yashsingh1/xdaforums huggingface dataset:
[Nexus 9 General] toopy:
Just an FYI for all,

I have successfully returned my N9 to Amazon, - the restock fee of 20%. Owned the tab for 5thms.

held out as long as I could and so wanted the N9 to be great but after the 5.1.1 and the reeboots was fed up.

Have moved on to the surface 3 an very happy, it even runs HL2 and Starcraft 2 well.
[Nexus 9 General] Chyeo1979:
Just got a LG G4, and i felt sad that my Nexus 9 is how it is when i compared their performance. Maybe google should just leave Android devices to the respective manufacturers.
[Nexus 9 General] octagonPerfectionist:
tbh they are totally capable of releasing great devices in the nexus line, it just seems the nexus 9 (and also the nexus 6 it seems...) was kind of a bust. a shame really, since i really love the hardware aside from all of its crippling issues. would be nice to have a nicer screen and buttons that aren't always defective though. and like, software that actually works. there's always that. sigh.
[Nexus 9 General] borchgrevink:
I have to second this. Had almost given up on the tablet, but for me a complete clean install has made this tablet really nice. Only a couple of redraws. Running 70 hours without reboot now.

I have been cautious when installing apps though. Only the very important, for me, first. And, then one app at a time to see if there is one app in particular causing problems. But, as of now, very satisfied.
[Nexus 9 General] rolldroids:
I opened a new issue as this not seems to be the known memory leak

https://code.google.com/p/android/issues/detail?id=175232&colspec=ID Type Status Owner Summary Stars
[Nexus 9 General] Chyeo1979:
I can forgive the external hardware portion since google do not make the devices themselves, but it's a shame that they can't even get the software right when they are supposed to be the brain of Android.
[Nexus 9 General] octagonPerfectionist:
yeah it's true, i just don't understand how it went so bad. honestly i'm wondering if it's just because the 64-bit nvidia k1 is just a dud. their denver architecture may just not be all that we hoped it would be.
[Nexus 9 General] jjs4653:
Rebooting

My nexus has never rebooted until today --a few days after 5.1.1 using chrome.. no other apps open. Has done this twice

Any suggestions?
[Nexus 9 General] rolldroids:
But on 5.0 my nexus 9 has been really fast.
[Nexus 9 General] octagonPerfectionist:
try a factory reset, or unlock the bootloader and reflash everything. actually i'd highly recommend just unlocking the bootloader so you don't have to worry about bricking the device in the future. this will however erase all of your apps and data but if you ask me, it's worth it.
[Nexus 9 General] garyhoggatt:
After more than a week and multiple attempts to update, I still can't get from 5.0.2 to 5.1.1 with the OTA, since I keep getting the Dead Android on the reboot, and end up back at 5.0.2. Is there any solution out there that won't wipe my N9?

This is such a pain in the ass. I'm not rooted or anything, there should be no reason an OTA on a Nexus device consistently fails to work.
[Nexus 9 General] octagonPerfectionist:
if you're really having that much trouble with the OTA and you really are following all of the required steps, you should probably just give up on that and flash the factory image. i would be worried about corrupting data and bricking the device since the bootloader is locked and you're having so much trouble with this. if you unlock the bootloader your chances of actually truly bricking the device are practically nil. having to back up all of your data really kind of sucks but google's backup will install all of your apps automatically and restore your home screens if you're using the google now launcher (and most good launchers let you back them up too). you will not however be able to retain any data within the apps, which is a shame.
[Nexus 9 General] foxmeister:
Google do however specify the hardware for Nexus devices.

This means that the choice of SoC and the 2gb memory were at Google's discretion, so if the problems do stem for this it most certainly is Google's fault.

Regards,

Dave
[Nexus 9 General] Chyeo1979:
True also. If my Nexus 9 can be as lag free as my G4, I'll be damn happy.
[Nexus 9 General] Marcoaerometric:
Hi guys , after the update ( 5.1.1 ) i have a lot of problems : sometimes the rotation gone wrong , a little noise like a bip during the videos , random restarts , chrome freezing a lot with video's issues , several crashes...

Before i had none of these problems except a little 'slow...

Anyone with these issues?
[Nexus 9 General] Ace42:
Can you describe the audio sound it makes, because that's similar to what I experienced whenever audio played on mine. Is it like a screeching sound or something?

"I'd Totally Hug You, If That Was Something I Did"
[Nexus 9 General] Marcoaerometric:
Like a low volume electrical buzz and sometimes a 'bop'.
[Nexus 9 General] Ace42:
I think that's it, it was a sound I never heard from any device before. After flashing multiple roms and returning to stock the buzzing continued, so I concluded it was a hardware defect with mine.

