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[ROM][NZH54D][2021/09/05][Asus Nexus 7 2012 WiFi/3G][F2FS/EXT4]Android 7.x AOSP

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gmsalomao2

Senior Member
Dec 25, 2014
235
60
Nexus 7
Google Pixel

Typing is super laggy when using the Notion app​

I want to use this tablet to type using a USB (OTG) keyboard. It works flawlessly with most apps, but when using Notion app it lags A LOT. I type and then I have to wait many seconds for the text to show up on the screen.

The same thing happens when using the on-screen keyboard.

I've made a post on Notion's SubReddit too because I think the problem is with the app itself. But since the problem does not happen on a newer device running Android 10, I wanted to rule out the ROM as the cause.

So @AndDiSa , do you think the ROM could be the issue?
 

AndDiSa

Senior Member
Dec 2, 2009
3,548
4,718
Heidelberg
@gmsalomao2 well as the lag happens with on-screen keyboard and usb keyboard I doubt that the reason is directly connected to the ROM. A logcat would be helpful to see whether there are e.g. exceptions thrown during the use of the application.
Edit: I just had a look at the reviews of the app in Google Play store ... it looks to me as if you are not the only one who is experiencing lags when using the app.
 
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gmsalomao2

Senior Member
Dec 25, 2014
235
60
Nexus 7
Google Pixel
@gmsalomao2 well as the lag happens with on-screen keyboard and usb keyboard I doubt that the reason is directly connected to the ROM. A logcat would be helpful to see whether there are e.g. exceptions thrown during the use of the application.
Edit: I just had a look at the reviews of the app in Google Play store ... it looks to me as if you are not the only one who is experiencing lags when using the app.
I see. Thank you AndDiSa. Yes, that's probably the app. I'm relieved to rule out the ROM 🙏
 

AndDiSa

Senior Member
Dec 2, 2009
3,548
4,718
Heidelberg
New Versions 7.1.2 (2021-09) with several changes are available

Hi guys, I picked up a bit of pace and beside adding the new security patches for September 2021 I added a bunch of kernel patches, especially CVE-patches mitigating potential security issues.
In detail I did the following modifications / improvements:

  • I fixed the crash of the clock application reported by @momentoid
  • I added a missing patch for external/sqlite
  • I applied the security fixes for September 2021
  • I optimized the kernel config settings, especially removed some superflouus settings
  • I applied / backported a bunch of CVE-kernel patches. Please have a look at the sources in Github to see the whole list of changes
The full list of changes you can find in my Github repos

Regarding the wpa_supplicant.conf changes it looks to me that there is some other modification / setting needed. A few days ago I updated my router to OpenWRT 21.02 (which has the build-in possibility to enable WPA3) and I noticed connection issues when I was using WPA3 or WPA2/WPA3 in parallel. Even setting pmf=0 in /data/misc/wifi/wpa_supplicant.conf had no effect as it was overwritten immediately as soon as I was switching on WiFi. Only switching back to WPA2 only resolved the issue for me. I'll further analyze the WPA3 compatibility issue and I will see whether I can find improvements here.

The "standard" versions for Grouper / Tilapia are available for download:
aosp_grouper-7.1.2-ota-20210917.eng.ds.zip (MD5: e0381d56f4f1c11c095a9d0057c50699)
aosp_tilapia-7.1.2-ota-20210917.eng.ds.zip (MD5: 7a6b6d37b2f8ee5964c8d9164305a846)

as well as the MicroG-Patched images:
aosp_grouper-7.1.2-mg-ota-20210917.eng.ds.zip (MD5: 9ea020054cfbe1b646e1c9cdcb11358d)
aosp_tilapia-7.1.2-mg-ota-20210917.eng.ds.zip (MD5: 617fbfddc39174fcc0486de8081448e7)

I quickly tested the ROM and didn't find issues, nevertheless I will wait for feedback from the community before I'll add the new version to the OP.

If you report a successful (or unsuccessful :)) installation, please note which version (Grouper / Tilapia, with or without MicroG-patch) you have installed and tested. Thank you very much!
Stay safe!
 

momentoid

Member
Feb 7, 2011
16
16
New Versions 7.1.2 (2021-09) with several changes are available
Successfully installed September (2021-09) ROM on Grouper without MicroG patch and May 13 version of GApps (Arm / 7.1 / Pico). Works great. Thanks @AndDiSa, the World times in Clock app works, too. 😎

Notes:
- Sep 18, 2021 GApps raised Error 70 ( similar to Jun, Jul, Aug ver.)
- Amazon Kindle 8.46.1.0 (1.3.248903.0) updated on Sep 13, 2021 fails to start. Error message asks to make sure the ROM is an official build. Unfortunately, I didn't open this version of Kindle with Aug ROM. The previous version of Kindle worked on Aug ROM.
- Google Play, GMail, Chrome, YouTube apps work.
 
