yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] jcorey:
I have come into an interesting situation with this lollipop business. After I/O 2012, I immediately pre-ordered two Nexus 7s for myself and my wife. Everything was bliss until about two months later when I dropped mine and cracked the screen. That rendered it useless. I checked all around about replacing the screen, but the costs were about $170, so I just went ahead and bought another new at WalMart. That broken one has sat in its box in the closet for close to three years.

With the current one, I upgraded to Lollipop as soon as I could (it was great on my Nexus 5, so it'll be great on my Nexus 7, of course!). Soon after, things slowly (pun intended) went downhill. Eventually, I just barely used the table at all because it was more aggravating every time I looked at it. I tried all the fixes, some would make it snappier for a little bit before degrading to a crawl again. Many times, it didn't recognize the swipe unlock in time before it timed out. Many posts talked about the flash just wearing out from reads/writes over the last several years. I just accepted life without it.

Then I remembered that old broken thing in the closet and it hit me. I could replace the screen with this crappy Lollipop one! Since it's been idle, it's flash isn't wore out. I did it and I was back in business. It woke up, and shortly was telling me of new system updates. It spent most of the day installing one update after the next. Finally it was on Lollipop, I got most of my apps set up and configured before going to bed. The next day I took it to work and wouldn't you know it, I went to use it on my lunch break and it was going slow as my other one. After one day of use it was just as bad as the others. So I went back to Kit Kat and it works. God, I miss the Lollipop features though.
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
try something other than stock 5.1.

specifically optipop with f2fs on CACHE ONLY not on data. i dont believe f2fs helps on data, personal opinion only.
[Nexus 7 Q&A, Help & Troubleshooting] WibblyW:
This seems to have improved things for me so far too :)
[Nexus 7 Q&A, Help & Troubleshooting] jadesse:
What features? There isn't anything that special or anything that I can't live without in 5.0. Google created a giant TURD with 5.0 at least on the N7 2012. I am going back to KK as i am fed up myself.
[Nexus 7 Q&A, Help & Troubleshooting] walrusmonarch:
I tried to go back to KK after getting tired of LL totally ruining the N7... A couple of days later, the lag came back...

I ended up going back to the oldest jellybean firmware posted by google, 4.1.2

So far, it has been 6 days, and no lag whatsoever. FINALLY!
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
Well, it's been 3 weeks+ since I went back to 4.4.2 after reformatting my cache and data partitions... and my N7 2012 is still usable, but I do experience frequent lag spikes. Occasionally I go to turn it on and have to wait just to swipe to unlock.., sometimes even so long that the swipe to unlock screen times out.. it's still better than it was after 3 weeks on lollipop..

I haven't rooted it yet, so I can't force it to trim... and I can't yet find the right way to check to see if it is even running trim on its own... it's supposed to trim when it's over 80% battery or plugged in, been unused for an hour, and hasn't trimmed within 24 hours. But I can't tell if it's actually doing that... perhaps it's in the logs but I haven't learned how to read em yet.

I think I'm going to give 5.1.1 optipop another try with fstrim on auto timer per wayfarer's suggestions and try another 3 week test.

In the mean time, I have purchased a galaxy tab S to actually get some stuff done. Damn, this thing is fast.
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
I use mine for entertainment only. So if it takes 1-2seconds to open chrome, that's not huge lag to me. Is this what you all are talking about? Also, newest chrome update is garbage.
[Nexus 7 Q&A, Help & Troubleshooting] TonyHoyle:
10 seconds + to open chome, typing a URL is so slow I finish typing then sit back and wait for it.. rendering the page is so slow it often says 'Chrome has stopped responding'.

That's after a reboot to clear down the apps too..
[Nexus 7 Q&A, Help & Troubleshooting] GtrCraft:
Don't use chrome, our N7 cannot handle it
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
i cannot say i experience this whatsoever.

