Download and Install Lineage OS 16 on Nexus 9 – flounder

  

LineageOS Forums Google Device Forums Nexus 9 – flounder Download and Install Lineage OS 16 on Nexus 9 – flounder

This topic contains 22 replies, has 8 voices, and was last updated by  Davide Franzino 2 months ago.

 
 
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  • #43653

    shibaa987
    Keymaster

    Good news. You can now download and install Lineage OS 16 for Nexus 9. Here is how to install LineageOS 16 on Nexus 9, with a step-by-step guide.

    Follow the links to get other Lineage OS 16 and Android Pie ROM builds.

    This Nexus 9 Lineage OS 16.0 build is brought to you by developer HashBang.

    DONATION TO DEVELOPER(S)/PROJECT:

    If you like this ROM then do consider for a contribution to HashBang and Lineage OS project:
    Donate to LineageOS project
    – No donation link found for HashBang

    DISCLAIMER:
    THIS IS AN INITIAL BUILD OF Nexus 9 LINEAGE OS 16 WHICH MAY HAVE MINOR BUGS.
    MAKE SURE TO BACKUP ALL DATA OF YOUR PHONE.
    FLASH AT YOUR OWN RISK.

    Installing a custom ROM may require an unlock bootloader on Nexus 9, which may VOID your warranty and may delete all your data. Before proceeding further you may consider backup all data on the phone.
    You are the only person doing changes to your phone; neither the developer nor I can be held responsible for the mistakes done by you.

     

    Download Lineage OS 16 for Nexus 9 - flounder
     

    Status of Nexus 9 Lineage OS 16.0 – Android 9 Pie ROM:

    WHAT’S WORKING:
    – Unknown

     

    KNOWN ISSUES:
    – Unknown

    REQUIRED GUIDES AND DOWNLOADS TO INSTALL LINEAGE OS 16 ON Nexus 9:

    HOW TO DOWNLOAD AND INSTALL Lineage OS 16.0 ON Nexus 9 – Android 9 Pie CUSTOM ROM:

    Following are the two sub-sections of this Lineage OS 16 guide:

    1. First time installation of Lineage OS 16 on Nexus 9
    2. Upgrading Lineage OS 16 on Nexus 9 from a previous build of Lineage OS 16 ROM

    Follow this if you are flashing Lineage OS 16 on Nexus 9 for the first time, or coming from another ROM:

    Points to NOTE:

    • Try to avoid restoring apps backup using Titanium Backup. It may break things up.
    • Don’t restore system data using Titanium Backup! It will definitely break the current installation.
    • It is also discouraged to Restoring Apps + Data using Titanium Backup.

     

    1. Download and Copy the Lineage OS 16 Gapps and the Nexus 9 Lineage OS 16 Android Pie ROM ZIP file to your phone.
    2. Boot into the TWRP custom Recovery to install this Lineage OS 16.0 on Nexus 9.

      Make sure to have a Custom recovery like a TWRP recovery or any other custom recovery.
      – If not then download the TWRP recovery from Downloads link and follow the Custom Recovery Installation Guide (it’s a generic guide which will work for TWRP as well as any other recovery)

    3. Wipe the data partition (or do a factory reset), Cache partition, Dalvik Cache or ART cache and Format the System partition.

      – Here is a guide explaining how to wipe using TWRP recovery.

      This will delete all your data on your phone. You may consider complete backup of your phone data or take a NANDROID backup of the current ROM
      How to backup all data on your Android Device
      how to take NANDROID backup using TWRP recovery

    4. Install the Nexus 9 Lineage OS 16 ROM file that you have copied into the phone.

      – Here is a post explaining how to install Lineage OS

    5. Then install the Android Pie MindTheGapps for Lineage OS 16 package.

      – Here is a post explaining how to install GApps using TWRP recovery.

    6. Reboot and Enjoy the Android 9 Pie Lineage OS 16 on Nexus 9.

    Upgrading from earlier version of Lineage OS 16 on Nexus 9 (flounder):

    1. Copy the latest ROM zip file of Lineage OS 16 for Nexus 9, Lineage OS 16 GApps and/or Magisk ROOT package to the phone
    2. Boot into Recovery.- Make sure you have a latest custom Recovery that should be able to flash the Lineage OS 16 ROM update.
    3. Format or wipe the system partition from the custom recovery menu.
    4. Install the Lineage OS 16.0 ROM for Nexus 9.

      – Here is a post explaining how to install Lineage OS

    5. Reboot and see you have the GApps and ROOT access or NOT.

      – Gapps is built in such a way that it will sustain across ROM updates.

    6. If you don’t have GApps after upgrading the Lineage OS 16 on Nexus 9, then flash the GApps.

      – Here is a post explaining how to flash GApps using TWRP recovery.