"I'd Totally Hug You, If That Was Something I Did"
[Nexus 9 General] 530farm:
That was a common problem on my opo. Mainly related to too low of a cpu freq
[Nexus 9 General] Hiro Nakamura:
I do pick up noise with my in ears as well when sound is played. How did you solve the Problem exactly?
[Nexus 9 General] chrmica:
I have been using 5.1.1 and its still a mess on the nexus 9 the memory state when checking process stats is nearly always moderate or low and when running chrome and video from chrome memory goes to critical very quickly and chrome freezes it even crashes and reboots Android, in comparison my nexus 5 on 5.1.1 memory status is nearly always normal and everything is just smooth and both devices have basically same apps installed, so hope Google can fix the issues with the 5.1.1 64bit for nexus 9.
[Nexus 9 General] rolldroids:
I have been in the shop again, where I had updated the n9 to 5.1.1 last time. It runs pretty well on 5.1.1. I used chrome, earth, slides, camera and some other apps I do not remember. I cant watch memory stats because it is in a locked demo mode or something, but everything works fine on this device. It is responsive and has no lags or redraws at all. So what does this tell to us? Is it device related? Or installed apps?
[Nexus 9 General] marctronixx:
Same experience as you have on the nexus 9. I'm stock not rooted lte version. I see no improvements in 5.1.1 over the previous build.

Nexus 6 runs buttery smooth on 5.1.1.....
[Nexus 9 General] madsquabbles:
just made the jump today and i've gotta say the experience so far has been pleasing. i'm coming from AICP with fire ice kernel and was pretty happy overall with it... just the normal complaints with the nex 9 - stuttering in chrome, refreshing every time a tab was switched, etc.

now i'm stock rooted on 5.1.1 and pretty much impressed. i've only tested it for a few hours, but the chrome refreshing is mostly gone. i've only tested with four open tabs, but even when leaving chrome to do a restore in titanium the tabs didn't reload. i didn't experience a single stutter in chrome either. i can't say whether this is all 5.1 related or due to the chrome update that i took today. either way it's very impressive. even the homescreen seems to not redraw like it used to.

another big thing is the governor has been tweaked. when you touch it now it only goes to 1520 cpu and ~600gpu where on 5.0 it would ramp up full speed on both on any contact with the screen.

so, i'm please with the tablet so far and it's kept me from getting a new tablet this weekend ($199 gtp 8.4 is pretty attractive, i missed a few times already).

one thing that does piss me off is not rom related, but frigging google music. i've updated two tablets this week the same way i've always updated my tablets & phones to make sure the don't count as another device and dammit if i don't have two "new" devices listed now. i'm at 7 out of 10 with no deactivations left.

i've always backed up setting storage and google music. then restore android id after flashing, reboot, reinstall google music with data and have had no problems with the previous 4 flashes of my devices. the last two screwed up. i don't know if it's my error or if google is now using another method to block us that are restoring google id's. i even check the models are the same and edit if needed - i'v switched rom versions previously without any problems either. the last two flashes just didn't work with google music. looks like if i'm stuck with 10 device with no way to deactivate i'll be switching to some other service as a back up and give google a few months more to sort it out - it's hard to drop the $7.99 price i got locked in to.
[Nexus 9 General] madsquabbles:
started getting the chrome stutters today. gonna clear Chrome's cache and see if it fixes it.
[Nexus 9 General] zaydaboss:
Wish I had some feedback on the experience of 5.1.1 too bad my screen turns off every millisecond after updating.
[Nexus 9 General] i9100g user:
Just a FYI viper4android is now working fine on 5.1

http://xdaforums.com/showthread.php?t=2973260
[Nexus 9 General] rmagruder:
Regardless of whether on 5.1.1, M preview or M preview 2, the nexus 9 still likes to go unresponsive for seconds at a time. Is this something a kernel can fix? I don't understand why the nexus 9 cannot seem to continuously responsive. My nexus 6 gets grabbed when I don't want to run into these issues because it doesn't have them, is this just a Tegra K1 failure? Or just a kernel that doesn't work that we'll from Google?
[Nexus 9 General] jami1:
Is open GL 4.5 in it?
[Nexus 9 General] jsr84:
Sideload went well, no huge impressions so far but I haven't had a chance to play around too much. One thing I did notice is that 5.1.1 didn't fix the flimsy back panel... damn.

