yashsingh1/xdaforums huggingface dataset:
[Nexus 9 General] pantmunu:
How did you get trickster mod working .. Did you manually put busybox ? If yes can you tell me how ? Thanks .
[Nexus 9 General] LinS123:
Well my battery test is still going strong, with 6h30m so far of the movie looping. I think the main drain of the battery is when the SoC heats up. Playing a 1080p video on loop doesn't stress the CPU so I think maybe WiFi also has a part to play, the additional heat added doesn't help. There's something wrong with how simple browsing with chrome seems to ramp up the CPU which in turn ups the heat. I think this might be solved in the future with further optimizations.

To stress the battery life IS NOT BAD but at the same time it's not amazing. I find it fine so far and there will be improvements either through Google themselves or through the dev community here. People are more inclined to write about negative experiences, whereas though who are content are... well content and will not comment because they have better things to do.

I'll post screen shots of the battery test as soon as it's complete, I'm currently as 37% and I'll call the test over when battery saver mode kicks on at 15%.
[Nexus 9 General] USBhost:
Yes i did manually installe busybox

Remove the .IMG

Then put it in /system/xbin

Set permissions to rwxr-xr-x

Then in terminal

su

mount -o remount rw /system

cd /system/xbin

busybox --install /system/xbin/

sync

reboot
[Nexus 9 General] LinS123:
Not bad. Though I'm guessing if you add WiFi usage, like streaming a video for example would impact that a bit more. That and heat.
[Nexus 9 General] LinS123:
Whoops forgot about this page.
[Nexus 9 General] cmit37:
Strangely enough Chrome is using more battery than the screen. This gives me hope that Google can improve the battery life easily with an update.
[Nexus 9 General] tehpud:
Battery life has been solid. Havent plugged it in for 2 days. I just unlocked and rooted so numbers are off. Will post pics when i get stats backl up
[Nexus 9 General] chrisnewton:
I thought Google claimed 9 hours of Web browsing with this battery?
[Nexus 9 General] mk92595:
Those tests are with the lowest brightness setting, location and sync off, battery saver on and no apps installed.. I get 6.5-7.5hrs ost.
[Nexus 9 General] USBhost:
I almost got to 8h on screen but i cant google stuff for 8h
[Nexus 9 General] StuMcBill:
Could we be seeing some of this wifi battery drain which is being reported as the reason that the other OTA's are being delayed?
[Nexus 9 General] StuMcBill:
Yeah...... It's pretty terrible!

I get better SOT from my HTC One M8!
[Nexus 9 General] MRobbo80:
Medium to light use.
[Nexus 9 General] StuMcBill:
Hmmm, I wonder why mines is draining so quickly.
[Nexus 9 General] jaju123:
We need Franco Kernel or something like that :P
[Nexus 9 General] Scotlac:
So, I'm three cycles in and I seem to be getting on average 5 to 6 hours of screen on time. I'm also one of the people getting a really hot spot near the camera lens during light to moderate use.

I'm curious to know if there is a correlation between lower battery life and the overheating issue. Are you guys that are getting 7+ hours of battery life having the overheating issues?
[Nexus 9 General] pantmunu:
Tried it and still a no go . I'm probably doing something wrong . after the install command I get system is read only or something like that ... Will try again later..
[Nexus 9 General] StuMcBill:
I might give it one more battery cycle, and if it's the same, I might wipe and start fresh.

Hopefully I can backup my VEGA Conflict data first!
[Nexus 9 General] Scotlac:
You think that might help Stu? I don't have a single thing on here so far that's not backed up to the cloud so it would be super easy to do at this point.
[Nexus 9 General] StuMcBill:
It might, I have just installed gsam battery monitor and cpu spy so I can keep an eye on what it's doing!
[Nexus 9 General] mjsierra:
How do I do this? Is it setting the max freq? If so, doesn't that limit the CPU during more intensive processes?

EDIT: disregard, figured it tout
[Nexus 9 General] octagonPerfectionist:
i've always found that chrome uses about 2-3x the battery that the screen does. not sure if it's because i'm running the stable build rather than the beta or just because chrome is kinda **** and unoptimized in general.
[Nexus 9 General] mjsierra:
Welp, gave up on 5.1.1. Was running stock when I first got the tablet, but the battery life was horrendous. Tried DU ROM, but didn't improve much, and added a lot of bugs such as stuttering video, sometimes laggy performance, crash in Antutu, just random stuff. Tried to install Amplify and Greenify xposed modules, ended up wiping like 10 times and never got it to work.

