yashsingh1/xdaforums huggingface dataset:
[Nexus 9 Original Android Development] jtrosky:
I found the culprit that was causing deep sleep to not work (after monitoring wakelocks). It was the "bluedroid_pm" process - and I only had issues after installing EX Kernel manager and only after rebooting (after installing it)... I'm running ElementalX kernel. The "solution" was to disable bluetooth scanning under the Location settings... BLuetooth was disabled the whole time.

Can someone else see if they can replicate this (SlimROM 7 with ElementalX kernel)? Steps are:

1. Check for deep sleep as-is (using some simple utility like CPU Master).

2. Install EX Kernel manager - set it up to use ElementalX governor (only change from default).

3. Check deep sleep (still works at this point).

4. Reboot

5. Check deep sleep (stops working for me after reboot). I may get a minute or 2 of deep sleep before it stops working.

Obviously, your tablet should NOT be connected to AC power while testing (deep sleep is not "active" while connected to AC power).

No deep-sleep = bad battery performance (obviously!). :)

Thank you! This was driving me crazy.... I thought it was working fine but kept finding that it would "stop" working after a while - it was due to the reboot after installing EX Kernel Manager... Took a while to figure that out! :)
[Nexus 9 Original Android Development] willows:
i have same problem with this rom, before is use stock rom screen on time about 4-5 hours, now with this rom only 3-3,5 hours. Can someone help me how to improve battery life on this rom?

Thanks
[Nexus 9 Original Android Development] madbat99:
Don't think it's the rom. I easily get 4.5 hrs screen on time. Check which apps are draining battery. Greenify and amplify are great helpers. You need to identify the battery draining apps/processes and handle them accordingly.
[Nexus 9 Original Android Development] prbassplayer:
My flounder is getting something in the ballpark of 14h with 6h SoT. It's not amazing but it's a fairly old battery. Not sure how long on only sleeping, I use tab a lot of media consumption.
[Nexus 9 Original Android Development] madbat99:
Sleep time is looong. I can use mine on and off all weekend without charging.
[Nexus 9 Original Android Development] jtrosky:
Check my post right above yours. Like I said in that post, I found that my Nexus 9 running SlimROM, with ElementalX kernel was not going into deep sleep after I installed EX Kernel manager and rebooted. I eventually found that I had to disable "Bluetooth Location Scanning" in order to allow the tablet to enter deep sleep (which conserves battery).

I only had this issue when using EX Kernel Manager to modify the governor (to ElementalX - defaults to Interactive).

Haven't had any deep-sleep-related issues since disabling bluetooth location scanning...

So check to make sure your device is entering deep sleep (with an app such as CPU Master). If it's not, try disabling bluetooth location scanning (or install something like Better Battery Stats app to look at kernel wakelocks).
[Nexus 9 Original Android Development] willows:
Thank you, I will try to disable Bluetooth location scanning. I will let you know later
[Nexus 9 Original Android Development] scoliosis:
Ooops. Didn't see this until now. I am currently on Lineage for the fix. Will find time to swap back to your ROM soon. Thanks!
[Nexus 9 Original Android Development] willows:
Tried to disable Bluetooth location scanning, for streaming youtube and kodi maximum screen on time is 4:30 cannot go more. Wifi always on, bluetooth always off, location history on with battery saving mode, screen brightness maybe about 2-5%. maybe you have any suggestion can make screen on time better ?

Thanks
[Nexus 9 Original Android Development] jtrosky:
When you say 4.5 hours of screen-on time, are you talking about one single block of 4.5 hours or 4.5 hours total between multiple sessions (where there are blocks of screen-off time in-between the sessions)? I'm just trying to understand the issue a little better. If it's a single block of 4.5 hours of screen-on time, then it really doesn't matter if deep-sleep is working or not...

Originally, you mentioned 3.5 hours of on-screen time (and that you got between 4.5 and 5 hours screen-on time with stock). So are you now saying that this ROM is about the same as stock? Again, just trying to understand a little better..

