine, and as sooooon as I turned WiFi on, it would lock up - presumably because every app was running to check for updated data out on the net. Also, using Elixir 2's TOP screen, I saw that every time the lockup/lag occurs, IO usage is above 50%. So the problem is related to the file system, but only in conjunction with internet data downloading... Could a custom IO scheduler fix it?

I tried a custom ROM with f2fs and it also went bad after 3 weeks. That was a ROM with NO gapps except the play store. (Optipop)

So everyone in this thread who keeps saying they did something and then it was snappy again, we need to hear back from you after 3 weeks ....

Currently, I rolled back to KK 4.4.2 and I'm not letting it update... I've loaded ALL of my apps (32g version) in an attempt to really push the system hard, and so far NOTHING is slowing it down... Its been 2 weeks now and its running a full speed, better than any previous test above did at the 2 week mark... Perhaps it has something to do with reformatting my data and cache partitions back to ext4... (Could a bad format have been to blame?). I dunno...

I guess I'll find out when I hit 3 weeks... I'll repost then.
[Nexus 7 Q&A, Help & Troubleshooting] ferossan:
I gave up. I have tried every single version of Lollipop and at the end the lags plagued my device.

Life is too short. Wiped everything and reinstalled Kitkat 4.4.4.

Full joy.
[Nexus 7 Q&A, Help & Troubleshooting] dee-vious_dee:
This is the perfect reason why I am going to an iPad. At least every iOS works on the very first iPads!
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
Actually, the first iPad only goes up to iOS 5... http://en.m.wikipedia.org/wiki/IPad_(1st_generation)
[Nexus 7 Q&A, Help & Troubleshooting] WibblyW:
... and it seems iOS users also complain old hardware runs the lastest iOS releases 'badly' (esp. iPhones). Grass always looks greener on the other side ;)

I think the Apple ecosystem isn't better. It's just different. Positives and negatives on both sides, depends what you you want...
[Nexus 7 Q&A, Help & Troubleshooting] C0derbear:
What WibblyW said. Came from iOS. It is really congruent features, just tradeoffs.

Go play with each device and see which GUI on what hardware works for you and go with it.

Secondary factors can be even more important ... The accessory ecosystem. Apple kills there because they are a single brand. Competition to that in Android space requires a vedor that simply ships huge volume. Like Samsung.
[Nexus 7 Q&A, Help & Troubleshooting] jrredho:
I don't know why no one has commented on this, but I think that this is exactly the problem that all of us are encountering.

I use a VPN app by default, which I'm sure slows things down a bit, but if I have my wifi on I get an real-time data rate summary in the notification pull down, and I watch has it downloads quite a lot of data each time the wifi is woken up. I know that the VPN slows things down, but I can also see the split between wlan and tun devices in the Misc section of OS Monitor as well with similar effect.

I think Google could do us all a huge favor by having app syncing activities run at a nice level that's appropriate for the given app. Turn the wifi off, and you too will think you have a different device in your hands. The instant you turn it on, you can pretty much watch as your device grinds to a near halt while all of that syncing, or whatever it is that Google is doing to drive data rates through the roof, is being done.

cheers,

john
[Nexus 7 Q&A, Help & Troubleshooting] gunnerhk:
That might be why things improved when I uninstalled google+.

It still lagged so I went back to 4.4.2.
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
Why would it benefit google to inflate data usage? They are not yet a mobile carrier. I am more than a little confused.
[Nexus 7 Q&A, Help & Troubleshooting] lastot069:
I just wish they would fix it! when an app updates i can do nothing but wait for it to finish. And what is with the iOS fanboy? apple need more buyers? cut the price in half!
[Nexus 7 Q&A, Help & Troubleshooting] Ophidian_DarkCore:
same thing with f2fs?

its a combination of really slow flash chips and art writing way more than dalvik, but im hoping that the 3.4 kernel will help.

i havent had this issue with the optipop rom though.

no freezes during app installs/updates.
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
So I'm still running stock with 4.4.2 and its been another week.. Still no UNEXPECTED freezes that render my nexus unusable, though occasionally I get slowdowns that are expected and explainable... (I.e. i get a lag spike immediately after switching on wireless after its been disconnected for a few hours) Then again, I'm intentionally running a LOT if apps And an active wallpaper (which really helps indicate system freezes)... So far I'm still very happy with performance... Tempted to let it update to 4.4.3 now and give it another 3 weeks to gestate...