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marty_bebop

Member
Oct 23, 2016
33
15
Grouper: September ROM MicroG, Magisk 23, Aurora Store.

One funny thing - USB debugging was turned off after installation, so the device did not show up in ADB from my PC. Had me going for a few minutes. I don't recall that happening before.

Anyway, all seems good. Very much obliged.
 
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yedektab

New member
Sep 21, 2021
2
0
New Versions 7.1.2 (2021-09) with several changes are available

Hi guys, I picked up a bit of pace and beside adding the new security patches for September 2021 I added a bunch of kernel patches, especially CVE-patches mitigating potential security issues.
In detail I did the following modifications / improvements:

  • I fixed the crash of the clock application reported by @momentoid
  • I added a missing patch for external/sqlite
  • I applied the security fixes for September 2021
  • I optimized the kernel config settings, especially removed some superflouus settings
  • I applied / backported a bunch of CVE-kernel patches. Please have a look at the sources in Github to see the whole list of changes
The full list of changes you can find in my Github repos

Regarding the wpa_supplicant.conf changes it looks to me that there is some other modification / setting needed. A few days ago I updated my router to OpenWRT 21.02 (which has the build-in possibility to enable WPA3) and I noticed connection issues when I was using WPA3 or WPA2/WPA3 in parallel. Even setting pmf=0 in /data/misc/wifi/wpa_supplicant.conf had no effect as it was overwritten immediately as soon as I was switching on WiFi. Only switching back to WPA2 only resolved the issue for me. I'll further analyze the WPA3 compatibility issue and I will see whether I can find improvements here.

The "standard" versions for Grouper / Tilapia are available for download:
aosp_grouper-7.1.2-ota-20210917.eng.ds.zip (MD5: e0381d56f4f1c11c095a9d0057c50699)
aosp_tilapia-7.1.2-ota-20210917.eng.ds.zip (MD5: 7a6b6d37b2f8ee5964c8d9164305a846)

as well as the MicroG-Patched images:
aosp_grouper-7.1.2-mg-ota-20210917.eng.ds.zip (MD5: 9ea020054cfbe1b646e1c9cdcb11358d)
aosp_tilapia-7.1.2-mg-ota-20210917.eng.ds.zip (MD5: 617fbfddc39174fcc0486de8081448e7)

I quickly tested the ROM and didn't find issues, nevertheless I will wait for feedback from the community before I'll add the new version to the OP.

If you report a successful (or unsuccessful :)) installation, please note which version (Grouper / Tilapia, with or without MicroG-patch) you have installed and tested. Thank you very much!
Stay safe!
thanks for the rom, my nexus 7 wifi alived but i have a problem with headphone,music comes only left side how can i fix that
 

AndDiSa

Senior Member
Dec 2, 2009
3,548
4,718
Heidelberg
For those who have issues with installing latest Gapps, you can try to copy the attached gapps-config files into the same directory where the gapps installation packages is copied
I.e. something like

/sdcard/open_gapps-arm-7.1-pico-20210922.zip
/sdcard/gapps-config-tilapia.txt
/sdcard/gapps-config-grouper.txt

and then try to start the installation again. Error 70 should be fixed.

Edit: I just added this hint to notes / FAQ in the second post of this thread.
 

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  • gapps-config-grouper.txt
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momentoid

Member
Feb 7, 2011
16
16
Notes:
- Amazon Kindle 8.46.1.0 (1.3.248903.0) updated on Sep 13, 2021 fails to start. Error message asks to make sure the ROM is an official build. Unfortunately, I didn't open this version of Kindle with Aug ROM. The previous version of Kindle worked on Aug ROM.
Update:
I uninstalled and reinstalled the above version of Amazon Kindle and it works.

@LesGirauds has a good suggestion. Do a clean install of Sep (2021-09) ROM.
 

dan20385

New member
Sep 23, 2021
3
1
Sorry to derail the thread, I literally just found my old nexus 7 tablet after who knows how many years. Is there a guide available to install the latest custom rom listed above? Appreciate any guidance, thanks!
 

momentoid

Member
Feb 7, 2011
16
16
Sorry to derail the thread, I literally just found my old nexus 7 tablet after who knows how many years. Is there a guide available to install the latest custom rom listed above? Appreciate any guidance, thanks!
Welcome!
We're on page 242 of this thread. Page 1 has detailed steps to install this awesome ROM.

