ROM][Flounder][8.1][UNOFFICIAL] LineageOS 15.1 for Nexus 9 (6/13/2019)

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JT1510365

Senior Member
Jan 7, 2014
2,847
2,175
25
South Lyon
HTC Thunderbolt
https%3A%2F%2Fimg.xda-cdn.com%2Fy-LtXHGCDBH0KxFw9MxWAPF3guk%3D%2Fhttp%253A%252F%252Fi.imgur.com%252F2okPze5.png
LineageOS 15.1 is a free, community built, aftermarket firmware distribution of Android 8.1 (Oreo), which is designed to increase performance and reliability over stock Android for your device.

Code:
#include <std_disclaimer.h>

/*
 * Your warranty is now void.
 *
 * We are not responsible for bricked devices, dead SD cards,
 * thermonuclear war, or you getting fired because the alarm app failed. Please
 * do some research if you have any concerns about features included in this ROM
 * before flashing it! YOU are choosing to make these modifications, and if
 * you point the finger at us for messing up your device, we will laugh at you.
 *

LineageOS 15.1 is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. You will need to provide your own Google Applications package (gapps). LineageOS does still include various hardware-specific code, which is also slowly being open-sourced anyway.

All the source code for LineageOS 15.1 is available in the LineageOS Github repo. And if you would like to contribute to LineageOS, please visit our Gerrit Code Review. Your changelog is whatever was merged into gerrit.

Bug reporting:

Before the report make sure that you've installed the latest build of the ROM.
Explain the bug in details and, if possible, methods to reproduce it.
For most issues, you should attach the logcat.
Random reboots? Please upload last_kmsg immediately after the kernel crash.

Note: I will only be providing builds once every month and when new security patches come in. I don't have enough time to be making them every week. Latest build provided should have the June 2019 security patches. These builds should be pure Lineage based builds and they have not been tested so if you could give me feedback i would appreciate it. Please download the latest version of ARM64 OpenGapps and flash along with the ROM to be able to use the play store and other google related services. Also make sure you are using latest twrp recovery. If you want to root i recommend flashing and using Magisk 19.4. Enjoy and i hope you appreciate my pure Lineage 15.1 Unofficial builds for Flounder.

Downloads:

Latest 6/13 build for Flounder is here: https://www.androidfilehost.com/?fid=6006931924117894640
ROM Download folder is here: https://www.androidfilehost.com/?w=files&flid=295480

Sources:

Device Tree: https://github.com/LineageOS/android_device_htc_flounder/tree/lineage-15.1
Vendor Tree #1: https://github.com/TheMuppets/proprietary_vendor_htc/tree/lineage-15.1
Kernel Tree#1: https://github.com/LineageOS/android_kernel_google_msm/tree/lineage-15.1
Kernel Tree#1: https://github.com/LineageOS/android_kernel_htc_flounder/tree/lineage-15.1
 

JT1510365

Senior Member
Jan 7, 2014
2,847
2,175
25
South Lyon
HTC Thunderbolt
Thank you for continuing the support of this device even when all the other devs moved on to newer, better devices.
If testers are needed, i'm just one pm away

Thank you so much for your kind words it really mean a lot to me:) I always love to at least try to make new ROMs for you all. Unfortunately i took apart my nexus 9 and i ended up breaking the motherboard so i can't test these ROMS but hopefully soon i will try to fix my nexus 9 and have it working again i just don't know when. So if you could test my ROMs and give me feedback i would appreciate it:)

I just made crdroid oreo for flounder if you could test it would mean a lot to me:)

You can download it here:

https://forum.xda-developers.com/nexus-9/development/rom-crdroid-4-7-2-6-13-2019-t3939669
 

ChristopherXI

Senior Member
Mar 10, 2015
507
157
Ha Noi
Crdroid Oreo for flounder is coming next:)

Thank you so much for your kind words it really mean a lot to me:) I always love to at least try to make new ROMs for you all. Unfortunately i took apart my nexus 9 and i ended up breaking the motherboard so i can't test these ROMS but hopefully soon i will try to fix my nexus 9 and have it working again i just don't know when. So if you could test my ROMs and give me feedback i would appreciate it:)

I just made crdroid oreo for flounder if you could test it would mean a lot to me:)

You can download it here:

https://forum.xda-developers.com/nexus-9/development/rom-crdroid-4-7-2-6-13-2019-t3939669

Right away
 
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mrk2815

Senior Member
May 16, 2012
1,435
324
burbank
i'm also here to test.i will be willing to flash this to my Nexus 9 LTE which is not doing anything at the moment and would like to have some oreo love or pie love.

---------- Post added at 04:21 PM ---------- Previous post was at 04:17 PM ----------

sure will these rom builds work on a nexus 9 LTE as well.i will test as i dont use the nexus 9 lte that much. would like to have a newer build of lineage on the nexus 9 lte.
 

Taomyn

Senior Member
Jul 12, 2006
806
144
Luxembourg
Thank-you so much for this ROM. I really wanted to get a little more lifetime out of my N9 while I wait for something suitable to replace it, and Android 7 just wasn't cutting it any longer when all my other devices have moved on.

FYI, I have the LTE version and so far I've had no issues, except for one shutdown while the tablet was idle overnight, though at first I forgot to wipe the system partition before applying the ROM and it just boot-looped.

I did notice that after using it for about an hour the front near the top or left (depending on how you hold it), was extremely hot - I'd been watching some YouTube videos but before this ROM it had never been as hot as this time.

Still, please keep up the updates for as long as you can.
 