I'm still very curious if reformatting my data and cache partitions have been part of the improvement... (Which I had to do when switching back from f2fs).. Though, I assume the system would have also reformatted when I switched TO f2fs, unless the switch doesn't actually trigger a reformat that scrapes all the sectors of the flash storage...

If someone else would reformat (not quick format) their partitions and then retry 5.1.1, I would be extremely interested in hearing if that changes anything about the lag issue... I'm very tempted to try it, but frankly I'm happy with the performance I'm getting out if 4.4.2 even with all google apps updated to current MD versions...
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
Clean flash to 5.1.1 using an f2fs ROM seems to work just fine for me, specifically optipop.

I've reflashed with a custom kernel and am trying ext4 now. I am hoping to find a kernel that supports f2fs, cpu overclock, 5.1.1, and fast charge. I don't see any that currently do support all of the above though, so I may have to compile my own if it comes to it.

I don't mean to sound rude, but many of these devs and their lackies have serious complexes on here, especially if you ask for ANYTHING to be added to their "baby".
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
Did you force it to long reformat the flash? I don't know for sure if it has to fully format the space when you switch file systems... I know on a windows machine I can quick-format and if I do that, it will not find surface defects in the HD... Is there even a tool to do that for android/nexus?

I used optipop in F2FS and it was great at first, but after 3 weeks it was unusable ...
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
I did a complete reformat of every partition. I am still looking for the method to extend the system partition; it is simply too small.

Also do not use all-f2fs, only cache and data if I'm remembering correctly should be f2fs, not system.
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
OK good! I'm anxious to hear if you squash the lag bug after 3 weeks :). And yes, system can't be f2fs with optipop from what I read.
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
OK, so as it turns out, when I posted the above, I was wrong about it being 2 weeks by then it was really just a few days... I installed 4.4.2 on may 27, so now its been two and a half weeks...

And I'm sad to report that I'm starting to have lag issues again. I'm getting delays between when I hit the power button and when the swipe to unlock is ready... I'm getting delays when I launch some apps... I'm seeing the spinning"wait" cursor freeze occasionally, and I'm seeing my active wallpaper bubbles pausing now and then... None of this was happening last week.

My device is not rooted, so I can't force a trim. I have been able to reboot and still see the delays immediately on reboot. I've cleared the cache partition and it seemed to help a little, but its still not like it was last week.

Its pissing me off so much because I've SEEN this device kick ass after a fresh install, and it just takes 3 weeks to degrade... WTF is android doing to cause this issue after 3 weeks??!?
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
dude jesus just root the device and set up a scheduled trim with one of the available free apps. otherwise sorry but youre SOL. for christs sake theres an auto root toolkit you dont even have to learn anything.

content;

still running nicely on optipop f2fs on cache only. need an overclockable kernel with fastcharge though.

---------- Post added at 01:28 PM ---------- Previous post was at 01:25 PM ----------

your three weeks number is stupid. i am sorry, there is no nice way to say that and still make my point.

if youre running a scheduled TRIM command you will not run into this 'lag' youre talking about. the flash memory on these tablets is getting old, simple and plain. its really really not that hard to address i physically cannot understand why people are still not listening?
[Nexus 7 Q&A, Help & Troubleshooting] rbeavers:
Still sucks. Tried it all. Going back to KK.
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
Wayfarer, when did you install optipop? What was the date?
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
i installed a while back after returning from florida, then reinstalled recently because i was too bold to take a goddamn nandroid, against the advice i give to everyone else, and bricked the tablet playing around with kernels. any lag that i have i have from day 1 and it doesnt noticably change over time (for me). i run emulators also, which i would assume id see a big performance hit in were there one to be seen.

also active wallpaper is more taxing on your tablet than you realise.
[Nexus 7 Q&A, Help & Troubleshooting] Ophidian_DarkCore:
setcpu can get it to 1500 mhz, you just have to adjust the 'hispeed freq' setting on the governor tab in accordance.

fyi, f2fs is stable on /data

when the 3.4 kernel gets stable i will do customized builds with whatever features requested. sm-6.0, all debugging off, 2ghz overclock capability, ram overclock, gpu overclock, all optimizations(Ofast, graphite, strict aliasing), module-less, patched to 3.4.107,
[Nexus 7 Q&A, Help & Troubleshooting] rbeavers:
It's good for a couple of days then just grinds to a halt, and your back to were you started. Not worth the weekly work.
[Nexus 7 Q&A, Help & Troubleshooting] skyline159:
I remembered this tablet is fast and fluid when I purchased it back in 2012, but now it is very laggy.

So I revert it back to Jelly Bean 4.1 the version it comes with and what a miracle! Everything is so smooth again like the first day.