---------- Post added at 02:30 PM ---------- Previous post was at 02:29 PM ----------

again, i cannot agree and do not understand where this stuff is coming from. posting from my n7 using chrome right now. no keyboard lag no tab lag.
[Nexus 7 Q&A, Help & Troubleshooting] GtrCraft:
2012 or 2013? And did you clean flash in the last 3 weeks?
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
2012. i cant tell you exactly the date i clean flashed (issue causing me to reflash was NOT performance but my own error flashing kernels) but it has been about 3 weeks now.

i also think the three week number quoted by many is flat out stupid. some people mention 'two days' some people mention 'a few days' some mention 'about three weeks'. all these numbers are stupid and add nothing to the discussion. you either experience the issue or you do not.

it is my firm belief that provided your tablet does not have a physical issue with the cpu or memory that a full format (not wipe or factory reset!) and clean install WITH an automated trim command DAILY or TWICE DAILY will resolve this issue for most - if not all - users.
[Nexus 7 Q&A, Help & Troubleshooting] AndDiSa:
I think [MENTION=829640]fwayfarer[/MENTION] is right. Since I freed some memory (there are now about 5GB free), enabled ksm and running fstrim from time to time the lags have reduced very much. They are not completely gone, but I am noticing lags especially when play services are looking for updated apps in the background! Other than that the tablet performs still very well.
[Nexus 7 Q&A, Help & Troubleshooting] Trimbleepic:
That's bs... the N7 can handle chrome just fine, when not affected by the lag monster... (i.e.. shortly after factory reset/reformat)... so unless chrome's cache is part of the problem, (which is probably the case), chrome itself is not a challenge for the N7.
[Nexus 7 Q&A, Help & Troubleshooting] dalanik:
I had lag on 5.x and then I just went for custom ROM. No lag whatsoever, it is almost as fast in 90% of the use as the KK. The ROM I'm using is Chroma, and it really works OK. Let me just say that I'm VERY sceptical about custom ROMs, but this really works.. It is as stable as stock and as fast as KK (a BIT slower sometimes, but nothing that would annoy you).

I believe the MAIN reason for this is that Chroma (and other custom ROMs) have disabled FSYNC (or rather dynamic FSYNC, which is basicaly the same thing) that really speedup disk operations. It is perfectly safe to use this setting since this is used only to prevent data loss if there is power failure. Since our device uses battery, there can't be power failure (suppose you never let your battery drain completely) and the performance increase is drastic.

So, IMHO, just try Chroma and you see it will solve all your problems. And you'll get extra features too like LAYERS if you like customizin the look of your ROM (Like I do, i.e. I really hate white backgrounds in Lilipop so with LAYERS it took me 5 minutes to change everything to black).

Cheers,

D.
[Nexus 7 Q&A, Help & Troubleshooting] walrusmonarch:
I have tried all sorts of custom roms. They all lag for me, be they based on KK or LL. After flashing what feels like a million roms and stock images ranging from JB to LL, 4.1.2 is the only one that seems to work for my N7. It has been about three weeks now on 4.1.2, and absolutely no lag whatsoever!

Forget updates, I just want my tablet to actually work :)
[Nexus 7 Q&A, Help & Troubleshooting] skyline159:
I'm in the same boat as you, came back to 4.1.2 and absolutely happy with it :good:
[Nexus 7 Q&A, Help & Troubleshooting] gunnerhk:
I'm running cm10.2.1 (4.3.1) and still no lag after 2 months.

You should give it a shot if you want something SLIGHTLY newer :D
[Nexus 7 Q&A, Help & Troubleshooting] WibblyW:
If I install, say, stock 4.1.2 is there way to stay unrooted and prevent nags for OS upgrades?
[Nexus 7 Q&A, Help & Troubleshooting] walrusmonarch:
I've just been ignoring the OTA notification so far. Too lazy to stop it from nagging me :p

Anyways, if you stay unrooted, I think you can uncheck 'show notifications' for google services framework under settings/apps/

I've never tried that myself, but apparently that is one way to do it.

