yashsingh1/xdaforums huggingface dataset:
[Nexus 9 General] techiedj:
*WARNING* RE-enable OEM Bootloader Unlocking after Update!!!

Just a heads up and

REMINDER to go into Developer Options and turn OEM Unlocking back on after the OTA update

because it had turned mine back off after sideloading. :eek:
[Nexus 9 General] bjacks12:
I wish I had my laptop set up so I could remote in from work right now and begin downloading the image. :(
[Nexus 9 General] Rox598:
I take it Root is still working?
[Nexus 9 General] metaphz:
I've been thinking off using one of my phones as a hotspot for my laptop...Just not thinking it will be quite fast enough and stable enough to download and get a good MD5. My company watches everything.
[Nexus 9 General] doitright:
Why not just get it over with and UNLOCK it? Once you are unlocked, the state of that checkbox is irrelevant.
[Nexus 9 General] s0101:
Why is that important? Will I brick my device if I don't? Please explain for an absolute newbie!

Thank you!!!
[Nexus 9 General] metaphz:
If you don't unlock, and leave your bootloader unlocked it can. If you have the check box checked then the bootloader remains locked. So if you get caught with a bad flash or anything else that causes a bootloop there is no way to gain access to the bootloader and run fastboot.
[Nexus 9 General] stuken:
Not off to a great start. I've had my 3rd crash triggered simply by browsing to the reddit nexus 9 board. Now it appears to be on a forced cache erase after the consecutive crashes.

From this we can safely say nobody in Google pays any attention the forum moaning otherwise they might have noticed this issue.
[Nexus 9 General] irotsoma:
Anyone get an OTA for the LTE version yet? They haven't posted the factory images which scares me a little that LTE might get left behind. The 5.0.2 links went up for both at the same time.
[Nexus 9 General] Fadakar:
Mine's still running really warm and it's losing power over USB just by being on. I'm watching the battery drain simply from the screen idling on Google Now. Come the **** on Google, heat and battery drain should have been primary concerns.

Edit: Fortunately though, it seems like the entire device is running buttery smooth, which is literally a first on stock Android for me. Even my Nexus 6 hiccups without a custom ROM and that has the S805 and 1 more GB of memory.
[Nexus 9 General] atomikpt:
Still no OTA for LTE on 5.01 -> 5.02 ...

What the hell is Google doing... firstly releasing almost beta Lollipop that on our Nexus have serious issues.. after waiting and being the last device to be updated still no upgrade to LTE which is more expensive and deserves at least same support.

If our model is left behind, I will surely not buy a Nexus device ever again.
[Nexus 9 General] SonicJoe:
LTE takes time. I wouldn't worry about it. I bet factory images are up within a day or two. I'm an LTE owner too, so I'm in the same boat. I'm just happy it actually started rolling out, as it started to look like it wasn't happening. This is a much bigger update than 5.0.1 -> 5.0.2
[Nexus 9 General] tzuyang:
Updated this morning. So far so good
[Nexus 9 General] stadicon:
So far, it's definitely an improvement on performance but it remains to be seen with this is another cache-wipe factor or something. One of the first-impression fixes is that the light sensor seems to actually work now, while it was almost useless before.

I noticed the stock kernel is now on 2,5GHz high and that both cores are allways on, which i am not sure if it was happening on 5.0.x. I remember Franco noticing it on Nexus 6 5.1 too, so i guess it's a common practice by google to not turn cores off anymore.
[Nexus 9 General] GibsonSGJ:
Well so far so good. I never had major issues before. OTA side loaded fine. Did a factory reset to set up fresh. Now that everything is set up I'm just waiting for it to charge completely. It did get warm installing and updating everything, but no issues so far. Everything went smoothly.
[Nexus 9 General] Diaphragma:
There's a new apk named 'Who Am I?' That is disabled by default in this update. Turns out it's a widget that literally shows you the time and what your name is. Maybe it's for people with dementia or short term memory.
[Nexus 9 General] bjacks12:
The way things have been going, most of us might have needed that widget by the time this update got to us if we'd waited much longer.
[Nexus 9 General] TheMuffnMan:
Just flashed to 5.1.1 (unlocked + rooted) from 5.0.2 (unlocked + rooted) and followed the below method:

Download 5.0.2 factory image, unpack it

Connect Nexus 9 to your computer, on your computer:

adb reboot bootloader

fastboot flash bootloader bootloader-flounder-3.43.0.0114.img

fastboot reboot-bootloader

fastboot flash system system.img

fastboot flash boot boot.img

fastboot flash recovery recovery.img

fastboot flash cache cache.img

fastboot flash vendor vendor.img

fastboot reboot

(at this point waiting for the app optimization to happen)

flash CF-Root

*edit1*

Spoke too soon it looks like, after flashing the patched/inject stuff for Root it's going into the Optimizing Apps bootloop. Going to see if I can clean it up. Just cleared the cache using fastboot to see if that helps.