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Maxda2367

New member
Jun 18, 2019
2
1
I just installed the rom and tried if HW video acceleration works. It doesnt.

Youtube plays videos, but quite shaky due to CPU.
Netflix quits when trying to play something with error code 5.8.

Maybe it would be helpful to make a note of it in the first post?
 
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madbat99

Senior Member
Mar 1, 2014
5,538
3,287
I just installed the rom and tried if HW video acceleration works. It doesnt.

Youtube plays videos, but quite shaky due to CPU.
Netflix quits when trying to play something with error code 5.8.

Maybe it would be helpful to make a note of it in the first post?
Those 2 things have nothing to do with hw acceleration. Nougat has no issues with hardware acceleration. That's only in Oreo and up.
Edit: my mistake. Late night reading
 
Last edited:

proeprnorf

Senior Member
Jun 30, 2012
197
23
Finally got around to looking into this. I Extracted RR, disabled forceencrypt, added the blobs, and wholla! Looks like we have hw accel (sort of, that thread you linked said there were still some apps it didn't work in).
All I did to test it was youtube. With the official build (no hw accel), youtube was fine when it was in the foreground. But when it was minimized into the mini window in the corner, it got laggy.
With the new blobs, it all works smoothly (and the rom in general seems a little bit smoother.
@sixohtew I slapped this build together . If you don't want it here or drop another official build with the new blobs and such, I'll take this down.

Here it is: https://www.androidfilehost.com/?fid=962339331459001370
I built it with superr's kitchen so build number will say 'built with rr' or whatever but it's still the 20180423 build.
It worked with the latest official opengapps nano too. Not sure if that's on their end or what but a double win for me :)

On second thought, it'd be easier just to make a zip to add the blobs rather than have to download that modified rom so now you have 2 options. Either use the modded rom above, or just flash the official one from the OP and then flash this zip after (you'll still need to flash the modified forceencrypt enabler several posts back in this case)

Will this work in this build ? anyone tried it ?
 
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  • 14
    https%3A%2F%2Fimg.xda-cdn.com%2Fy-LtXHGCDBH0KxFw9MxWAPF3guk%3D%2Fhttp%253A%252F%252Fi.imgur.com%252F2okPze5.png
    LineageOS 15.1 is a free, community built, aftermarket firmware distribution of Android 8.1 (Oreo), which is designed to increase performance and reliability over stock Android for your device.

    Code:
    #include <std_disclaimer.h>
    
    /*
     * Your warranty is now void.
     *
     * We are not responsible for bricked devices, dead SD cards,
     * thermonuclear war, or you getting fired because the alarm app failed. Please
     * do some research if you have any concerns about features included in this ROM
     * before flashing it! YOU are choosing to make these modifications, and if
     * you point the finger at us for messing up your device, we will laugh at you.
     *

    LineageOS 15.1 is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. You will need to provide your own Google Applications package (gapps). LineageOS does still include various hardware-specific code, which is also slowly being open-sourced anyway.

    All the source code for LineageOS 15.1 is available in the LineageOS Github repo. And if you would like to contribute to LineageOS, please visit our Gerrit Code Review. Your changelog is whatever was merged into gerrit.

    Bug reporting:

    Before the report make sure that you've installed the latest build of the ROM.
    Explain the bug in details and, if possible, methods to reproduce it.
    For most issues, you should attach the logcat.
    Random reboots? Please upload last_kmsg immediately after the kernel crash.

    Note: I will only be providing builds once every month and when new security patches come in. I don't have enough time to be making them every week. Latest build provided should have the June 2019 security patches. These builds should be pure Lineage based builds and they have not been tested so if you could give me feedback i would appreciate it. Please download the latest version of ARM64 OpenGapps and flash along with the ROM to be able to use the play store and other google related services. Also make sure you are using latest twrp recovery. If you want to root i recommend flashing and using Magisk 19.4. Enjoy and i hope you appreciate my pure Lineage 15.1 Unofficial builds for Flounder.

    Downloads:

    Latest 6/13 build for Flounder is here: https://www.androidfilehost.com/?fid=6006931924117894640
    ROM Download folder is here: https://www.androidfilehost.com/?w=files&flid=295480

    Sources:

    Device Tree: https://github.com/LineageOS/android_device_htc_flounder/tree/lineage-15.1
    Vendor Tree #1: https://github.com/TheMuppets/proprietary_vendor_htc/tree/lineage-15.1
    Kernel Tree#1: https://github.com/LineageOS/android_kernel_google_msm/tree/lineage-15.1
    Kernel Tree#1: https://github.com/LineageOS/android_kernel_htc_flounder/tree/lineage-15.1
    2
    Thank you for continuing the support of this device even when all the other devs moved on to newer, better devices.
    If testers are needed, i'm just one pm away
    2
    any android 10.0 rom for this tablet?

    Enviado desde mi Nexus 9 mediante Tapatalk
    No. We only just got an 8.1 ROM.
    1
    Crdroid Oreo for flounder is coming next:)
    1
    Crdroid Oreo for flounder is coming next:)

    Thank you so much for your kind words it really mean a lot to me:) I always love to at least try to make new ROMs for you all. Unfortunately i took apart my nexus 9 and i ended up breaking the motherboard so i can't test these ROMS but hopefully soon i will try to fix my nexus 9 and have it working again i just don't know when. So if you could test my ROMs and give me feedback i would appreciate it:)

    I just made crdroid oreo for flounder if you could test it would mean a lot to me:)

    You can download it here:

    https://forum.xda-developers.com/nexus-9/development/rom-crdroid-4-7-2-6-13-2019-t3939669

    Right away