Edit: Keep in mind though, that this may disable other notifications you may want.
[Nexus 7 Q&A, Help & Troubleshooting] barrack1:
After reading through the pages, I can gather several problems, some of which might not have anything to do with the roms themselves like

- going over 4Gb(? for 8Gb models) in internal storage which might slow down read/write speeds, probably due to the perf limitations of the Tegra soc

- excessive google updates (wifi connected), could be a bug

And anecdotal reports of LP roms looking fine until a few weeks later which could be due to the slow read/write perf once the cache or internal storage gets filled up.
[Nexus 7 Q&A, Help & Troubleshooting] walrusmonarch:
I decided to give this a try. Not bad at all. Now I have slightly newer firmware and more customization :p
[Nexus 7 Q&A, Help & Troubleshooting] WibblyW:
I'm experimenting with 5.1.1 stock with ALL Google accounts set NOT to sync. Obviously this isn't for everyone (all the the Google stuff becomes pull rather than push)... Too early to tell if this stops the lag more than for a short time.
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
You guys can keep cargo cult-ing these weird "fixes" OR just root install optipop and set up an automatic scheduled fstrim already.

Building a bamboo control tower and plowing a grass field will not make the airdrops return guys.
[Nexus 7 Q&A, Help & Troubleshooting] gunnerhk:
Optipop with fstrim was fine for about a week and then it started to lag. My other nexus 7 with cm 10.2.1 has been running smooth for a while now.
[Nexus 7 Q&A, Help & Troubleshooting] walrusmonarch:
Tried it, still lagged... Seriously, my N7 cannot handle LL at all... Even KK is a pain. CM 10.2.1 still going strong though, no lag whatsoever...
[Nexus 7 Q&A, Help & Troubleshooting] Harpratap:
Can you guys elaborate more on your setup? I ditched lollipop for its poor battery life. Gave me just 4hrs SOT even on the best ROM+Kernel combination possible. I just want long battery life, don't care much about performance.

M-kernel for jellybean is no longer available, links are down. Any other kenel for cm10.2? And what's your average SOT on JB?
[Nexus 7 Q&A, Help & Troubleshooting] gunnerhk:
Honestly never measured SOT. Stock CM10.2.1. I recharge all the time so battery is not an issue for me, and custom kernel has been more trouble than its worth.

I really wanted lollipop to work but the lag kicks in no matter what I do.
[Nexus 7 Q&A, Help & Troubleshooting] gsmyth:
Can you link to the build you're running? Might add it on multirom for some testing.
[Nexus 7 Q&A, Help & Troubleshooting] acc3d:
Yeah I'm curious what combination of CM build and kernel will help my 2012 32GB model. It hits the dreaded eMMC stall all the time (even though I have fstrim scheduled daily), rendering it useless for 30 seconds at a time. I would actually trade Android 5.xx features to get the thing not to stall.
[Nexus 7 Q&A, Help & Troubleshooting] gunnerhk:
I got cm10.2.1 from

http://download.cyanogenmod.org/?device=grouper&type=stable

I also run trimmer app daily, and reboot quite often (since my kids run out the battery)
[Nexus 7 Q&A, Help & Troubleshooting] combat goofwing:
Do Google ever plan to fix this lag problem,basically its destroyed a great tablet
[Nexus 7 Q&A, Help & Troubleshooting] Electry:
The tablet is 3y old which means that Google no longer provides support. You may already know that Android M won't be available for our Nexus 7 (officialy), as they (and everybody else) are pushing us to buy newer devices every year.

If you are unsatisfied with the performance, rather than whining about it, downgrade to older version of android, Kitkat, or even Jelly Bean. I personally don't have any issue with Lollipop 5.1, but I like the interface of Kitkat more.
[Nexus 7 Q&A, Help & Troubleshooting] tronmech:
I dropped back to 4.4 after a while because on 5.1 defenestration was becoming a serious option.