Depending on the level of your knowledge links to the latest version, Sep (2021-09) ROM are posted on Sep 19, 2021, on this page. A few posts after the ROM links, there is a post with links for a Config file posted on Sep 22, 2021.

Hope this helps.
 

dan20385

New member
Sep 23, 2021
3
1
Welcome!
We're on page 242 of this thread. Page 1 has detailed steps to install this awesome ROM.

Depending on the level of your knowledge links to the latest version, Sep (2021-09) ROM are posted on Sep 19, 2021, on this page. A few posts after the ROM links, there is a post with links for a Config file posted on Sep 22, 2021.

Hope this helps.
Thanks for your response. After some playing around using WugFresh RTK, I think I have managed to do what is needed. Sorry for the silly question but after installing the GAPPS stuff, the Nexus 7 boots fine but is really slow and things such as Settings / GPlay aren't loading - is there anything I am missing? Thank you.
 

AndDiSa

Senior Member
Dec 2, 2009
3,548
4,718
Heidelberg
@dan20385 probably the device is still compiling / optimizing the applications and services in background. Wait a bit until compilation is finished then the device should be much more responsive. I noticed, too, that Gapps and Google services became bigger and bigger over the last time and especially on the first boot it takes a while until everything is compiled.
 

Top Liked Posts

  • 1
    New Versions 7.1.2 (2021-10) are available
    I was away from my Nexus 7 2012, and thus late to the party. But, successfully installed the October 2021 Grouper ROM and Oct 21 version of GApps. Everything works great. Thanks, @AndDiSa.
  • 7
    New Versions 7.1.2 (2021-10) are available

    Hi guys, a new release but only a few changes, i.e. the security paches for October 2021.
    The full list of changes, as always, you can find in my Github repos

    The "standard" versions for Grouper / Tilapia are available for download:
    aosp_grouper-7.1.2-ota-20211006.eng.ds.zip (MD5: b57ddee37bad03f59e2eff562076b027)
    aosp_tilapia-7.1.2-ota-20211006.eng.ds.zip (MD5: 65ea4ea189a41ec7792fb13a876157da)

    as well as the MicroG-Patched images:
    aosp_grouper-7.1.2-mg-ota-20211006.eng.ds.zip (MD5: d5d788b3fa735c3e57d9f0fb562e15f6)
    aosp_tilapia-7.1.2-mg-ota-20211006.eng.ds.zip (MD5: 643f8fdf2195c2395f788611578c108e)

    I quickly tested the ROM and didn't find issues, nevertheless I will wait for feedback from the community before I'll add the new version to the OP.

    If you report a successful (or unsuccessful :)) installation, please note which version (Grouper / Tilapia, with or without MicroG-patch) you have installed and tested. Thank you very much!
    Stay safe!
    3
    Sorry to derail the thread, I literally just found my old nexus 7 tablet after who knows how many years. Is there a guide available to install the latest custom rom listed above? Appreciate any guidance, thanks!
    Welcome!
    We're on page 242 of this thread. Page 1 has detailed steps to install this awesome ROM.

    Depending on the level of your knowledge links to the latest version, Sep (2021-09) ROM are posted on Sep 19, 2021, on this page. A few posts after the ROM links, there is a post with links for a Config file posted on Sep 22, 2021.

    Hope this helps.
    3
    I would advice to flash Magisk through TWRP right after dirty flashing the new ROM version instead of using the Magisk app. This has worked for me without any issue for numerous iterations now. If you do a clean flash, just reboot after flashing the ROM, then go back to recovery to flash Magisk.
    3
    ...The only thing you will loose (ime) is any apps that you have purchased through google - you cannot activate paid-for apps without gplay (and so the entire google framework)
    You can use Aurora Store to download paid apps if you log in via the same account that you have used to purchase those apps.

    If this is too much of a risk for you, there is a somewhat inconvenient workaround for apps that you have purchased via Play Store (not for all apps, but for some). Only thing you need is root plus a root file manager to grab those paid apk's from your /data directory and sideload them to your Google-free device.

    As said before, it works for some apps, but most of the paid apps are tied to your Google credentials and will check if Google services are available and if the correct account is logged in.
    2
    I finally found the time to upgrade from April build and I tried to flash the ROM only, no Micro-G, no GApps.
    I use the device like a monitor for my USB inspection camera so I don't need the G framework at all.
    I added 3 apps from apkpure (Endoscope, Nova 6 and Pixel icon pack) and...they work! :)

    The tablet is very fast and responsive. No more lags at all on the UI.
    Of course I would recommend this solution for those who have a very specific use of the device, like me.