So what worked for me is going back to 5.0.2. I installed CM12 and Fire and Ice kernel with suggested modification, and I've got Amplify and Greenify. Things are much smoother and battery life is much better. I think something is really wrong with the 5.1.1 base build. I also noticed that the adaptive brightness was TERRIBLE and always way too bright and ended up installing Velis auto brightness which helped. After switching to CM12, the adaptive brightness was fine.
[Nexus 9 General] daviporciuncula:
I also have CM12 but the tablet is buggy as hell, despite good battery life
[Nexus 9 General] Ace42:
Then why don't you try another ROM..?

Powered by "Yeeart!"
[Nexus 9 General] daviporciuncula:
Was just waiting for Stock 5.1.1

I'll see how it performs now (Y)
[Nexus 9 General] mjsierra:
Really? I'm having no issues at all on CM12. Stock 5.1.1 was terrible for me. The battery life was just awful all around, even while at sleep.
[Nexus 9 General] daviporciuncula:
Performance is top notch with stock 5.1.1

Can't praise about battery yet, but preliminary results are not so exciting. Maybe I'll flash elementaryX ou other Kernel to balance things out
[Nexus 9 General] mjsierra:
Worth a shot. I only pushed a new kernel after changing ROMs to DU, so that may work better for you. I think Amplify and Greenify are huge factors in my current battery life. But the xposed modules don't work on 5.1.1, and I actually had worse performance using it. Not MUCH worse, but at times it would lag a bit when performing an action from idle or switching tasks a lot. Tellin ya, Fire & Ice on CM12 is money.
[Nexus 9 General] eldar4uk:
on CM12 device is really not stable, crashes very often. but battery life is nice.
[Nexus 9 General] i9100g user:
Dirty unicorn-elementalx has been much more stable than stock 5.1 for me

Battery is just average
[Nexus 9 General] taronas:
Battery would be fine if there were no such wake locks. What is this and how to get rid of it?
[Nexus 9 General] mjsierra:
I haven't gotten a single crash on two nightly builds

---------- Post added at 06:55 PM ---------- Previous post was at 06:53 PM ----------

Yeah that's why I went back to 5.0.2 so I could use amplify... My battery at sleep now barely nudges along
[Nexus 9 General] eldar4uk:
mine worked 2 days and still have 17%. great battery life after last update
[Nexus 9 General] celkin:
Ive got a question for you guys, recently (last week) picked up the Nexus 9. Luckily I have had no issues with anything, although I have not yet done a system update. what I'm slightly concerned with is the fact that it takes almost 8 to 9 hours to charge the tablet. now I've tested this with different wires, and different chargers and it still seems to do the same thing. now according to all of the battery apps I have running the battery is healthy, no issues with battery drain or anything similar.

My question is, is this a an issue that is going to come back and bite me in the ass later? I mean should I return the tablet which works perfectly? or should I just deal with a very slow charging tablet?

Any info would be appreciated.
[Nexus 9 General] USBhost:
unlock flash kernel

from 0 to 100 in about 3-4h

if not being used
[Nexus 9 General] celkin:
Has anyone actually corrected this issue with a custom kernel? I have no issue flashing elemental or whatever, was a great addition to my n7. I noticed the fast charge option, but i guess just wanted to confirm this isnt a "bad" battery.
[Nexus 9 General] ChristianJay:
I've noticed running elemental kernel that if you turn off double tap to wake and disable OK google and cards in the google app, the tablet deep sleeps nicely. Running Validus now and same. Google now is a hog.
[Nexus 9 General] madsquabbles:
Custom kernel does allow for faster charging, but your problem may be waht a few here have reported. Sometimes you gotta unplug the usb cable a few times til it charges correctly. Get ampere or gsam to verify you're charging full speed.
[Nexus 9 General] celkin:
Thank you! I have an odd feeling that im dealing with a defective charger. Well maybe not defective, but garbage might be a better word,

When i charge with my S4 charger, the charge time goes from 9 hours to 4. Strangely i tested this before i posted, and it didn't seem to help. So what you are saying might actually explain it.

Thanks for your input.
[Nexus 9 General] celkin:
Wow... Ok. That's interesting for sure. You are totally right, ya plug in the tablet once it pulls 900-1000 ma, unplug it, plug it in the same socket, with the same charger/wire and it pulls 100-200ma WTF!
[Nexus 9 General] madsquabbles:
I'm pretty sure it's a kernel issue. Since I've been on aicp and fire ice kernel I haven't had this happen in a long while. On stock I always had to double check my power input before I put my tablet down or it would either just trickle or on occasion lose charge overnight.
[Nexus 9 General] celkin:
I wonder if upgrading stock will fix this? I mean its not the biggest issue in the world, but still. Im still on 5.0.1, maybe an upgrade is needed.

