[ROM][OFFICIAL] LineageOS 14.1 for Nexus 9 (flounder)

[ChristopherXI]

Is the device working fine keeping data and cache as ext4 after flashing latest build?

It works normally but runs into a lot of crashes.

 

[Flounderist]

It works normally but runs into a lot of crashes.

Try using fastboot command
fastboot format cache
fastboot format data

Double check if you are on f2fs or ext4 then reflash ROM and gapps.

 

[ChristopherXI]

Try using fastboot command
fastboot format cache
fastboot format data

Double check if you are on f2fs or ext4 then reflash ROM and gapps.

So fastboot format defaults to f2fs instead of ext4?

 

[Flounderist]

So fastboot format defaults to f2fs instead of ext4?

Well, no.
fastboot command ensures that the partition has been formatted properly, regardless of the file system.

 

[ChristopherXI]

Well, no.
fastboot command ensures that the partition has been formatted properly, regardless of the file system.

oh ok.
will try when i get ahold of a computer

 

[ChristopherXI]

So does this support F2Fs on the system+data+cache partitions or it just only the data and cache?

 

[Flounderist]

So does this support F2Fs on the system+data+cache partitions or it just only the data and cache?

There is no point in formatting system partition, either ext4 or f2fs.
Usually you get a small improvement when formatting data as f2fs.
As said before, N9 performance is suffering a lot due to encryption primarily.
Then I would disable ZRAM and swap process.
Lastly format data as f2fs.

 

[ChristopherXI]

There is no point in formatting system partition, either ext4 or f2fs.
Usually you get a small improvement when formatting data as f2fs.
As said before, N9 performance is suffering a lot due to encryption primarily.
Then I would disable ZRAM and swap process.
Lastly format data as f2fs.

Which method did you use to disable zram and swap? I use the Swap torpedo magisk module but with that my tab crashes constantly overall very unstable.

 

[Flounderist]

Which method did you use to disable zram and swap? I use the Swap torpedo magisk module but with that my tab crashes constantly overall very unstable.

I never played with swap.
ZRAM can be disabled from aroma installer in elemental X kernel.
You could try tweaking stock kernel options using kernel adiutor (swappiness) instead of using the module to find the sweet spot. Probably device is requiring for some swap to work properly.

 

[Zurko]

You can flash a custom kernel like elemental X to get rid of forced encryption as well.

My N9 is running very good with this setup:
Latest lineage build
Pico gapps
Lineage su add-on for root
Elemental X
Data formatted as f2fs
No encryption.

Most of the performance loss is due to encryption, so get rid of it as soon as possible.

How to disable encryption? Just flashing the kernel? Thanks

 

[Flounderist]

How to disable encryption? Just flashing the kernel? Thanks

You must format data from twrp and then flash a non-encrypting ROM or a custom kernel.
Formatting data will cancel every file from your device.

 

[Zurko]

And I have to do this each month after OTA linaege Update?

 

[Flounderist]

And I have to do this each month after OTA linaege Update?

No. Device will remain decrypted over ROM flashes.
If I am right, ROM itself is encrypting device, so it would be worth flashing a custom kernel along with the ROM each time.
I would recommend ElementalX kernel.

 

[daitalos]

How to disable encryption? Just flashing the kernel? Thanks

there are several ways....Just format data etc...or >
see & here : https://forum.xda-developers.com/android/software/universal-dm-verity-forceencrypt-t3817389

Kernel : ElementalX or better (my opinion) Fire Ice : https://forum.xda-developers.com/nexus-9/orig-development/kernel-fire-ice-t2930451

( you will need to reflash the kernel after a rom is updated...before Flashing you must to read carefully in OP!)
sry for english

 

[ALeX850]

Hello,
I've searched through the thread but didn't find the info, do you guys know whether lineageOS 14.1 on nexus 9 supports widevine DRM (not sure if flashing LOS is affecting those libraries)? if so, is it L1 or L3? thank you

 

[fblasot]

I have LOS 14.1 on my N9, I use Netflix, Amazon Prime Video and other Italian streaming services (Infinity TV and Mediaset Premium Play) with no problems.

 

[joshndroid]

Thanks for continuing the updates for this device.. I'm extremely glad LOS is keeping the 14.1 stuff alive currently.. while this device is no where near what it used to be it's the only customizable tablet I have and would have been given to the kids whom would have no doubt destroyed it by now lol

 

[gascomm]

I've just rooted, twrp & installed lineageOS14.1... all seems to be running as expected but I keep reading advice to flash a fresh kernel. I'm still on stock.

I'm guessing it's a battery thing. can I get a link and recommended kernel for LOS14.1? thx

 

[ChristopherXI]

I've just rooted, twrp & installed lineageOS14.1... all seems to be running as expected but I keep reading advice to flash a fresh kernel. I'm still on stock.

I'm guessing it's a battery thing. can I get a link and recommended kernel for LOS14.1? thx

there're only 2 real options are ElemantalX and Fire&Ice. ElementalX is not as smooth as Fire&Ice but passes SafetyNet, Fire&Ice fails SafetyNet. Depends on your usesage with the tablet.if you use Netflix or any other DRM protected stuffs you should go with ElementalX

 

[gascomm]

there're only 2 real options are ElemantalX and Fire&Ice. ElementalX is not as smooth as Fire&Ice but passes SafetyNet, Fire&Ice fails SafetyNet. Depends on your usesage with the tablet.if you use Netflix or any other DRM protected stuffs you should go with ElementalX

thank you. that's exactly what I was looking for. is there a recommended/proven version of each for the N9?