    @AndDiSa do you think that resizing the System partition may help in keeping the device snappy using GApps? How could the difference between GApps and no-GApps be so dramatic?
  • 311
    This thread is about installing and using AOSP 7.x (Nougat) ROM for the ASUS Nexus 7 Grouper / Tilapia devices.

    Asus - Model names

    Grouper = Asus Nexus 7 2012 WiFi
    Tilapia = Asus Nexus 7 2012 3G


    Initial Setup Installation
    1. Update Recovery to TWRP 3.5.2-9 for Grouper resp. TWRP 3.5.2-9 for Tilapia
    2. Boot into Recovery
    3. Factory Reset (only needed if you are not already on Android 7.x AOSP)
    4. Install 7.1.2 Grouper OTA-Package (Build 20210917) (md5 :e0381d56f4f1c11c095a9d0057c50699)
      or
    5. Install 7.1.2 Tilapia OTA-Package (Build 20210917) (md5: 7a6b6d37b2f8ee5964c8d9164305a846)
    6. Reboot into recovery
    7. Install Open GApps (arm/7.1/pico)
      (if you have issues regarding the size of the GApps please refer to the next post)

    [*]To get root access, I suggest to use either Magisk (V21.4) and Magsik Manager (V8.0.7) the "old" version of Magisk, or the new unified Magisk (V23.0) which can be flashed by TWRP, too. Probably you'll need to rename Magisk-v23.0.apk to Magisk-v23.0.zip

    Do not install Magisk on initial setup as it might lead to issues. Start the ROM without having root access the first time and install Magisk in a second step.

    If you are already on Android 7.x AOSP, it's sufficient to do the follwowing steps:

    Update Installation
    • Boot into Recovery
      • Install 7.1.2 Grouper OTA-Package (Build 20210917) (md5 :e0381d56f4f1c11c095a9d0057c50699)
        or
      • Install 7.1.2 Tilapia OTA-Package (Build 20210917) (md5: 7a6b6d37b2f8ee5964c8d9164305a846)
      • Reboot into recovery
      • Install Open GApps (arm/7.1/pico)
      • Wipe cache/dalvik-cache (optional, but suggested)
      • reboot

    Important: For more detailed installation instructions please refer to the next post
    Important: First boot after upgrading will take a bit longer (stays on ANDROID) because of art optimizations

    flash and use on your own risk!


    CREDITS,
    AOSP/Google, LineageOS, Ziyann for setting up the Grouper-AOSP repository and his Unlegacy Android project, daniel_hk for some hints how to get the 3.1 kernel running with N, timduru for his work on the Asus Transformer, Timur Mehrvarz for his work on the tegra kernel, Francisco Franco for his kernel work in general

    Bugs:
    • please report

    Latest Changes
    • 20210917(AOSP 7.1.2)
      • I fixed the crash of the clock application reported by @momentoid
      • I added a missing patch for external/sqlite
      • I applied the security fixes for September 2021
      • I optimized the kernel config settings, especially removed some superflouus settings
      • I applied / backported a bunch of CVE-kernel patches. Please have a look at the sources in Github to see the whole list of changes

    Latest version with MicroG-patch applied to them:
    aosp_grouper-7.1.2-mg-ota-20210917.eng.ds.zip (MD5: 9ea020054cfbe1b646e1c9cdcb11358d)
    aosp_tilapia-7.1.2-mg-ota-20210917.eng.ds.zip (MD5: 617fbfddc39174fcc0486de8081448e7)


    Changelog
    Please refer to the changes found in the github repos

    All ota packages can be found here:
    AndDiSa ROM files repository

    Sources

    https://github.com/AndDiSa

    If you would like to build from the sources, you can do so by cloning and build from repositories:
    but please take in mind that you need to have some free space (>= 100 GB) and some time ...