That was a a joke.
[Nexus 9 General] darkchazz:
Nexus 9 always had both cores always on. No change there.

Max frequency hasn't changed btw, at 2.3ghz.
[Nexus 9 General] jarjar124:
I don't know, but for some reason the volume seems to be lower. Is it just me lol?
[Nexus 9 General] stadicon:
No. OpenGL ES 3.1. Sorry, bro...
[Nexus 9 General] zera89:
Hi, I saw a ota link in op. What's it?

My nexus is locked. Can i install ota with it even if I'm locked?
[Nexus 9 General] mikebeatrice:
I'm just glad this is finally available because now CM12.1 should start rolling out soon.
[Nexus 9 General] tom1807:
Thanks for that, just installed manually the image, went to Developer Options and the OEM unlocking was also disabled.

Enabled again
[Nexus 9 General] cam30era:
Yes, but it's probably a good idea to unlock boot loader in case something goes wrong. Unless you have security concerns....
[Nexus 9 General] doitright:
There are no security concerns introduced by unlocking the bootloader that are not already present in a device with a locked bootloader. Specifically, the theory is that keeping the bootloader locked will prevent unauthorized modification of the contents of the system partition, HOWEVER, if the device ever leaves your control, you have to assume that the system partition could be modified DESPITE the state of the bootloader lock. There are ways (I know them, but will not state them for obvious reasons) to unlock and relock the bootloader withOUT wiping the userdata partition.
[Nexus 9 General] bjacks12:
After seeing so many people have their devices bricked by 5.0.2, I decided to unlock my bootloader. It's worth the data wipe(and if you're using your device right, it shouldn't be a problem). No Nexus device of mine will ever have a locked bootloader again.
[Nexus 9 General] Dunka:
Successfully side loaded the OTA. Feels a little bit more zippier although I haven't had or experienced some of the problems others have been reporting with their tablets. Still early but so far so good.
[Nexus 9 General] Philaphlous:
No issue what so ever flashing the factory image for 5.1.1 from 5.0.2. Tablet definitely seems smooth. I got google octane upto 9900 score which is highest I've seen... Even for a stock tablet!
[Nexus 9 General] matt30:
It's much harder to preserve personal data on a device with a locked bootloader and encrypted data partition. As of today there are no publicly released root or privilege escalation vulnerabilities on 5.1 (which admittedly hasn't been out very long) .
[Nexus 9 General] Philaphlous:
Woah! Chrome is back in my book. First time ever breaking 10k with octane. Dang! Pure stock on my 5.1.1 n9
[Nexus 9 General] inick73376:
I need 5.1.1 on m N9 LTE.
[Nexus 9 General] paxderomano:
5.1.1 bricked my N9

I know people were having issues with 5.0.2 doing this, but it worked wonderfully on my N9. Downloaded the OTA 5.1.1 and it installed and froze on Google upon reboot. Since then, I've been able to boot into the bootloader, but I tried to run recovery and just get the android laying on its back with the red triangle and !.

Does anyone have a suggestion on how I can fix this that does NOT involve a complete factory restore? I had decided not to root this tablet and so I don't have a backup. It's not the end of the world, I would just lose some save game info and naturally would prefer not to do that.

Any help would be appreciated!!! :D
[Nexus 9 General] nolook:
seems much faster and the double tap wake seems more reliable... hope it's not a placebo...

Sent from my Nexus 9
[Nexus 9 General] creepinchi:
Was able to get root working
[Nexus 9 General] dictionary:
Experiencing the same, and I've been on all custom Roms, kernels, stock Roms, etc, with full wipes. In my eyes not placebo, but time will tell
[Nexus 9 General] juanxosam:
It has improved but it stills slow to my eyes considering what it is supposed to be.

There's still a lot of room for improvement. My oneplus one, is a thousand steps ahead in terms of overall speed and multitasking, there's something wrong with this tablet.

Although we can now have more than tab opened in chrome (YAY?) it keeps restarting as hell when multitasking between 3 apps. (although it loads faster than it used to).
[Nexus 9 General] ChristianJay:
Battery life is markedly improved is the main thing that I have noticed. Seems a bit snappier as well.
[Nexus 9 General] JackHanAnLG:
When it says no command hold down the power button and press the volume up once
[Nexus 9 General] rockingpiyush13:
Maybe you could try booting TWRP through fastboot and try wiping cache and dalvik cache using TWRP.
[Nexus 9 General] ChristianJay:
No more force closing of apps as well.
[Nexus 9 General] juanxosam:
launcher redraws still there. Sigh.
[Nexus 9 General] zera89:
So... Can i install ota with link in op and my nexus locked?