Personally, I've been extremely disappointed in this tablet. With it's specs, it should be really fast - but I get "Hang ups" very often if I load more than a single browser tab or switch between multiple apps. I don't understand it - I have tablets with much lower specs that run circles around this thing! It's a shame, because I love the form factor and the tablet in general, but man, the performance just isn't where it should be...
[Nexus 9 Original Android Development] madbat99:
It's easy to understand the poor performance. Nvidia chip. Everything has to be "translated", that combined with insufficient ram = poor performance/multitasking.
[Nexus 9 Original Android Development] jtrosky:
But I've owned Nvidia Tegra 4 devices with 2GB of RAM that were super fast (in fact, the fastest Android devices I've ever owned).

For example, both the HP Slatebook x2 and the Asus TF701 have nvidia Tegra 4 processors and 2GB of RAM and they perform great. They were running older versions of Android, but the Tegra 4 was also a previous generation of processor compared to what's in the Nexus 9.

It just doesn't make any sense to me...
[Nexus 9 Original Android Development] madbat99:
Also 64 bit.
[Nexus 9 Original Android Development] jtrosky:
From what I've read, the Nvidia K1 is supposed to be about 4 times faster than the Nvidia Tegra 4 - it still doesn't make sense why my Tegra 4 devices (with the same amount of RAM) were so much faster than the Nexus 9 - unless the difference between Android 4 and Android 7 is so great that it kills the performance *that* much.... Maybe I should try loading Android 5 on the Nexus 9 - just to see if Android is at least partially to blame?

I know that things like storage speed can make a big difference in overall performance as well (the Asus Transformer 700 suffered from that), but I can't imaging that HTC used that slow of storage in the Nexus 9 - but maybe they did?

On paper, I just don't understand why the Nexus 9 performs so badly.
[Nexus 9 Original Android Development] madbat99:
We're getting pretty off topic here. But there are many discussions on this topic around the forum. It is a popular topic/debate. You're not the only one interested. But it has been thoroughly discussed. There are definitive and speculative answers.

P.S. Android 5 is definitely not better.

https://xdaforums.com/nexus-9/general/nexus-9-successor-tablets-to-avoid-t3206085/post62914795

I am a fan of n9. It works for my needs. Just some reading (lots of reading) and media consumption mostly. No games (getting to old to have time for that sort of thing). Also use it for basic Android tinkering, it is a Nexus after all.
[Nexus 9 Original Android Development] hilts1967:
Flashed this Rom OK using Nexus toolkit but cant't flash Gapps mini Arm 7.1 version . Is this the correct Gapps package ? What am I doing wrong ?
[Nexus 9 Original Android Development] prbassplayer:
No, nexus 9 is arm64
[Nexus 9 Original Android Development] hilts1967:
Thanks that sorted it.:D
[Nexus 9 Original Android Development] _litz:
I just wish there was a way to solve the "Chrome freezes" and "Graphics freezes" issues on this tablet.

Slim is a lot better than stock, but I still average at least 1-2 reboots a day due to freezeups.

Always (and only) when browsing in Chrome, or doing something requiring graphics (viewing pictures, YouTube, etc).

I can browse in Ghosterey's browser for hours ... Try chrome, it's frozen inside of 30 minutes.
[Nexus 9 Original Android Development] studenttwok:
Hi,

I set my preferred network connection type from LTE to 3G.

But this setting is ignored every time i reboot my nexus 9, or after connection lost.

So it jump back to LTE.

I need to go setting page and it will reconnect as 3G again.

Is this a bug?

Thanks.