*edit2*

Back up and running after reflashing everything (system, flounder, boot, vendor, cache, etc) Going to try to do TWRP and see how that goes!
[Nexus 9 General] syryanyang:
Just updated to 5.1.1 and now I only have 8gb free space out of 11. Is it normal?
[Nexus 9 General] - sYndrome -:
Great, I keep getting random reboots in 5.1.1.
[Nexus 9 General] .vermilion:
My experiences on 5.1.1:

Overall I'm happy with the new update. The tablet is definitely faster now and more reliable. Chrome still has redraws but I haven't got any redraws of the homescreen so far.

Sent from my Nexus 9
[Nexus 9 General] Al-Azraq:
I am starting to be pretty sure that the problem here is Chrome since the other apps work great for me.
[Nexus 9 General] Philaphlous:
Well after having a good deal of time with the update I believe they've made some gpu improvements. In benchmarks I'm about 5c cooler with the same speed and results. Guess they found some way to optimize something...
[Nexus 9 General] itlnstln:
Meh. It's as crappy as it was on 5.0. Plenty of launcher redraws and Chrome tabs reloading. Not a big improvement from my use-case perspective.
[Nexus 9 General] androidtoy09:
Anyone experiencing wifi drop in and out?
[Nexus 9 General] ss12108:
Stupid question that I have tried searching and can't seem to find the answer I'm looking for. I've gone through the process of disabling encryption on my LTE version and want to run the 5.1.1 factory image, but I don't think a no encrypt boot.img is available yet. If I just run the image as is, without wiping data, will the factory image re-encrypt the data or create some sort of issue?

Edit - NVM...looks like that's an obvious "yes".
[Nexus 9 General] adatydoo:
I have not yet updated to 5.1.1, but I noticed that launcher redraws and memory usage decreased noticeably by switching to Nova launcher. Apparently the Google Now launcher has memory issues.
[Nexus 9 General] adatydoo:
I followed your steps and it worked for me. The app optimization happened after the 5.1.1 flashing, then again after the CF-Root. Then I rebooted and it happened again, but much quicker. After the 3rd time optimizing, I rebooted twice without any app optimizations. I'm not sure why it would do that; it was a bit worrying, but seems ok now.
[Nexus 9 General] nullzwo11:
Am I the only one who is positively surprised and happy with 5.1.1 ??

Smoother and faster, no redraws so far. On my Tablet since Factory Image has been released.

Batterylife is okay so far, I used to have another kernel before the update, but now running stock.
[Nexus 9 General] TheEmpyre:
I'm having a similar experience. Far less homre screen redraws and also a noticeable smoother experience. Although I wasn't particularly bothered by the performance in the first place although admittedly a $400 tablet with these specs should be flying.
[Nexus 9 General] LowRG:
Soft bricked?

Installed OTA on a completely stock, non fiddled with, NO. Error midway through installation and now iI get no where past the Google boot screen. Any ideas?
[Nexus 9 General] Dr. Hurt:
Probably file system corruption!! If your tablet is unlocked, flash the factory image. Otherwise, contact Google for an RMA.

This is happening to lots of people as seen on Google's nexus 9 product page.
[Nexus 9 General] GibsonSGJ:
I'm experiencing a very noticeable reduction in heat from the upper right corner while browsing with chrome. I can actually feel that it just gets slightly warm now as oppose to approaching hot with extensive browsing sessions. Battery life has improved as a result. I'm very happy with my N9
[Nexus 9 General] LowRG:
Unfortunately i am locked as from the factory. Guess I'll be sending it away.
[Nexus 9 General] octagonPerfectionist:
try wiping cache with fastboot. install android sdk tools (http://developer.android.com/sdk/index.html scroll down to sdk tools), open a command prompt in platform-tools (copy & paste cmd.exe there) and type fastboot erase cache

if that doesn't do anything then yeah, it's bricked and unfortunately the only thing you can do is send it to google for them to fix it.
[Nexus 9 General] ss12108:
I flashed factory image on my LTE and it seemed to work fine, but something odd happened. Now I'm pretty sure no one has been able to get one to work on Verizon yet, but I've had two of these, and they both recognize a Verizon sim but won't connect. Upgraded to 5.1.1 and now it won't even recognize the sim. Did a full factory reset just to make sure since I'm doing an RMA on my replacement device for terrible light bleed and sunken in buttons anyway, and it still does not recognize the sim anymore.