You are probably right with the kernel issue as opposed to hardware though. Thanks again for the input. :)
[Nexus 9 General] lilliput222:
im big fan of u and ur contribution :) .

Can you tell me which particular build date of of rom u are using for that kind of Screen on Time :D
[Nexus 9 General] USBhost:
... I have no idea to long ago
[Nexus 9 General] lilliput222:
after changing the high_speed freq to abt 700mhz from trickster ,, i noticed gpu frequency goes beyond above 700Mhz when touching the screen .. is this normal .. before that it stays between 400-500 i think
[Nexus 9 General] USBhost:
That's normal
[Nexus 9 General] lilliput222:
after going through over 100 pages i have to ask this noobish question ..

flashed fire-ice9.2.4 on latest aicp ..noticed the highspeed freq is 1500mhz so lowered it to 700mhz ... but everyone is sayng fireice kernel have gov fix script included ,, i still wonder how to use it and is it present in 9.2.4
[Nexus 9 General] USBhost:
use 9.3.3

also let your n9 boot up

wait about 1min
[Nexus 9 General] lilliput222:


---------- Post added at 05:46 PM ---------- Previous post was at 04:51 PM ----------

Was using 9.3.3 ,, then flashed previous version coz of very positive battery life and everything is so smooth on 9.2.4 ,,My all noobness come to an end if u tell me ur 13 hrs SOT secret (exact rom and kernel build dates that u were using that time ) .... Still wondering how to use that gov fix script ,, just ..Teach me Master
[Nexus 9 General] lilliput222:
Desperate fanboy desperately waiting for reply..
[Nexus 9 General] i9100g user:
Medium to heavy usage 75% drain 6hr 45 mins sot
[Nexus 9 General] lilliput222:
Is it normal to get charger really hot , although no burning smell but make slight buzzing sound if I listen very carefully
[Nexus 9 General] i9100g user:
It is normal

http://superuser.com/questions/8324...supplies-generate-a-whining-noise-and-what-ca

Heat is also normal unless it goes way too hot of course (it starts melting down)

Basically charger is supplying energy and some of the energy gets converted into heat as the charger is not 100% efficient (nothing is)

I think I can hit 10 hour mark if my usage is lighter
[Nexus 9 General] USBhost:
lol sorry man

try this on 9.4

turn off zram

screen at the lowest brightness : its at 0% all day for me because i think it's too bright

lower cpu to 2ghz

trun off UKSM
[Nexus 9 General] lilliput222:
Is UKSM and KSM are one and same thinng .. Using ek kernel manager app ,, no such option to disable it ,, however in kernel audior there's KSM option under kernelsamepagemerging

Desperate fanboy still desperate :p
[Nexus 9 General] USBhost:
in a way UKSM is KSM but its not

UKSM is better than KSM

to turn off UKSM only if your on 9.4

do "echo 0 > /sys/kernel/mm/uksm/run"

or just edit the afterboot in /system/etc/FI.d
[Nexus 9 General] lilliput222:
My first battery stats

Rom-du9.4

Kernel-fire-ice9.4 wid some tweaks suggested by Usbhost above

Meduim usage downloading , installing apps , youtubing , watching hd videos songs, chroming 20mins

Unplugged yesterday 7pm still on 18 percent ,hoping to get it to 8hrs

Update few percent left over 8.30 hrs sot

I have one query .. Cpu z shows my cpu thermal temp around 40-45 at idle , while Ex Kernel manager app shows 35-36 ,, i dont know which one to rely upon sometimes i feel cpuz is right as back gets warm sometime other

Desperate nexus fanboy still desperate for more
[Nexus 9 General] seanashmore:
I recently got back into reading a little, I saw the trailer for 'the martian' movie that's coming out and decided to read the book first, highly recommend it. Anyway, I was also getting back into AOSP again and pulled down 5.1.1_r5, made some tweaks to the default settings, enabled dev options by default, commented out the fingerprint check etc.

Anyway, I've been using my N9 as mainly an eBook reader with some facebook and google+ as well and the battery life has been absolutely incredible. It's been running since the 26th June until today July 1st, it has 44% battery left, sot of roughly 4h 30m.