This tablet is 3 years old, I don't expect it to perform like the recent high end one but with 4.1 it is perfectly usable and I'm still happy to use it :victory:
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
still on optipop 5.1

still having none of the issues described.

how long is this supposed to take to appear again? three weeks? seven days? a 'few days'?

root and run fstrim every single day on an automatic schedule. problem solved before it even appears. or dont, either way.
[Nexus 7 Q&A, Help & Troubleshooting] mausbock:
I tried to solve the issues like many others with wiping cache partition again and again but that is boring. I use the limit of 4 processes within developer option - background processes and have good performance. After reboot this setting has to be done again but I don't reboot the device often. Since 4.4 I enabled GPU rendering additionally.

It is not the best solution but without root and stock ROM the most practicable for me.
[Nexus 7 Q&A, Help & Troubleshooting] salutcemoi:
omg the lag was awful sometimes on KK
[Nexus 7 Q&A, Help & Troubleshooting] spidey88:
I figured out that my android lollipop didn't have google now launcher installed. Installed the google now launcher and it is working. But another issue arise which is the ability to rotate screen is missing. anyone facing this kind of issue using google now launcher? Thanks
[Nexus 7 Q&A, Help & Troubleshooting] salutcemoi:
Now launcher is limited tbh
[Nexus 7 Q&A, Help & Troubleshooting] YellowMango:
still choppy when tasks are involved with youtube, the screen doesn't wash out after watching videos any more

Feel smooth after lock min frequency at 204000 mhz
[Nexus 7 Q&A, Help & Troubleshooting] tagari:
Terrible performance for me

I've flashed the leaked image on my 32GB N7(2012) and i'm already thinking of reverting back to 4.4.4 ... It freezes even with one application only running...Haven't rooted it yet but i've never seen my N7 performing so awfully...
[Nexus 7 Q&A, Help & Troubleshooting] danielnbo:
I have a Nexus 7 32gb WIFI and the performance on KK was terrible.

Yesterday I flashed the factory image of Lollipop 5.0 directly from google's developers page and did the full process, erasing everything. The performance is also bad :( Even after reboot the tablet and then open one single application it sometimes takes about 4-5 seconds to open the app.

After some time of use the performance gets better but then it gets bad again. The facebook app took about 35 seconds just to open the first time !!!!

What can I do to try to increase the performance?? Some special procedure before flashing everything again??
[Nexus 7 Q&A, Help & Troubleshooting] JovieBrett:
I thought I am the only one felt that there's a serious issue within this build for our grouper.

KK wasn't really that bad for me at all but yesterday I tried to flash the leaked LRX21P image for grouper, I performed a clean flash for this one.

I didn't expected that this will make a very bad performance on lollipop for this device! I can't even stay on facebook for just a seconds of its because of crashing the app, I can't even slide or drop the status bar smoothly of at least 60fps! Freezes and lags most of the time! Any idea of why's this happening? and can we report this issue on their bug tracker? it seems that this is very unusual to happen at a first initial release for their 5.0 version!

Btw OT guys,

Why's that everyone is talking about bootloader's issue? I haven't had any issue when I flashed the bootloader included on the images I downloaded, I haven't encountered any issue when I started to click the script to flash and everyone's recommending to use the old bootloader that's using with JB and KK? is there any impact to the device's performance?
[Nexus 7 Q&A, Help & Troubleshooting] pzboyz:
Yep same here, I reset my device, then downloaded the new image over ADB, performance is not great. Tapping the square icon, to swap between applications, is very slow. Would be good to have the option, just to show the last 5 items or something.

Maybe am option to turn off some of the fancy graphics effects should be added.

Are Nexus 4 owners complaining?
[Nexus 7 Q&A, Help & Troubleshooting] JovieBrett:
Official images for Nexus 4 isn't out yet tho they have the beta one made from source.
[Nexus 7 Q&A, Help & Troubleshooting] bagl0312:
I flashed the official lollipop images (without "-w" option).

Performance are really awful. It lags opening any app.

I am almost not able to open a page in chrome.

I am really thinking about reverting to Kitkat
[Nexus 7 Q&A, Help & Troubleshooting] djtinxo:
I also flashed the original factory image from google's site and in the begining performance was reeeeeeally bad. Animations were slow, so was multitasking. BUT after doing a factory reset and cleaning cache, I can say that performance is alright.

BTW, does anybody know how to enable the multitasking tabs in chrome 39?
[Nexus 7 Q&A, Help & Troubleshooting] gizzmoffm:
fstrim not working?

Hi there...

