[ROM][7.1.2][UNOFFICIAL][grouper] CM14.1 for Nexus 7 2012

TureX · Mar 27, 2020

*** Disclamer

By downloading and installing this ROM you agree that you do so at
your own risk, and that you understand that it probably voids your
warranty. (But does anyone still have an active warranty on this 2012
device?)

Introduction

And yet another cyanogenmod/lineage os build, compiled with linaro gcc for better optimization. Don't ask for tilapia is just for grouper

Installation instructions
Back up your data and previous ROM with last TWRP
Download from link below.
Wipe system, cache, dalvik.
Also wipe data unless you are coming from another rom
Install the ROM.
Optionally install opengapps arm for 7.1.2 , but i suggest to use microg
Reboot.
WAIT for system to settle before you decide it is slow. Some of the app optimization which used to happen during initial boot now seems to happen in the background. When it's finished, responsiveness will improve.
Also i suggest to disable adaptive brigtness, live display,ambient display for better performance.
Optionally root with Magisk

I suggest to format cache and data with f2fs file system

Source : https://github.com/turex

Credits / Thanks
Google / AOSP
CyanogenMod
@AndDiSa for AOSP 7.1 -- I use his kernel tree and device tree with little modification
@Clamor - for his work in Unlegacy
@Ziyann - for his work in Unlegacy
@unlegacy-Android team - for kernel and tree

XDA

evDB Information
Unofficial CM14.1 for Nexus 7, ROM for the Nexus 7

Contributors
AndDiSa, TureX

ROM OS Version: 7.1.2 Nougat
ROM Kernel: Linux 3.1.10
Based On: CyanogenMod

Version Information
Status: Stable

Created 2020-03-27
Last Updated 2020-04-16

TureX · Mar 27, 2020

Download

Last build :
14/06/2020
Changelog :
change kernel branch (using @AndDiSa 7.1.0 stable)
add signature spoofing switch on settings
june security patch

noobpc__ · Mar 28, 2020

Let's flash this Rom now!
Thank you very much!
(I use Google Translate.)

Deleted member 5367514 · Mar 29, 2020

I flashed this ROM (clean flash) just to try it out - it's really smooth and responsive, I like it. I flashed Magisk for root, again no problems

A note to others; there's not enough space to flash Gapps (even Pico) so I don't know if there's a way to install Gapps.

I've not used MicroG before and I could not get it to work fully. That is, I could install apps (via Aurora Store) but there were some apps (like Authy, BlueMail and Skype) that said they needed Google Play Services. Maybe I did something wrong? Or missed something out?

I wasn't sure what I needed to do tbh and I didn't know what I needed in terms of components. First time, I installed microg through Magisk - it installed ok but it wasn't right (I think I needed more components). So I clean flashed the ROM and Magisk again and installed microg (NanoDroid-micgroG-22.6) via TWRP. Again, it flashed but some apps wouldn't run, needing Google Play Services.

The microG settings 'self check' suggests everything isn't right - the 'Play Services (GmsScore) has correct signature' option is not checked. I checked it (even though it was not advised) but those apps still didn't run.

This seems to be a really good ROM, and I really would like to try it out fully, so I liked to be able to fix this problem. Some apps, I can do without and find replacements (Skype for instance) but I do need Authy to work.

TureX · Mar 29, 2020

Hi, for microg i use this sequence:
1) clean flash the rom, after that reboot to the system.
2) reboot to twrp and flash magisk, reboot to system.
3) download nanodroid microg (i don't know if i can post the link)
4) reboot to twrp and flash nanodroid microg zip and reboot
5) open microg settings and give all permissione on self check
6)open aurora store and give the permissions.
7) now phonesky some times does not acquire the right permissions so there are 2 ways to fix

7.1) throught adb :
Connect the tablet with a cable to a PC in mtp mode(Will appear on the tablet when you connect to PC) open a terminal and insert this commands
adb shell
Su
pm grant com.android.vending android.permission.FAKE_PACKAGE_SIGNATURE

7.2) throught local terminal
Go ti settings ,about tablet, tap 7 times to build Number for enable developer settings. Go back to settings and scroll down to developer settings. Go in and enable local terminal. Open local terminal(Is an app) give root permission and Copy this commands.