I am using Nexus 9 LTE 32GB with Slim Rom v7.1.2 build 2.0

Thanks.
[Nexus 9 Original Android Development] madbat99:
Doesn't happen to me on slim or lineage. (Or aicp for that matter). Have you tried getting logs?
[Nexus 9 Original Android Development] molohov:
Could someone mirror the latest Slim build from slimroms.org? For some reason it downloads VERY slow for me (50kb/s)...and my network is pretty fast.

https://slimroms.org/#/device/flounder

EDIT: NVM, I was able to download this at full speed on another network
[Nexus 9 Original Android Development] BradOPONexus:
Security Updates

I am currently running Slim7 Stable 2.0, and it remains my favorite.

Does SlimROMs provide security updates, or do we have to wait for new version releases?

Thanks again for the best experience.

Brad
[Nexus 9 Original Android Development] joam280:
Without a doubt a great rom, performance and battery.

Enviado desde mi Nexus 9 mediante Tapatalk
[Nexus 9 Original Android Development] SathwikNVS:
I'm coming from official RR Oreo weekly and this rom doesnt bootup in any way... with and without gapps and with and without beans gapps. Just stays at Google screen.

I wiped everything except internal storage.

Flashed the rom

(flashed nothing /flashed gapps/ flashed bean gapps here)

Reboot

Nothing works!
[Nexus 9 Original Android Development] madbat99:
You mean nothing you've tried works. You just haven't done it right yet.

Because you're coming from an Oreo rom. The Oreo ROMs modify Vendor. So if you have a backup of vendor from before you flashed Oreo, restore it. Or extract the vendor.img from the last factory image and flash that.

And your gonna have to format your data, not wipe, format. Which will wipe internal storage. Going back and forth from Oreo to nougat, yep, gotta format data.
[Nexus 9 Original Android Development] freddienuxx:
nav menu button doesnt work on any third party launchers. is there a fix for this? thx in advance
[Nexus 9 Original Android Development] black187:
Does Slim Rom support any OTA updates - I cannot find any update settings?
[Nexus 9 Original Android Development] madbat99:
There aren't any more updates anyways.
[Nexus 9 Original Android Development] StonyD:
Have issue after clean flashing of slimrom 7 2.0 stable and gapps nano

Device wont Boot

Without gapps it Boots

Have someone a solution?
[Nexus 9 Original Android Development] vanquishe:
I came from stock yesterday, n9f27m

- fastboot oem unlock = success

- fastboot recover twrp for flounder = success

- format + wipe = success

Flashed slimrom 7 2.0 stable, gapps nano, supser su

Reboots and stays at slimrom boot animation for >15mins

So i tried the same with Lineage 14 and Beansapps. Boots up fine.

Any idea what Im missing to get SlimRom up and running. Could it be the vendor.img?

Also, what format should data be? ext4 or f2fs?
[Nexus 9 Original Android Development] Shadow6934:
Had the same problem as you both. Dug back in the thread and it seems the problem is gapps. I used beans gapps and it booted properly - https://xdaforums.com/android/software/gapps-dynamic-gapps-t3487192
[Nexus 9 Original Android Development] vanquishe:
Tks.

I will try slim 2.0 with beans gapps next.

Did u install root? If so, did u use the one posted at leanage or Super Su? Or something else?
[Nexus 9 Original Android Development] Shadow6934:
No root, sorry. Good luck!
[Nexus 9 Original Android Development] olufadi1:
I'm currently on Lineage 15.1. If I want to return to Nougat with SlimRom are there any extra steps I need to do before wiping, formatting, and flashing SlimRom and Gapps?
[Nexus 9 Original Android Development] ChristopherXI:
reflash vendor image from the latest 7.1.1 stock factory image
[Nexus 9 Original Android Development] vanquishe:
Ok you were right, I was able to proceed using beans gapps. Its up and running now. I have two nexus 9. So I will do one in Slimrom 2.0 and the other with lineage 14.1 and see which I prefer after a few weeks.

Also, I read somewhere that nexus 9's data is f2fs originally, so I formatted data to f2fs in recovery.