    XDA:DevDB Information
    Android 7.x AOSP, ROM for the Nexus 7

    Contributors
    AndDiSa
    Source Code: https://github.com/AndDiSa?tab=repositories

    ROM OS Version: 7.x Nougat
    ROM Kernel: Linux 3.1.x
    Based On: AOSP

    Version Information
    Status:
    Stable

    Created 2016-09-23
    Last Updated 2021-03-05
    65
    Please note:
    • the system partition is already quite full which leads to the problem that gapps probably will not install correctly and that may lead to weired problems (apps closing / not showing up correctly / ...). I suggest to use the dynamic gapps package linked above. In addition I suggest you to erase the system partition completely before applying the OTA package
    • If you get "Error 7" when trying to flash the ROM directly after upgrading to TWRP 3.5.2-9, wipe the Boot, System and Cache partition and clean dalvik-cache, then re-boot to Recovery and try again (you will not loose any data as long as you do not wipe the Data partition).
    • If you get "Error 70" when installing GApps copy the attached gapps-config files into the same directory where the gapps installation packages is copiedI.e. something like

      /sdcard/open_gapps-arm-7.1-pico-20210922.zip
      /sdcard/gapps-config-tilapia.txt
      /sdcard/gapps-config-grouper.txt

      and then try to start the installation again. Error 70 should be fixed.

    Some additional hints
    • If you are in a bootloop which shows to Google logo again and again, it's sufficient to hold vol- while booting. The next bootloop will boot into bootloader.
    • If you are in a bootloop which shows the ANDROID splash screen continuusly, connect your device to your PC and enter
      Code:
      adb reboot bootloader
      After a few seconds the device should show up the bootloader screen
    62
    Hi guys,

    first of all I would like to thank all of you for your support you offered to me in the last days and I really feel honoured that so many of your would like to support / help me so that I am able to continue the development for the Nexus 7.
    I've got many offers for a "new" Nexus device from all over the world which I really didn't expect. I was really torn between continuing and stepping out. I've thought very much about pros and cons and it wasn't an easy decision especially if you get so much positive feedback. Thank you again!

    Finally I've decided to stop development for the Nexus 7 (at least for the moment). There are several other projects (not all of them related to Android) I've in mind and probably this now was a broad hint to start with something different. I've uploaded the sources of the ROMs latest version (inc. security patches for June 2019) to Github and tested together with @fidoedidoe whether all needed repos and changes are consistent and that one can build the ROM from those repos without the need of doing additional modifications or patches. The build should run smoothly after synchronizing everything. I will also support and help everybody who would like to step in and continue the builds.
    I know there are several people interested in building the ROM from sources. Probably there is someone (or probably even a group) who would like to continue ...
    Cheers,
    AndDiSa
    55
    2019/02/05 - release for Grouper and Tilapia uploaded

    I've just uploded the latest version of the ROM for Grouper and Tilapia. As always the Android security issues listed in the latest Android Security Bulletin are patched in this ROM.

    Beside that once again I've worked much on the kernel side. Some features are added (multiple binder devices, alarm timer device, ...) and some bugs have been fixed.
    I am still working together with @OlliWi on the slow charging issue which occurs from time to time. Even if I was able to get charging currents up to 1500mA while the device was connected to a charger, we still have the impression that the cable / charger detection needs to be improved. We are on it ...

    Those of you who are familiar with the installation process of the ROM can download directly from here, otherwise please first read the instructions in the OP

    7.1.2 Grouper OTA-Package (Build 20190209) (md5: 885e601a06a2104628a1e450b73f3a18)
    7.1.2 Tilapia OTA-Package (Build 20190209) (md5: 8e4c0e1955ecc0bb65a51582bb01f779)

    And finally as always: flash on your own risk ... ;)
    52
    New year ... new security fixes (2019/01/05)

    Hi guys,

    I've just uploaded a new version of the ROM for our beloved Nexus 7 (Grouper / Tilapia) having the January 2019 security fixed applied to it.

    Beside that I found a bug causing bootloops on initial install / after wiping dalvik. This was caused by zygote not having enough memory available to create the boot.jar on the fly. To fix this issue, I am doing a dex-preopt for the boot image on compile time now which leads to a slightly larger image but improves initial boot time a bit, too.

    To get more memory free on the /system partition, I debloated the ROM a bit, e.g. removed the Browser2, LegacyCamera, Music and Calendar apps as some of them even didn't work fully. There are several alternatives available in several stores which you can install if you need them. Probably most of you do not even notice that these apps were removed.

    Most changes were applied to the kernel. I tested the changes in the last 4 weeks but as I have a Grouper device only and I cannot test each functionality I cannot exclude that something doesn't work as expected. So please file a bug report (best with logcat and a meaningful bug description) if you find some unexpected behaviour and I will have a look at it.

    The most important fix here is probably the improved charging behaviour (many thanks to @OlliWi who provided with fruitful analysis and hints and pushed me to have a deeper look at this issue).
    To get a faster charging of the device, do not boot with a USB cable connected as this prevents the device to charge with more than 500mA (or at least disconnect and re-connect the cable after the device booted).

    I've updated the links in the OP, so you can download the latest version from there.

    Happy new year to all of you!