If Yes, can you explain how?
[Nexus 9 General] shojus:
You guys may want to tell Google cause we have no control over that and so far I have seen 2 trillion comments about the LTE model not getting the update too. If you look at the past, you would realize that it typically does not come out with the wifi variant. Sorry! Don't know what else to say... Hell, I didn't realize just how many LTE Nexus 9's sold until I have seen all of the posts in the last 24 hours. :eek:
[Nexus 9 General] inick73376:
I wasn't expecting on buying the N9 LTE until I saw T-Mobile actually carrying it. lol So hopefully 5.1.1 rolls out soon for us LTE Owners.
[Nexus 9 General] Philaphlous:
Is this source using a new kernel? I can't tell but I think we're still on the original
[Nexus 9 General] maarten08:
Kernel build 9 Apr, so should be a new one I guess
[Nexus 9 General] Nikki1993:
So far so good!

My impressions are mostly positive.

The good

Performance definitely improved. Recent apps now open without noticeable delay. Improved performance in games, such as Hearthstone, not so many freezes anymore here and there. Feels a bit snappier in general. Updating apps through Google Play Store doesn't seem to hang the device that much anymore. It's still laggy when you install apps and try to scroll browsing window for example, but overall it's much better than it was before.

The bad

Google Now seems to be not working properly still. Despite checking options under Google -> Settings -> Voice -> "Ok Google" detection -> Always On and Personal Results, Google now refuses to activate when saying "Ok Google" on lock screen or any other app other than the home screen. Seems to be the problem for some people, according to Google Forums, I was hoping that would be out of the way but no...

So far, Google Now is the only downside that I've encountered (knock on wood). If anyone knows a solution to this particular problem would be nice to hear it :) otherwise, everything seems to be fine and I am glad Google finally released it. People can say all they want, but an excuse that Nexus 9 uses different hardware is not a proper apology for late updates. Consumers do not care about hardware reasons :) Hopefully we won't have to wait 2 month for Android M on Nexus 9.
[Nexus 9 General] lept_2014:
I have used Firefox for 10 minutes to check the Forum, and the Tablet has been warmed too much. :confused:
[Nexus 9 General] hdtvpower:
Had the same issue, after checking had to realise that while updating to 5.0.2 I had lost my front micro. N9 has two micros, front did not work anymore and all sound levels were to low to activate GNow. Could not fix --> RMA
[Nexus 9 General] Nikki1993:
How did you check the mic? The best part is that if I disable and enable said options, it works for couple of hours, then stops. Something that made me think that it is not a hardware issue, as I've RMAed one tablet already and that one had the same thing.
[Nexus 9 General] cam30era:
That page is stock recovery.

I think you're not going to get your device to boot without doing a complete wipe.

I suggest boot to bootloader, then:

"Fastboot format cache"

"Fastboot format userdata"

Note that the second command will also wipe the contents of your SDcard.
[Nexus 9 General] hdtvpower:
Sometimes it worked for a few minutes and than it stopped. I used an app audio recorder and just recorded. When it was broken the volume was extremely low and I had to almost bite into the N9 to get GNow working.
[Nexus 9 General] Nikki1993:
Seems to be not the case for me as I've just tried a recording and I can hear myself just fine. I don't need to "byte" my nexus 9 to record something. So my mic, I assume, is fine.
[Nexus 9 General] AhsanU:
I don't know if I'm going insane, but there appears to be no option to enable battery percentage? I haven't been on stock software in a while (been running CM/custom ROM's on all my Nexus devices) but I thought you could enable that.

I also get some weird error after restarting that says "Android System: There's an internal problem with your device. Contact your manufacturer for details". I'm coming from CM12.. so weird.
[Nexus 9 General] cam30era:
1st, you're not crazy. % option doesn't exist on stock.

2nd, did you flash the vendor.IMG? With Android 5.1, Google added a "consistency check" to ensure you use the correct vendor image. This zip will modify the vendor build.prop to match the system build.prop. If you do not flash this, you will see this dialog every time you start up your device > "There's an internal problem with your device. Contact your manufacturer for details.".
[Nexus 9 General] AhsanU:
I flashed every .img in the zip folder, which is strange. I came across no errors while flashing through adb, the command I used was "fastboot flash userdata vendor.img", should I have replaced userdata with vendor? Either way, it doesn't annoy me much since I don't restart my tablets often.
[Nexus 9 General] androidtoy09:
adb shell content insert --uri content://settings/system --bind name:s:status_bar_show_battery_percent --bind value:i:1

You're welcome
[Nexus 9 General] fblasot:
I know that I can use the modified boot but someone knows if flashing the image 5.1.1 (or after ota, reset the N9 to default) it is possible during the first setup disable the encryption ?