Thank you the information. For now, nexus 9 seems really snappy!!! and im a happy man
[Nexus 9 Original Android Development] Zackptg5:
Los is still being updated which is the major perk there but slim had always run better for me
[Nexus 9 Original Android Development] daitalos:
agree...Los14.1 is still being updated, but Slim 2.0 works much better fast & stable than Los on my device

I do not change slim for no reason yet, since it operates without problems (and with good battery management)

sry for english

:good:
[Nexus 9 Original Android Development] ronald_loulan:
Same here, with working very well especially with fir&ice kernel.

Really hope they can continue to dev for our device....
[Nexus 9 Original Android Development] daitalos:
unfortunately the development for our device is over(I think)

(I meant, the official support from any rom)

In 8.1 there is the known HW problem etc..

yes i use Fire Ice kernel and works better than ElementalX on my device

_So, we stay in Slim stable 2.0, it's the best rom for N9

sry for english
[Nexus 9 Original Android Development] 4everAnoob:
GPS not working, is that normal or is it my device?

EDIT: total nonsense. GPS works perfectly! Very useful for navigating in car.
[Nexus 9 Original Android Development] kacang87:
hi guys..can someone help me..I cant boot up with this rom..flash latest bootloader and vendor still no luck..

what I did is flash slimrom 2.0 and beans gapps..

stuck at slim logo..no bootloop..where I missing?
[Nexus 9 Original Android Development] cmplaya:
join da club son.

been watching thatcolor changing S for hours despite reboots and wipes etc up da wazoo
[Nexus 9 Original Android Development] maximiliano1:
Hello all, can't find any step by step instructions, please, help me install the ROM. I'm on stock 7.1.1 LTE, unlocked bootloader, Usb-host's modified TWRP, supersu rooted, Fire-ice kernel, disabled forced encryption with Fed-patcher. Please give instructions how to flash this ROM. Also what kernel and GAPPS are recommended? Thanks in advance!
[Nexus 9 Original Android Development] maximiliano1:
All done! As far as I was on latest stock, I didn't flash bootloader and vendor, just made a full wipe, then flashed ROM, open GAPPS nano, and Fire-ice kerner, everything works fine so far! Huge thanks to devs!
[Nexus 9 Original Android Development] sanilii:
Hi there.

So far I love the Slim ROM, but used Beans GApps and now Google Play Services drain my device in no time. Can I just flash another GApps or do I need to remove anything first? And if so, how?
[Nexus 9 Original Android Development] madbat99:
Wipe system, then reflash ROM and gapps.

You might want to make sure to remove any updates that any gapps have gotten. So only the original system app remains (just for any Google apps I mean.)

Have you tried clearing data and cache for Google play services?
[Nexus 9 Original Android Development] sanilii:
Thank you, I thought maybe I could go without flashing the ROM again.

Yes I cleared data and cache multiple times, it also wasn't a problem from the beginning but every "standard" solution so far failed to work for me.
[Nexus 9 Original Android Development] madbat99:
You can dirty flash the ROM (no data wipe) just wipe system first. All of your settings and data will stay.
[Nexus 9 Original Android Development] daitalos:
Slim 7.1.2 is still the most stable rom for Nexus9

works very well,fast & with good battery management

screenshots from benchmark with stock kernel 138232 ?

(I was using Fire Ice in the past)

https://postimg.cc/gallery/ko9cwdz2/

:good:
[Nexus 9 Original Android Development] doop:
Agreed. Have tried them all and other than vartoms 32 bit ROM this is the smoothest 7.1.2 going. Vartoms ROM unfortunately eats my battery :(
[Nexus 9 Original Android Development] sladflob:
I installed this ROM the other day and it's working great - thanks for your work on it.