Su
pm grant com.android.vending android.permission.FAKE_PACKAGE_SIGNATURE

Sorry for my english ,ask for any problem

Deleted member 5367514 · Mar 29, 2020

Thank you for the help. I made some progress. I reflashed the ROM clean, and followed your procecure then thru adb...

TureX said:
Su
pm grant com.android.vending android.permission.FAKE_PACKAGE_SIGNATURE

phonesky does now acquire the right permission ("has correct signature" is checked) but I still get the message app "won't run without Google Play services, which are not supported by your device" error.

I've attached a screen shot of the microG self-check results.

TureX · Mar 29, 2020

LesGirauds said:
Thank you for the help. I made some progress. I reflashed the ROM clean, and followed your procecure then thru adb...

phonesky does now acquire the right permission ("has correct signature" is checked) but I still get the message app "won't run without Google Play services, which are not supported by your device" error.

I've attached a screen shot of the microG self-check results.

tap on unchecked box for grant permission, let me know if it work

Deleted member 5367514 · Mar 29, 2020

TureX said:
tap on unchecked box for grant permission, let me know if it work

Yes, that works! Thank you :good:

Last time, it gave a message saying it was 'not advisable' but this time it was ok - so all is good.

I'll carry on with my testing. I think I'm going to have to replace some of the google apps (mail, maps, calendar) because of the sync process - I'm not sure sync will work.

TureX · Mar 29, 2020

Nice to see it works! i will try to remove some systems usefull apps for make space for gapps, another alternative is install old gapps that are less 100 MB. I also will try give more optimize to the rom with a newest linaro and disable pmf that cause some wifi problem on connect on some access point

Deleted member 5367514 · Mar 29, 2020

Yes it works - it works very well indeed. It's really responsive and smooth.

It would be good to have the option of installing gapps (for those that want it) I've never used microg before so I'm happy to play with that for the moment. I don't want my google account locked (because I have app purchases on my account) so I am trying to keep accesses to Google to a minimum.

I'll look for a gapps package (older or otherwise) that's below the space left available by the ROM. When I instal a ROM, I do use a root app deleter to remove unwanted/unneeded apps but that doesn't gain that much space - so anything you can do would be great!

TureX · Mar 29, 2020

New update online, give me a feedback. I add in OP a link to opengapps that i test,after install throught TWRP you MUST give all the permission to the play store and play service throught settings>app

Deleted member 5367514 · Mar 30, 2020

Excellent work @TureX ! I've tested your ROM with microg and it's working really nicely.

I found some issues for some aps with microg (Google aps primarily) but this is not a fault of your ROM nor your implementation of microg. These are known limitations of microg and, because of what microg does and how it works, to be expected. I could not get contacts and calendar syncronisation working (though there are instructions elsewhere on how to do it, it didn't work for me) so I'm adandoning microg in favour of gapps. As a longer term aim, I want to find a non-Google solution for contacts and calendar sync across a number of platforms - but that's something for me for the future!

So I started my testing for gapps - I cleaned flashed the ROM with magisk no problems, then I tried to flash the gapps package you provided a link to but got an error...

"set_metadata_recursive: some changes failed" and error 7

This seems a bit strange to me since I think it relates to the recovery image (I'm using TWRP 3.3.1-0) rather than the gapps package, though the fact it is an older package might have something to do with it. I'm going to research a bit, just out of interest!

Edit: I may have solved the problem. The gapps zip flashes ok if you don't reboot after flashing the ROM.

noobpc__ · Mar 30, 2020

Thank you for TureX, great rom!
If you can, add Alucard Governor.
Since I am a beginner, I could not compile the source kernel.