What I find very interesting is that when looking through the r5 code I could see references to Doze here and there and I'm wondering if they have maybe slipped some of it into the code and it is kicking in. I don't believe my battery life has been this good before although it has always been pretty decent. Anyway, here are some screens to show what I'm talking about. Has anyone seen similar results with 5.1.1_r5?

http://imgur.com/a/vo52V
[Nexus 9 General] borchgrevink:
Fingerprint check?
[Nexus 9 General] seanashmore:
Fingerprint check as in the fingerprint of the build. It's a check that Google put into the code, so when you start up your aosp rom it gives some message about an 'internal error'. People released patches but I just made a change to the code to disable it and committed to github, its made its way into some ROMs which is nice :)

On topic though, the n9 lasted 8hrs of SOT over about 6 days, that's seriously impressive even if I was only using it for reading and Facebook/Google+ and an episode or two on Netflix.
[Nexus 9 General] lilliput222:
6 days with 8hrs sot ,, that's freaking insane . right now I'm at 7 hrs sot with time on 16 hrs
[Nexus 9 General] mirrorman96:
What's battery life like

I'm thinking about getting a nexus 9 becuase I'm fed up with my shields 5 hours sot. What's the nexus 9 battery like on the latest update and on android m?
[Nexus 9 General] borchgrevink:
Thanks. Only possible to disable with root?
[Nexus 9 General] lilliput222:
Can you explain the procedure to disable it
[Nexus 9 General] leyvatron:
I get about 5 hours of screen time. Might want to research before you make the jump. The 9 is nice, but many have issues.
[Nexus 9 General] NYCHitman1:
I imagine you bought a Shield to have access to Nvidia's GRID. If that's the case - I would steer clear of the Nexus 9. You will not have access to GRID or any of the Nvidia exclusive titles.
[Nexus 9 General] mirrorman96:
To be honest I just bought it becuase it had the k1 in and it was fast. The shield is good but it takes its time to charge and the battery life is a bit short. The display could also be a bit better but its not bad
[Nexus 9 General] NYCHitman1:
Has pretty much the same specs as the Nexus 9. Difference would be HTC's speaker setup, slightly larger battery, display size, and higher internal storage (but lacking expandable memory unless you use OTG).
[Nexus 9 General] mirrorman96:
Its a bigger battery but is the battery life any better
[Nexus 9 General] NYCHitman1:
I go a few days between charges, but it's rather optimized on my ROM too - so there's that.

I'm sure you could squeeze some extra life out of it if there's some custom development for kernels on the Shield.
[Nexus 9 General] darkchazz:
It depends on your usage, but I reckon you won't be able to get that much better SOT on the Nexus 9 compared to the shield tablet.

Yes it has a bigger battery and a more efficient display, but the K1 chip remains power hungry.

You can easily get around 10 hour SOT if all you do is reading, but push the processor hard and it will suck the battery in just a few hours. And you will often notice the device getting very warm on the back near the camera.

If you do a lot of gaming, keep in mind the Nexus 9 does not support the OpenGL API, so it won't run some of the shield games such as Half-Life 2 and Portal.

What else....

My N9 takes ~4 hours to charge fully from about 10%

As for the display quality, it definitely has one of the best and most accurate LCD displays on any device at the moment, and goes head-to-head with the ipad air 2's display. Only issue is excessive light bleed but I think they fixed that in the newer batches by now.
[Nexus 9 General] seanashmore:
I am editing the actual source code to always make the check return true, so effectively bypassing it. Then I build the rom and flash as normal. I have seen a flashable patch (via twrp etc) on various roms in the 'android development' forum.

---------- Post added at 02:41 PM ---------- Previous post was at 02:38 PM ----------

I am editing the actual source code to always make the check return true, so effectively bypassing it. Then I build the rom and flash as normal. I have seen a flashable patch (via twrp etc) on various roms in the 'android development' forum.
[Nexus 9 General] lilliput222:
Can you make a patch . If not you can refer the matter to various developers here , they will surely do something for this
[Nexus 9 General] seanashmore:
I'm not sure how to make the patch or the best way to go about it to be honest. I only made the change in my own aosp ROM because I didn't want to flash the fix every time I installed a new ROM/update. Here is my git commit, ignore the commit message, is still needed even when using the 5.1 vendor IMG.