I read that google with 5.1 decided to enable this option for non powerfull devices...
[Nexus 9 General] stuken:
CPU scaling appears to be almost unchanged from 5.0.1. It's still throttling up to 1.5ghz on a touch input and staying there even if CPU load is negligible.

It is still running as hot as 5.0.1 on load which is expected given the above.

RAM usage is still reading critical with the same frequency as it did on 5.0.1.

Chrome is crashing the whole OS in a 100% repeatable manner.
[Nexus 9 General] reggie14:
Hmmm, I was coming on here to say exactly the opposite. 'OK Google' detection never worked for me under 5.0.1 or 5.0.2 when the screen was off. Well, sometimes it would work for the first 5 minutes after a reboot, but then it didn't work. For me, this issue appears resolved, although I've done limited testing thus far.

One weird problem, though, was that it took a couple tries to get the setting to stick. Enabling Always On and Personal Results didn't stick on my first few attempts.

Overall, 5.1.1 does appear snappier. Some of it is real, but I'm sure some of it is placebo and tricks. I'm pretty sure Google changed some of the animation settings to make things "feel" more responsive. Redraws/reloads continue to be a problem in the home screen and Chrome, although it doesn't seem quite as bad. This might be as good as its going to get- Google and HTC really should have gone with 3GB of RAM in this thing.
[Nexus 9 General] workdowg:
This is all I did coming from stock/rooted 5.0.2...

1)

***IMPORTANT*** Make sure in Developer settings:

Enable ADB Debugging

Enable OEM Unlock

2) Download factory image to pc:

Unzip volantis-lmy47x-factory-3efdc8d4.tgz

Unzip image-volantis-lmy47x.zip

3) Boot into TWRP

4) TWRP Recovery:

Wipe data,cache,dalvik, system

Reboot>bootloader

5) Bootloader:

fastboot flash bootloader bootloader-flounder-3.44.1.0123.img

fastboot flash system system.img

fastboot flash boot boot.img

fastboot flash vendor vendor.img

***IMPORTANT*** Select Hboot>>recovery

6) TWRP Recovery:

Flash supersu or CF-root (It failed for me, but TWRP asked to install SuperSu on exit anyway)

7) Profit
[Nexus 9 General] Nikki1993:
Do let me know if eventually it will stop working or not for you.
[Nexus 9 General] cam30era:
Wrong command. That's why you're getting the error message. Should be " fastboot flash vendor vendor.IMG".

---------- Post added at 10:43 AM ---------- Previous post was at 10:37 AM ----------

There is an unencrypted boot.img in the Development section. Flash that via fastboot when flashing the rest of the .img files from the factory image. However, in order to be unencrypted, you have to "fastboot format user data", which will wipe the contents of your SDcard.
[Nexus 9 General] _litz:
re: flashing supersu in TWRP, make sure you are using supersu 2.46 zip

re: flashing vendor ... fastboot flash needs to match the image name ...

system.img : fastboot flash system system.img

boot.img : fastboot flash boot boot.img

etc.

userdata = YOUR data ... this is not the same thing as "vendor" ...
[Nexus 9 General] Dr. Hurt:
Haven't spent much time with the update, but here are my findings so far:

NAND write speeds are MASSIVELY improved (4-5x faster) in both random and sequential.

Available RAM in settings is about 800MB (was 1GB before update).

Tabs reload much less often. Finally chrome is usable.

Animations are smoother

Adaptive brightness is smoother

Tablet still heats up. CPU scaling is the same.

HEVC h.265 videos are still broken.

No more android system in task switcher.

Can't wait to see how battery life has changed.
[Nexus 9 General] NJ_RAMS_FAN:
anybody getting a quick white line flash on the left side of the screen? it happens when switching from apps or turning the tablet one from sleep. it wasn't happening with 5.0. it's rare but it does happened.. like a video display glitch.
[Nexus 9 General] Metallice:
Surprising. Mine runs much cooler while charging and playing heavy games (only time I could really get it hot before)

Kernel sources show a new adaptive thermal "skin" governor. Whatever that means. Thermals now take CPU and GPU temperature into account. I guess they didn't before for some reason :/