I flashed the factory image and also think that the performance could be better.

I tried to trigger the integrated fstrim using adb shell:

am broadcast -a android.intent.action.ACTION_IDLE_MAINTENANCE_START

On my Nexus 4 (which is still on 4.4.4) I can see fstrim messages popping up in logcat.

On my Nexus 7 I do not see these messages.

Any idea what's wrong? Seems like a bug...

I also opened https://code.google.com/p/android/issues/detail?id=79264 - it also contains the logcat output

BTW... wiping cache seems to help - at least for a while.

I think during/after initial boot, the cache partition will be used extensively.
[Nexus 7 Q&A, Help & Troubleshooting] TonyHoyle:
I installed the final build as a full factory flash and it was so slow I rebooted it 3 times thinking it was hung... it was just taking ages to do anything. I'll give it a day to see if caching improves it then maybe go back to KK (or earlier).
[Nexus 7 Q&A, Help & Troubleshooting] AJ06:
Its pretty terrible. Lags a lot sometimes. It's the stock kernel and nand performance.

I may give up on this one and get a 2013 model haha.
[Nexus 7 Q&A, Help & Troubleshooting] noldar:
On my16GB 2012 n7, everything is ok.

I clean flashed, cf-autoroot boot, long first boot, performance really improved for me.

Tapatalked
[Nexus 7 Q&A, Help & Troubleshooting] Letitride:
My feedback on the latest official Google release for N7 2012 WiFi factory rom:

Well, the only positive gain coming out of this upgrade is that with a factory reset, full wipe & clean install - I got all 27+ GB usable space back again (out of the 32 GB, the rest used up by the Lollipop OS)

it was buggy by using ADB to flash the boot.img & system.img extracted from the d/l Google server since the bootloader is current, and was getting errors with root & SU - latest TWRP was working; played with the beta TB app and got things restored. It was at least responsive then (24 hours ago.)

Then, I went ahead with (and normally, I hate using toolkits) full factory install after wipe, setup & bootloader again - got root (CF's) and re-installed recovery partition (TWRP) and - it only partially restored my Apps from Play Store ... and, slow as a TURTLE !! crawling, especially opening app's screen - took several tries to open FB. It's as if the N7 is in a deep sleep mode & need to be awaking (to conserve battery ??)

Normally, I quick swipe & I can jump among the screens - it's now having a mind of its own. Exiting or closing an App seemed to take a few seconds .... almost feel like running the old Gingerbread stock rom. After wiping dalvik cache - that "Android is upgrading" optimizing app is taking forever (grante that mine has 167 to do, usually it's no more than a few minutes) - reading & skimming the comments & feeback posted here, there's plenty of good company all around. Yikes - and, this release has already been held back for a week+ due to bugs & further testing, and this is the best Google can do. OT, I think now going to hold & not upgrade our 2 Nexus 5 devices for now, until things sort themselves out in the coming weeks - this is nuts !

Postscript - after a few hours of letting the rom settled & a few Play Store updates, wiping dalvik cache again, turning off background sync. for photos, etc. - this is a bit more responsive now than earlier. Will go thru all the hidden settings later on to see - signed into AmazonApp Store & worke/restored my paid Apps, beta TB working with roots, and beta MX Player (L 5.0 special build) are good - no major FC'd and Youtube is streaming just fine now.
[Nexus 7 Q&A, Help & Troubleshooting] IntenseColor:
After switching from the "Google Now Launcher" to "Launcher" it feels much smoother.
[Nexus 7 Q&A, Help & Troubleshooting] khaytsus:
Well this is all making me happy I didn't switch back from AOKP 4.4.4 with m-kernel and f2fs. I want to try L but not if it's going to bring the lag even harder. I can only imagine it does, considering encryption etc.

Maybe when there's f2fs for it, or CM12, etc...
[Nexus 7 Q&A, Help & Troubleshooting] redmonke255:
Works fine as long as you aren't doing anything that's using the storage. When the device needs to redownload all your apps, settings, and mail it's pretty slow. But it was like that on KitKat to.
[Nexus 7 Q&A, Help & Troubleshooting] Salty Wagyu:
Runs pretty bad really, and only got 3 other apps installed with the included google apps - so storage is pretty much empty. Everything is very choppy.
[Nexus 7 Q&A, Help & Troubleshooting] AndDiSa:
Yes, it's nasty, but I noticed, that especially the very old Nexus 7 devices become very very laggy if the free space of the /sdcard goes below round about 4GB. Try to free up some memory, run fstrim on /data and you will have a responsive device again, even with Android 5.1.1.