I don't think that any 1gb device handles LaggyPop very well. My Moto G2 handles it better, but not always "well."
[Nexus 7 Q&A, Help & Troubleshooting] seanp25:
Does f2fs fix any of these problems?
[Nexus 7 Q&A, Help & Troubleshooting] gunnerhk:
no. I wish it did but no.
[Nexus 7 Q&A, Help & Troubleshooting] Electry:
It definitely helped in long term, but it doesn't have as much impact as one might think. I still suggest you give it a try though :)
[Nexus 7 Q&A, Help & Troubleshooting] kernald:
Actualy the grouper tree was updated recently. They might release M for the Nexus 7 2012.
[Nexus 7 Q&A, Help & Troubleshooting] Electry:
Let's hope for the best :fingers-crossed:
[Nexus 7 Q&A, Help & Troubleshooting] motorazrv3:
Nexus 4, Nexus 7 2012 and Nexus 10 won't get Android M anymore.
[Nexus 7 Q&A, Help & Troubleshooting] kernald:
What makes you tell that? The only official hint I heard about is the M source tree: https://android.googlesource.com/device/asus/grouper/+log/master - which has been upgraded (see tag android-m-preview). I'm not affirmative M will be released on the Nexus 7, I'm just curious what makes you affirm the opposite.
[Nexus 7 Q&A, Help & Troubleshooting] motorazrv3:
That's what I red on some German tech news sites.

They wrote that Googles Dave Burke confirmed on Google IO Conference that they won't get Android M developer preview or final android m.
[Nexus 7 Q&A, Help & Troubleshooting] kernald:
Okay. Seems logical for the M preview, as the Nexus 7 didn't have the L preview neither. It makes sense as the tree as not been upgraded since the I/O. Well, wait & see.
[Nexus 7 Q&A, Help & Troubleshooting] motorazrv3:
Let's wait and see what we will get.

Maybe Google can surprise their 'old' nexus users.
[Nexus 7 Q&A, Help & Troubleshooting] [1]:
spent the past few days trying 4-5 LP roms. all slowed to a crawl after installing a few apps. back to 4.4.4 slimkat so i have a usable tablet.
[Nexus 7 Q&A, Help & Troubleshooting] motorazrv3:
Can confirm. Stock 5.1 was a pain on my grouper. I remembered purity rom on my galaxy nexus and I found purity for grouper. I downloaded latest 4.4.4 and finally the tablet is usable again.
[Nexus 7 Q&A, Help & Troubleshooting] JustinSB:
I finally gave up the unequal Lollipop struggle, as having to repeatedly factory reset and/or flash and still having an unusable tablet for nearly the past year finally got to me. Happy days again, as I reverted to Stock 4.4.4, installed DisableService, opened it up & clicked on Google Play services, scrolled down & then disabled SystemUpdateService. That stopped it from downloading & automatically updating to Lollipop via the OTA, but still left the Play Store capable of updating apps. That's me done with Lollipop on this tablet, as every version of it has been unusable. I'm stopping with 4.4.4. Funnily enough though, Lollipop's really good on my HTC-M8 phone, & every other modern bit of kit that I've seen it running on - So I think that Google were just a little over optimistic when they thought that the old Nexus 7 tablets could run it. Sad, but true...