https://github.com/seanashmore/frameworks_base/commit/27f5b7b3bc34ebb39e4c04b40563ae7f901ea502
[Nexus 9 General] lilliput222:
New battery stats .. 100% to 17 , SOT 6H 48M ,, 1.5 days , Skype call More than Hour ( sucked battery really fast ) , 2 hours candy crush , chrome beta 10 min ,fckn mediaserver awake for 4 hour (don't know why )
[Nexus 9 General] mirrorman96:
You say you get 7 hours + but the person above says 5 hours. I don't know what to think becuase people are telling me all kinds of things.
[Nexus 9 General] NYCHitman1:
FWIW, I've had and seen others have higher SoT. However, I'm more concerned with total uptime, which could last you days.
[Nexus 9 General] lilliput222:
If i use it lightly im pretty sure i can get more than 3 days ... Also im using custom rom ... On stock just need to tweak two things after root "cpu_highspeed” and ”above_highspeed_delay" and you are good to go . Its difficult for me to post stats on light usage coz im moderate to heavy user
[Nexus 9 General] mirrorman96:
the nexus 9 is £119 off at the moment so i think i will get one. i just hope i do get around 8 hours or better battery life. i would stick with my shield but for example today i only got 4 hours screen on time. i think the nexus 9 is a bit better than the shield because i like the aspect ratio more and i dont watch videos full screen so that wouldnt bother me. the resolution is higher, gets updated quicker, hopefully more stable updates than the shield and i think the speakers a meant to be slightly better.
[Nexus 9 General] lilliput222:
Speaker are over powered , check linus review on youtube
[Nexus 9 General] seanashmore:
It has just occurred to me that I made changes to the cpu freq settings. I completely forgot I had done it. I have reduced the max cpu speed and the hispeed_freq. I will point out however that the performance of my N9 has shown no change whatsoever, it runs great with no lag whatsoever. Heres' my git commit:

https://github.com/seanashmore/device_htc_flounder/commit/cf51e5e5eeaa6b06a2cf29e77787184cfea4d589

Second charge around and stats are:

SOT: 3h

Tablet Idle: 5d 20h 16s

Fairly light usage with browsing/facebook/google+ etc. Used CPU-Z to confirm that my changes to the cpu governor were kicking in, all looks good.
[Nexus 9 General] lilliput222:
You are on stock . M i right ? . still wonder the magic behind 6 days wid 8hrs sot
[Nexus 9 General] seanashmore:
No I am on my own AOSP rom built from 5.1.1_r5 with the cpu governor changes I mentioned before. Though as I said in an earlier post I see bits and pieces of doze code in there (which is part of M preview) so it's possible that that is what's giving me such great battery life right now, but I don't know.
[Nexus 9 General] lilliput222:
Can you upload your own AOSP build and help us to get that great battery life ...
[Nexus 9 General] seanashmore:
Sure, just give me a few minutes to remove logging from Launcher3, i'm in the middle of playing around with it; The build shouldn't be long.

---------- Post added at 05:52 PM ---------- Previous post was at 05:34 PM ----------

OK here we are:

https://drive.google.com/folderview...lpN2FEWFZPT2x3MkVWTDB6YlBVTDNqTG8&usp=sharing

Let me know if that link works ok for you. I have included the build as a zip, the Gapps that I use and also a slightly modified flash-all.sh script which you can use if you're running linux and a flash-all.bat if you are running windows (I am unable to test the .bat script as I don't have a Windows machine at the moment). Make sure you download the bootloader also as the script will look for it and fail if it does not find it.

To use the scripts, enable USB debugging as normal, ensure that your computer can talk to the tablet with 'adb devices'; If this is the case then make sure all the files are in the same folder, run the script and it will reboot into the bootloader and flash the image.

THIS WILL WIPE YOUR DATA - the update command is using the -w flag. if you don't do the full wipe you will probably get all sorts of weird results / bootloops.

Please make sure that 'enable OEM unlock' is enabled before doing anything else as not doing this could lead to a bricked device.

Please only use this if you have flashed roms before or know what you're doing. I can't/won't take any responsibility for what happens to your device, this is all fully at your own risk.

With that said, enjoy! I hope it behaves as well for you as it does for me.
[Nexus 9 General] lilliput222:
Added to my drive ,, will get back to you tomorrow as its 1AM and i need some sleep :D
[Nexus 9 General] ayoraider07:
I used ur zip and flash-all batch file, everything works perfectly! Any chance you will be building an update with r6 base? Do you have any suggestion on kernel for best battery life? What kernel is included with this zip?
[Nexus 9 General] seanashmore:
Glad it worked for you! I do plan on merging the r6 code in this weekend time permitting though I don't know if it includes any big changes. The kernel in the build is the same as the one that comes with stock 5.1.1, built on Apr 9, I haven't touched the kernel itself. I used elementalX quite a bit and it was great for control over your cpu governor which helped a lot with battery life. Having said that, this rom by default has a lower Max CPU freq and a lower hispeed_freq that kicks in when you touch the screen and the battery life seems great with no noticeable performance hit (though that will be determined by everyone else who uses it).
[Nexus 9 General] nyasha1935:
Thanks for the rom, just flashed it as well. The nexus 9 is too powerful and I strongly agree with your governor tweaks