Just fair warning to anyone who actually does have working LTE.
[Nexus 9 General] Moomoomania:
I finally got the successful 5.1.1 update a couple days ago and to be honest, I'm pretty darn happy with the results. It's MUCH smoother like others have been saying. I really enjoy it; thank goodness for this update :'). Can't wait to see what Android M is in store for us... HOPEFULLY WE WON'T BE LEFT OUT FOR A LONG TIME AGAIN.
[Nexus 9 General] borchgrevink:
Any experience with full clean install versus upgrade? I am not fully pleased with the update, still lag and redraws but better than before.
[Nexus 9 General] Al-Azraq:
That is happening because you have flashed a non-LTE ROM to a LTE device. 5.1.1 is not available for LTE devices at this moment, so if you want to get LTE back just flash 5.0.1 again but this time make sure that is a LTE version of the ROM.
[Nexus 9 General] mrorange2108:
It was released some days ago already for lte!
[Nexus 9 General] ss12108:
I used Wug's toolkit and made sure to confirm on 3 separate attempts that it was the LTE version. If the toolkit were accidentally downloading the WiFi version it probably wouldn't be giving me the "no sim detected" notification.
[Nexus 9 General] Al-Azraq:
I am pretty sure that you missed some confirmation or step because the LTE version of 5.1.1 has not been released so far. What sounds strange to me is that the device let you install this version but maybe you used the force flash option.
[Nexus 9 General] ss12108:
LTE factory image has been available for 3 days. I both auto detected the device in the toolkit twice, and manually selected it once. The factory image which was downloaded also referenced volantisG, which is the LTE version. I also tried on two different PCs. Factory reset twice as well. There's not much else I could have done wrong doing a full, fresh install of a factory image.

Edit: I did use the force flash option but I did confirm the device which was detected and the factory image.
[Nexus 9 General] Al-Azraq:
Yes, you are right. Sorry for the confusion.
[Nexus 9 General] ss12108:
No problem at all...could be isolated to my device (good excuse to get another RMA for the light bleed that was so bad on this first replacement) but figured I'd share the experience.
[Nexus 9 General] Nikolaos_Tsarmpopoulos:
Same for me with Chrome.
[Nexus 9 General] reggie14:
I haven't seen this mentioned yet anywhere else- I'm having trouble with the volume on-screen display. When I use the hardware volume rocker, the volume OSD comes up, but the bar doesn't move when I hit volume up or down. At least the volume changes, but it's still annoying. Does anyone else have this behavior with v5.1.1?
[Nexus 9 General] cam30era:
Volume OSD moves with rocker on mine (5.1.1). Try reflashing system.img.
[Nexus 9 General] reggie14:
Ugh... Since I didn't see anyone else complain I was worried I might be the only one.

I'm not rooted, so my options for backups are limited to adb, which can't get at much. Can I reflash system.img without an unlocked bootloader and without wiping data? I've only done similar things in the past when I've done full wipes.

And to check my understanding, are you suggesting that I download the 5.1.1 factory image, unpack it to grab system.img, and flash it in fastboot?
[Nexus 9 General] cam30era:
Yes, that's what I'm suggesting. And your bootloader has to be unlocked. Unlocking will wipe your SDcard.

You'll have to decide if it's worth it.
[Nexus 9 General] rolldroids:
I have been in a shop and tried the nexus 9 there. It is really responsive and has a great user experience running 5.0 I think I should go back to 5.0
[Nexus 9 General] kdoul:
I get launcher redraws only when using chrome. Also on chrome, I can't keep more than 1 tab open without others refreshing. Even on the LG G3 I get page refreshing with ~3 tabs open and it has 3gb of ram. On the older N7 2012 I can barely open the application without the tablet crashing.

What happened to chrome? Back on 2012 it worked flawlessly on N7 and a ****ty phone I had with 512MB ram.
[Nexus 9 General] cam30era:
If you decide to downgrade, do not downgrade bootloader. If you decide to upgrade again later, it can lead to a brick.
[Nexus 9 General] waiting4mynexus:
Yes, I saw a noticeable increase in performance. I think chrome needs the rewrite we are getting promised with android m.
[Nexus 9 General] rolldroids:
Oh, I am not very familiar with this stuff. I thought that I can just flash the factory image, wait until proplems are solved and then install ota updates.
[Nexus 9 General] cam30era:
No. Download the factory image, extract all of the files. Do not use the flash_all script. Fastboot flash all of the .img files EXCEPT bootloader.img.