I just wish that I'd known before I "upgraded" how much of my time it would have wasted, so I could have avoided it like the plague... Hindsight...
[Nexus 7 Q&A, Help & Troubleshooting] kuladiamond:
Hi guys, I'm also having issues regarding performance on Lollipop. I'm currently running Chroma. If I am to revert back to KitKat, which ROM do you guys recommend with emphasis in performance and battery life?
[Nexus 7 Q&A, Help & Troubleshooting] JerryPi:
Hey, i as many others gave lollipop a fair chance. I used all the versions from stock 5.0 to the latest 5.1.1 and also some custom roms with custom kernels and f2fs file system. My conclusion is that lollipop with my usage scenario just gets laggy especially on multitasking and you have to tweak it more to get it to an acceptable performance. Two months ago i "downgraded" back to kitkat to see if i can get my n7 back to speed. The rom i use is rastakat in allf2fs configuration, and a custom kernel from metallice. The device is now as speedy as i remember it was before lollipop, i can properly multitask, and the speed of opening apss is on pair with my n5 [emoji41]
[Nexus 7 Q&A, Help & Troubleshooting] RedsFan75:
Just rolled back to the latest SlimKat, 8.4.4 I think, and my tablet is back the great tablet it was when I got it.
[Nexus 7 Q&A, Help & Troubleshooting] tronmech:
I went back to the stock KitKat rom. Now if only I can get my Moto G2 back to KitKat... (Warranty still valid... And need stock images before I do anything drastic.)
[Nexus 7 Q&A, Help & Troubleshooting] ChungHung.Chen:
Hi, could I ask which version do you get? Snapshot or nightly? I'm looking for latest 4.4.4 "nightly" of grouper but download link is out from CM's download page.
[Nexus 7 Q&A, Help & Troubleshooting] motorazrv3:
Hi.

Purity Rom hasn't got a snapshot or nightly. You are talking about cyanogen roms.

You can find Purity Rom only on Google+. Just search and you will find all you need to know.
[Nexus 7 Q&A, Help & Troubleshooting] FormerSlacker:
So with this Stage Freight exploit I've tried to go on stock and CM 5.1.1 with f2fs to see if it can work, but damn if it doesn't freeze every 20 minutes for like 1 minute at a time, still completely unusable on Lollipop.... this is after its been on 4.2.2 for like a year with zero issues.

So, question, is there a early JB rom with the Stage Fright patches, and if not can anybody point me to them (the patches to stage fright) as of right now the only option is to apply/backport the patches and compile 4.2.2 myself... or is some angel out there maintaining a 4.2.2 rom?

Kitkat was okay on mine, but early JB builds run better. Hell I'd run 4.1 if I didn't need multiuser, because that build just screams.
[Nexus 7 Q&A, Help & Troubleshooting] motorazrv3:
I don't know which rom you prefer and if it must be a 4.2.2 android rom.

I had similar experience with Android 5.1 like you.

Referring to the stage fright I read a statement from cyanogen that all cm 12 and 12.1 version already have the patch applied. And they said on that all version of cm 11 will get the patch too.

So if cm is an option you should give it a try.
[Nexus 7 Q&A, Help & Troubleshooting] FormerSlacker:
Interesting, thanks for the reply.

Yeah I tried CM 12.1 and it was just as bad as stock.

Are there patched builds of CM 10/11 somewhere for grouper? On CM's page they all seem really old.
[Nexus 7 Q&A, Help & Troubleshooting] gunnerhk:
I thought stagefright exploit attacks via MMS. My nexus 7 can't receive MMSs.

I'm running CM10.2.1 with M-Kernel a63.1 and I think I have found my promised land....
[Nexus 7 Q&A, Help & Troubleshooting] AndDiSa:
Drive by stagefright attacks are possible, too :(

I am currently also looking for an updated ROM, best would be stock with the stagefright patches applied to it. Otherwise CM / Omni / ...
[Nexus 7 Q&A, Help & Troubleshooting] GtrCraft:
Chroma rom has it ;)
[Nexus 7 Q&A, Help & Troubleshooting] FormerSlacker:
Well, I've never tinkered with AOSP before, but I've manged to backport CM's patches by jdrake to AOSP 4.2.2 and it seems to have worked, so I'm happy.
[Nexus 7 Q&A, Help & Troubleshooting] weput:
I'm running cm12.1 nightly and it runs fine.

F2fs

Nano gapps

And limited the background proceeses to 4 did the trick.