One question... I don't have a Root menu item in the Developer menu. Is this normal? Should I root using SuperSU instead?
[Nexus 9 Original Android Development] prbassplayer:
We don't include root since it breaks SafetyNet (so some apps won't work). You can flash root zips. Personally recommend magisk
[Nexus 9 Original Android Development] sladflob:
That's good to know. Thanks!
[Nexus 9 Original Android Development] tricke:
Hi is anyone having problems with notifications? Google calendar events aren't appearing. Also Outlook new mail notifications aren't appearing.
[Nexus 9 Original Android Development] tricke:
If anyone else has this problem, I solved the problem by "resetting all application defaults"

**edit

Thought this solved it, but notifications are not showing again
[Nexus 9 Original Android Development] beboxed:
When I flash my n9 with slim-flounder 7.1.2 beta build 25 and opengapps arm64 7.1 nano, the setup wizard crashes when I click on 'setup as new' or 'copy your data'.

Does anyone else experience this?
[Nexus 9 Original Android Development] prbassplayer:
This isn't a rom problem, more likely service outage on your area. I use flounder daily and notification sync (calendar, reminders etc) work as expected.

You the same guy reporting this on G+?
[Nexus 9 Original Android Development] beboxed:
Nope, did someone write about something similar in the G+ of SlimRom?
[Nexus 9 Original Android Development] prbassplayer:
Yup. Didn't get a chance to investigate yesterday to una to dl latest opengapps. Might have an idea of what it could be, if so tomorrow's weekly should solve it.
[Nexus 9 Original Android Development] beboxed:
That would be great and I'll definitely try the new weekly.

In the meantime I've also tried slim-flounder 7.1.2 beta build 0.20, which also made the setup wizard crash. slim-flounder 7.1.1 alpha build 0.7 did not have the bug, I could successfully take that build thru the setup wizard.

Cheers!
[Nexus 9 Original Android Development] prbassplayer:
Mind trying to grab a log if possible? Won't be near a pc for a few hours
[Nexus 9 Original Android Development] prbassplayer:
https://bugs.slimroms.org/issues/304
[Nexus 9 Original Android Development] beboxed:
Nice! Build 0.26 has resolved the bug where the setup wizard crashes. I've successfully finished the setup on my n9.
[Nexus 9 Original Android Development] irishpadres:
Just update to Slim7 BETA 0.27 and got an error on boot:

"Android System

Wrong vendor image detected. The required vendor image for this ROM is N9F27C. Please flash the matching vendor image to remove this message and ensure your system will be working reliably."

Going to try to extract the vendor image from the Google OTA download site and see if that fixes it.
[Nexus 9 Original Android Development] prbassplayer:
Yup. Witth every security update, for now, you need to update vendor [emoji14]
[Nexus 9 Original Android Development] irishpadres:
For anyone else, I resolved it by going to https://developers.google.com/android/images#volantis, downloaded the matching "N9F27C" update, extracted vendor.img, booted into fastboot mode, and flashed using `fastboot flash vendor vendor.img`.
[Nexus 9 Original Android Development] prbassplayer:
You can also flash the img with twrp ;)
[Nexus 9 Original Android Development] Bugenhagen:
Since you use some Lineage code, will the recent official support of LineageOS for the Nexus 9 affect Slim?
[Nexus 9 Original Android Development] prbassplayer:
Why would it? I mean I always keep an eye on their trees see if they get anything I'll need but no, in general shouldn't affect one with the other
[Nexus 9 Original Android Development] Bugenhagen:
Thanks for the reply. I thought that perhaps now their updates might become better and more extensive and by extension Slim would too?
[Nexus 9 Original Android Development] daitalos:
Stay in Slim stable 2.0 - 7.1.2,is best rom for N9 ....If you want, you can use & govtuner : https://xdaforums.com/android/software-hacking/mod-gov-tuner-project-29th-june-2016-t3407828

(I'm using balanced & sometimes battery mode with very good battery management)

For kernel,I personally prefer Fire Ice & not elementalx : https://xdaforums.com/nexus-9/orig-development/kernel-fire-ice-t2930451
[Nexus 9 Original Android Development] FonderPrism:
Just tried flashing SlimRoms the latest stable (7.1.2.build.2.0), but it keeps locking up when I install GApps. It boots fine after flashing SlimRoms, but after flashing GApps ARM64 7.1 nano it never gets past the boot animation (the "S").