(I used Google translate)

TureX · Mar 30, 2020

LesGirauds said:
Excellent work @TureX ! I've tested your ROM with microg and it's working really nicely.

I found some issues for some aps with microg (Google aps primarily) but this is not a fault of your ROM nor your implementation of microg. These are known limitations of microg and, because of what microg does and how it works, to be expected. I could not get contacts and calendar syncronisation working (though there are instructions elsewhere on how to do it, it didn't work for me) so I'm adandoning microg in favour of gapps. As a longer term aim, I want to find a non-Google solution for contacts and calendar sync across a number of platforms - but that's something for me for the future!

So I started my testing for gapps - I cleaned flashed the ROM with magisk no problems, then I tried to flash the gapps package you provided a link to but got an error...

"set_metadata_recursive: some changes failed" and error 7

This seems a bit strange to me since I think it relates to the recovery image (I'm using TWRP 3.3.1-0) rather than the gapps package, though the fact it is an older package might have something to do with it. I'm going to research a bit, just out of interest!

Edit: I may have solved the problem. The gapps zip flashes ok if you don't reboot after flashing the ROM.

Thank you ,i would to know if you noticed some performance improvements in the new update and if wifi Is stable.

Reguarding cpu governors, i don't know if i will add new one, i will add a TCP congestion algorithm to try to improve wifi speed.

Deleted member 5367514 · Mar 30, 2020

Everything seems to work perfectly :good:

Gapps installed ok (permissions were all set and I didn't need to change them) I've re-installed all my apps and they are working and responsive.

This ROM is excellent, as good as AndiDiSa's AOSP for speed and responsiveness. CM gives a few more configuration options than AOSP so I will stick with this for a while, just to some more testing for reliability, battery life, etc.

I'm really impressed Turex, it's a really good ROM, well done! :good:

TureX said:
i would to know if you noticed some performance improvements in the new update and if wifi Is stable

Sure thing! So far, WiFi is stable and performance is good. I'l keep you posted

TureX · Apr 8, 2020

Hello! I'm testing new CPU governors , at the moment I'm testing pegasusq ,let me know if you want some specific and if you want test this build. I will release a build when I can merge April security patch .

HaRdC0r3 · Apr 8, 2020

I'd like to see BBR, Vegas, Cubic, and Westwood+ for tcp...for I/O I'd like to see maple, zen, deadline, noop, cfq, bfq, fiops, sioplus...for govs interactive, ondemand, nightmare, impulse, darkness...with that said if probably end up using Westwood, deadline, and interactive or maybe bbr, maple, and darkness if it worked well.
These are suggestions and if you add any I'd be thankful and if you don't I'm still happy you put this out for us to use!

Big thank you for spending time on this project!

TureX · Apr 8, 2020

HaRdC0r3 said:
I'd like to see BBR, Vegas, Cubic, and Westwood+ for tcp...for I/O I'd like to see maple, zen, deadline, noop, cfq, bfq, fiops, sioplus...for govs interactive, ondemand, nightmare, impulse, darkness...with that said if probably end up using Westwood, deadline, and interactive or maybe bbr, maple, and darkness if it worked well.
These are suggestions and if you add any I'd be thankful and if you don't I'm still happy you put this out for us to use!

Big thank you for spending time on this project!

I Just enabled Westwood TCP , pegasusq isn't working well i Will see for other but i think that the original One Is optimized very well.

johndaog · Apr 12, 2020

Great Rom for Grouper

I like this rom very much
it is almost perfect
I just want to use proper Gapps with it.
So I will wait for a final release.

TureX · Apr 12, 2020

johndaog said:
I like this rom very much
it is almost perfect
I just want to use proper Gapps with it.
So I will wait for a final release.

Hi, you can use old gapps posted in the op for builds before 11\04 , now you could be able to install last gapps on 11\04 build but Is a Little bit bugged.

[ROM][7.1.2][UNOFFICIAL][grouper] CM14.1 for Nexus 7 2012

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