I'm looking for a fast charge overclockable kernel without luck.
[Nexus 7 Q&A, Help & Troubleshooting] Scirwode:
Went to the Chroma thread to download it but the link is offline. Are you still supporting it?

Scirwode
[Nexus 7 Q&A, Help & Troubleshooting] GtrCraft:
Yes, the dev had nightlies the last couple days. So I delete the last 2 builds and just uploaded the latest build ;)
[Nexus 7 Q&A, Help & Troubleshooting] Scirwode:
Oh, just noticed it was available. But then only for Grouper, not for Tilapia. Is Tilapia supported? I have both tablets but thinking of letting go my grouper to my fiance :) .

Scirwode
[Nexus 7 Q&A, Help & Troubleshooting] GtrCraft:
I didn't get it to work, you can flash a grouper recovery and use the tablet without 3g but no Tilapia support
[Nexus 7 Q&A, Help & Troubleshooting] combat goofwing:
Can we expect any further releases from google to improve the N7 performance that they destroyed
[Nexus 7 Q&A, Help & Troubleshooting] fr4nk1yn:
I've played with lollipop before but it made the tablet absolutely useless.

I'm setting it up to use as a car-tablet and the only way to get lollipop working OK is to strip every Google app and service possible out. Chrome being the biggest problem. Also Google Play services wakelock is insane!
[Nexus 7 Q&A, Help & Troubleshooting] dtg7:
Try switching launchers

This has probably been mentioned already, but if you're having major lag try switching to a different launcher.

my anecdote: I've had N7 since early Jelly Bean and pretty much never done a FDR. Right after 5.1.1 I came here to laud the renewed usability of my N7. But soon I noticed that while there were more periods of fluid performance, the stutters and lags would creep in occasionally. I noticed that these seemed to be most noticeable when going back to home screen, but once it lagged there, the problem seemed to carry over to pretty much everywhere.

now I've been with Apex since I got the N7 and I don't really care to fix stuff that isn't broken, so I'd kept it on Lollipop too. But now I finally gave up on it and switched to the other famed launcher, Nova. The difference in performance was undeniable. the stutters and lags have become much much less frequent. to make sure it wasn't all the widgets and stuff I'd loaded Apex with over time that were bogging it down, I migrated everything on to Nova. performance was still stellar. I've been using it for a few days now without a restart, and its held up.

like I said this is just an anecdote and ymmv, but it's worth a try.
[Nexus 7 Q&A, Help & Troubleshooting] Elcs:
I dusted off my 2013 N7 lately and OTA'ed straight to Lollipop and having an SGS3 previously and now a Note 3 I just whacked on all of my important apps including Nova Launcher.

Other than some games running a bit slower than on my Note 3 I haven't noticed any real speed issues or lag.

Looking for possibly a custom kernel next but that might be a step too far... at least something to boost loading speeds of certain games would be nice.
[Nexus 7 Q&A, Help & Troubleshooting] Bert98:
Yeah but this is the 2012 N7 forum ????
[Nexus 7 Q&A, Help & Troubleshooting] Elcs:
It is? The forum shows as Nexus 7 -> Nexus 7 General. There's no mention of being 2012 only.
[Nexus 7 Q&A, Help & Troubleshooting] Bert98:
The 2013 version has a separate forum, it's called Nexus 7 (2013) :)
[Nexus 7 Q&A, Help & Troubleshooting] Elcs:
Well that isn't confusing at all when you come in from Google.

I shall leave you guys in 2012 and head into 2013 :)
[Nexus 7 Q&A, Help & Troubleshooting] :
I'm curious, how do you manage that the limitation of background processes to 4 (setting in development section, I guess) stick while the next restart?
[Nexus 7 Q&A, Help & Troubleshooting] frankusb:
What worked for me is TWRP 2.8.7.0, format data and cache with f2fs, CM 12.1 20150901 snapshot, GApps Nano and the most important, Trimmer (fstrim) set to run twice a day. Unfortunately this requires rooting, but I tried without fstrim and it was not very usable.