    7. If you don’t have ROOT after upgrading the Lineage OS 16 on Nexus 9, then flash the SuperSU or Magisk or the Lineage SU binary.

      – Here is a post explaining How to Enable ROOT on Lineage OS 16 ROM

    8. Once everything is done, reboot and Enjoy the Lineage OS 16.0 on Nexus 9.

    Complete the initial setup and enjoy Android 9 Pie with Lineage OS 16 on Nexus 9.

    After installing Lineage OS 16 on Nexus 9 you may want to enable ROOT access on your phone and here is how you can do that:
    Lineage OS 16 ROOT.

    If there is no ROOT access for some reason even after installing the LineageOS SU binary, then you can try SuperSU rooting guide to enable ROOT access.

    Stay tuned or Subscribe to the Nexus 9 (flounder) Lineage OS forum For other Android Pie, Android Oreo ROMs, Nougat ROMs, or other ROMs and all other device specific topics.

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    #44258

    Timi Fadiran
    Participant

    It’s been a while since I tried to install a custom ROM on any device, so I probably should not have jumped back in right into Lineage 16 on my nexus 9, but I gave it a shot and I’m a bit stuck now

    I flashed the ROM and on the first boot I got the “To start android, enter your password” screen. I saw people were saying type in “deafault_password” to get through this, but the system was freezing after a few seconds. The next solution I saw was to Format Data using TWRP.

    Now when I boot, the system freezes as shown in the attached image.

    Now when I return to TWRP I get a “Mount Decrypt Data” “Enter Password” screen. I’ve been hitting cancel and I have tried formating the data again in TWRP, but that doesn’t help.

    I thought I might sideload a different custom OS, but ADB sideload also isn’t registering.

    Any thoughts? Thanks.

    Edit: I was able to go down to lineage os 15. Wanted to delete this post but can’t see that option. Thanks.

    Attachments:
    #44405

    cblx5
    Participant

    Hi,

    Just tried this ROM ( from flounder 15.1 ) and it reports ERROR 7 while installing.

    Any tips?

    Thanks

    #44472

    shibaa987
    Keymaster

    It could just be a TWRP issue.
    Can you tell me what is the TWRP version are you using and is it an OFFICIAL or unofficial TWRP build?

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    #44483

    cblx5
    Participant

    Hi,

    Its TWRP 3.0.2-1 and I assume it is official, I just downloaded it from the TWRP list and was the latest at the time about a year ago. I have installed most Lineage 15.1 ROMs with it.

    After wiping all but “Internal Storage”, I then proceed to install the ROM and get ERROR 7 within a few seconds.

    Thanks

    #44484

    shibaa987
    Keymaster

    After that there might be many changes, so it is always recommended to try with new TWRP.
    I see the new TWRP for Nexus 9 is somewhat 3.2.3-0 or so.

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    #44513

    cblx5
    Participant

    Now using flounder TWRP 3.2.3-0 and the ROM loaded and I rebooted.

    After displaying the Lineage boot up sequence.. (3 circles)

    I am presented with a screen saying “To start Android, enter your password”

    and a keyboard, but then everything is locked up. I do not have a password !!!
    (Have not loaded any GAPPs as yet)

    Edit: After two ‘Factory Reset’s the keyboard was responsive for a few seconds, I managed to type in a random password, but then am told unsuccessful and need to do a factory reset and it all repeats. If I do not type anything in first second the keyboard locks up. The Nexus make a thumping sound once or twice just after boot up.

    #44606

    Timi Fadiran
    Participant

    The same thing happened to me. It would give me a few seconds to type then freeze. I saw people saying type in “deafault_password” to get through this, but the system was freezing after a few seconds.

    The next solution I saw was to Format Data using TWRP. That got me past the password screen, but the device would freeze on the home screen shown in my original post. Also, at this point when I would return to recovery I would see a “Mount Decrypt Data” “Enter Password” screen. I would hit cancel and try formatting a few more times.

    The next thing I tried was flashing the rom rebooting into recovery and then flashing gapps before the first boot. This seemed to stop the freezing, but then I got an a continuous error that pixel set up had crashed. At this point I gave up and installed Lineage 15.1 instead.

    #44607

    cblx5
    Participant

    @ Timi
    Thanks at least the problems are consistent, I saw your first post and hence tried the password but only got to ‘f’. Maybe we should wait for next tip from shibaa987.

    #44713

    cblx5
    Participant

    Found this which gets rid of the password screen and Nexus fully boots up but is unresponsive to touch screen so is in effect locked up. Only Power off button works

    Boot into Twrp and under Wipe you’ll find FORMAT DATA, not wipe data.. Format the data and the rom will boot . Note that you’ll lose everything from you phone, so it’s good to save files on pc before, if you have something important..

    update — after further ‘hacking’ I now have a Nexus with only TWRP on it…… :-((((

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