Note that your bootloader has to be unlocked.
[Nexus 9 General] rolldroids:
I think I will try to return my n9 and get my money back. ?
[Nexus 9 General] rolldroids:
OK, I made some Videos showing that memory issues are still there.

At first I used my n4 for recording my n9 using Firefox and return to homescreen. As you see it takes many seconds to redraw. Then the memory state is shown. It is low in this moment and critical most of the time. Here is the video:

https://youtu.be/SFvH5zeJXE4

While doing this, I noticed that my n4 had problems too, so then I got my n7 for recording my n4. The YouTube app stopped working (runtime 14 hours, but I already had the issue yesterday) and after rebooting it worked again. System RAM after reboot was about 250 MB, forgot to record that. Here is the video:

https://youtu.be/lnRPxk6oMNA

Additionally, before people say the n9 issue is a Firefox issue, I tried chrome. I had no homescreen redraw, but it was not possible to switch between chrome and slides without reloading:

https://youtu.be/FXxnJMegkew

All in all, I only can say nothing is fixed in 5.1.1 and the devices running it have very poor performance.
[Nexus 9 General] octagonPerfectionist:
haha i've had pretty incredibly bad performance lately. literally being unable to run any two apps at the same time really blows. even the facebook chat heads immediately close after opening. it's always fine when the device first boots but it pretty quickly becomes unusable. the memory issues are clearly still unfixed and at large.
[Nexus 9 General] borchgrevink:
Running the N9 in safe mode now. All seems to work great, no lag to speak of. Have tried to open all Google apps and multitasking like h... Does this actually mean the lag I experience is due to some badly written 3rd party apps or something else?
[Nexus 9 General] cam30era:
Most likely a 3rd party app.
[Nexus 9 General] workdowg:
I would quote more people but this one is enough. I do believe it is a combination of the poorly written apps people are running and possibly not completely wiping the device? I did a complete wipe (running unencrypted) and I have yet to have any really issues. This thing is flying now!

I hardly ever have more than 3 tabs open in Chrome but I've been testing with more and only slightly get a redraw. Mostly it is refreshing the ads on the pages... I did switch to the CM Trebuchet launcher a couple days ago because of the lack of customization of GEL, not for performance.

For what it is worth Antutu: 55,000 - 58,000

Two cents thrown in....
[Nexus 9 General] hdtvpower:
Running 5.0.2 on Galaxy S6 since many hours. Status of memory is always normal. Issue must be in combination with some venor.images.
[Nexus 9 General] rolldroids:
Yes I think it is possible that the issues are from vendor specific code because the devices behave differently. Also the cgroup issue is n9 only afaik.

It should not necessary to wipe anything when the device is stock and offers an update. It is a developer device but that doesnt mean that it is no normal end user device too!
[Nexus 9 General] Rox598:
Google need to fix/explain these issues with the N9 quickly now. The redrawing and constant closing of tabs/apps in the background is shocking it's like it only has 512MB of ram :/
[Nexus 9 General] rolldroids:
True!! But I guess Google wont explain anything [emoji6]

What could makes things worse on n9:

- The CPU uses 128 MB RAM for saving code sequences. Is this additional RAM or taken from main RAM?

- High display resolution could increase RAM usage?

I'm not sure about that, but it could mean that the RAM is just far too small for this device??
[Nexus 9 General] luigig:
Pretty happy with the update

I am pretty happy with the update.

I mostly use my Nexus 9 for browsing and before the update the Screen time was around 5 hours when the battery was 15%

Now with the 5.1.1 update is close to 7 hours!

More details here:

With 5.1.1 (using mostly Firefox with ublock 9.40)

Remaining 15% - approx 11 hrs left

Firefox 22% (CPU total: 1h 58m 58s, CPU foreground: 1h 58m 11s)

Screen 18% (Time on: 6h 45m)

Android System 6% (CPU total: 34m 18s, CPU foreground: 1m 4s)

Tablet idle 6% (Time on: 2d 6h 30 m)

Android OS 5% (CPU total: 24m 7s)
[Nexus 9 General] octagonPerfectionist:
honestly if they just added that extra 1GB of RAM the device would probably be /so/ much better. i get the feeling that a majority of the problems it faces are just with running out of ram. if it had more, it wouldn't even matter that it's extremely inefficient with handling it since it'd have more than enough anyway. extra points if they'd have given it 4GB of ram, since they can actually do that now with the 64-bit processors. if only they actually thought ahead and designed (and released) a device that wasn't totally broken.