Any fixes? I read somewhere that trying an older SlimRoms version could help, but I haven't been able to locate a download for that anywhere.

EDIT: Just tried Beans GApps, and they worked fine!
[Nexus 9 Original Android Development] ltndat99:
I'm sorry. Please help me!

I'm using Slim stable 2.0 - nano g. / twrp 3.3.0 / supersu v2.82 sr5 (no magisk here) / busybox(st)1.30.1 / Fire Ice kernel / SELinux Switch-(permissive) / universal dm verity-fed / universal init.d injector / govtuner 4.1 / kernel adiutor /some buildprop tweaks but antutu 119119 point. Sometime, my n9 laggy.

CPU 33508, GPU 48501, UX 32086, MEM 5024.

My English is bad
[Nexus 9 Original Android Development] daitalos:
I no longer have the device

Look here :

N9 antutu etc : https://postimg.cc/gallery/29qbhczpa/
[Nexus 9 Original Android Development] ltndat99:
I need backup Slim7 + govtuner + ice of you. Because govtuner 4.1.1 have problem with my Slim7. I don't know problems.

My antutu 122k without Gov

My antutu 100k with Gov

Your antutu 140k!!!!

Sorry my English
[Nexus 9 Original Android Development] shallwedance:
Hi everyone. I just have gotten myself a N9 and it's still on stock rom. So far, I have no complaint but the external speaker cause it does produces tiny and annoying choppy sound every like 15s when playing music/video. Someone on another post suggested flashing a custom rom might help so I would love to give it a shot. This slim 7 seems like a good choice but I still wonder if it works with the LTE model. Thanks so much for any help.
[Nexus 9 Original Android Development] daitalos:
For N9 LTE here : https://slimroms.org/#/device/flounder_lte

---------- Post added at 21:07 ---------- Previous post was at 20:59 ----------

What backup? i no longer have the device !

You can try with Gov Tuner 4.2 (latest)

https://mega.nz/#!MuJEBYAI!DMsG_H-IKsVKNxIp_A0AWEpTcC9atiAQc2-xR4cJpSU
[Nexus 9 Original Android Development] ltndat99:
What is difference between GOVtuner & Lspeed? I have been use both, but this not increase speed my Nexus9, so this opposite my Neuxs9 is slow lag. Sometime my Nexus9 have White Noise Loudly

I install LineageOs 14.1 + Kernel Fire-Ice. Please give me your idea! :o:o
[Nexus 9 Original Android Development] Susanth Alapati:
can someone post a link to download the official slim 7. slimrom.org seems to be down and I can't find it anywhere else.
[Nexus 9 Original Android Development] rkmFL:
I had the same issue. I was able to use the following archive of Slim7 2.0:

Google Drive - Virus scan warning

drive.google.com
[Nexus 9 Original Android Development] NathanielCaron:
the address is https://slimroms.org/ btw... and it's still up as of today
[Nexus 9 Original Android Development] JT1510365:
yes but all the download links are gone https://slimroms.org/#/device/flounder
[Nexus 9 Original Android Development] NathanielCaron:
This is true...

I've put some stuff I have on my machine here

Index of /
[Nexus 9 Original Android Development] adilshoukat:
Can you please share the installation instructions as well?
[Nexus 9 Original Android Development] daitalos:
https://slimroms.org/#/support/install
[Nexus 9 Original Android Development] adilshoukat:
This link has everything but installation instructions.
[Nexus 9 Original Android Development] daitalos:
slim roms / support install ...

Read again writes what is needed
[Nexus 9 Original Android Development] prbassplayer:
I mean not really. Flounder still supported by aosp for N so not much will change. O will be another story all together, assuming we can get O to work at all.