still, hopefully they can fix the memory problems eventually. android is atrocious at memory handling - while it has to use more RAM than an iOS device just by its very nature of being able to run on such a wide range of hardware, it's kind of ridiculous just how bad it is.
[Nexus 9 General] jscsltd:
Just maybe Android M might work more efficiently with RAM and since it appears there's no other Google tablet on the horizon, maybe Google will concentrate on getting the best out of the nexus 9!
[Nexus 9 General] aleandre1974:
Exactly the same pattern for me, also using Firefox (Beta) and an ad-blocker (nice thing with Firefox that you don't have to root for that !). I got 7h 22 screen on time (down to 4% battery) with over 40 hours since last full charge yesterday, so it is finally more decent ! Still not in line with the promised 9 hours... And I keep thinking that the CPU could throttle down some more, even if some stated here that the lowest settings would make the device unusable : When on battery saver mode, the performance I get while browsing (capping the CPU to 1.5 GHz if I am not wrong) is still acceptable, so here is to hoping that Android M will finally deliver on that front by being less agressive with ramping up the core speed without affecting the user experience in any noticeable way, maybe with more sophisticated performance profiles out of the box, a bit like what Asus Tablets like the Transformer Prime & Co. had ?
[Nexus 9 General] akhil8377:
With these stats

I believe it could have given more than 9 hours of screen on time, if it was not consuming battery for balance 32-33 hours sleeping. 40 hours of standby time having 7 hours of screen on time. I get 7-8 hours with 5.0.1 and 5.0.2 however it greatly depends on what activity screen is on for

:)
[Nexus 9 General] ewa12321:
Finally updated to 5.1.1 LTE version for Germany

Translated with my own brain to English ;)
[Nexus 9 General] rolldroids:
And how does it perform? And how much system RAM usage? I had about 750 after booting. Now I updated play services and wiped the cache partition and have about 100 MB less.

Edit: hmm OK now 750 again...
[Nexus 9 General] maarten08:
I'm having reboots now and then since updating to 5.1.1. Anyone experiencing this?
[Nexus 9 General] aleandre1974:
Not me. I had this, once every few weeks, on 5.0.1, but not anymore since then. A third party app maybe. Try safemode (long press on the power button).
[Nexus 9 General] fsosson:
Hi.

I have problems when upgrading my Nexus 9 to 5.1.1

The upgrade starts then fails with dead Android robot with red spinning stuff in his belly. Can someone provide me a little bit of help?

Thanks a lot

Fred
[Nexus 9 General] rolldroids:
I remember that month before the n9 was released, there were rumors that it will have 5 GB. With that much RAM it would be an amazing device indeed. But I fear that not only OS issues but high display resolution, 128 MB special CPU RAM and 64 bit overhead make it a useless piece of glass. We should start something like a petition with the goal that all n9 owners get a nexus 2016 for free (as there will be no tablet 2015) And that is not meant to be a joke.
[Nexus 9 General] octagonPerfectionist:
here we are, q1 2015, with a $300 budget phone that has 4GB of ram and a q4 2014 flagship tablet (with a flagship price) with 2gb of ram

how far we have come
[Nexus 9 General] rchen91:
this update has been awesome for me so far. i have almost no lag. everything has been loading almost instantly. the device still gets warm but overall my performance has been awesome since the 5.1.1 update. i set my nexus 9 to turn off wifi when not plugged in and that has greatly improved battery life too. For the first time, ive felt like the nexus 9 is performing how it supposed to since it was released
[Nexus 9 General] ChoklitCow:
Hmm. For the first time I've had random reboots when turning on the device and opening chrome. I had been lucky and never had these issues pre-5.1. Even tried a factory reset to no avail thinking maybe when I flashed it I forgot a step.

Everything else seems much better. Looking forward to seeing how M does.
[Nexus 9 General] rolldroids:
Can you please tell how much system RAM you have? And, does it switch between, lets say 5 apps, without redrawing?
[Nexus 9 General] rchen91:
fresh reboot system ram is using 550mb. with about 10 apps open using about 750mb. no redraw, loading & switching apps is really fast.
[Nexus 9 General] AstroDigital:
I lost all ability to download apps and app updates from Google Play

Systems/Apps say everything is 0.00B in size

Memory says calculating

My Nexus 9 has never been rooted, Bootloader is locked, I have no choice but try to unlock it, may try tutorial on flashing an OEM image.