[ROM][NZH54D][2021/01/05][Asus Nexus 7 2012 WiFi/3G][F2FS/EXT4]Android 7.x AOSP

yuto0214w

New member
Jan 20, 2019
2
0
11
Shizuoka
me.yuto0214w.repl.co

BeeJ1109

Senior Member
Sep 26, 2015
133
35
48
Adelaide
I've just updated the OP with the links to the latest version so it should be more easy now to find the latest version.
In addition I've added the links to TWRP 3.5.0 for Grouper/Tilapia. Many thanks to the TeamWin project for still supporting Grouper and Tilapia and to @dark0shark for giving me the hint and beeing the early bird in testing it.
Hi AndDiSa,
Have been using Tilapia latest Jan ROM Build since release, after installing ROM a month ago. Latest TWRP 3.5 updated from 3.4.
Suddenly battery from fully charged, just sitting not used, battery fully discharge overnight. Tried several times over last couple of days, same discharge rate.
Where as Prior Nov Release ROM & TWRP 3.4. Battery lasted a few days.

Any ideas. I could roll back ROM or TWRP separately to find out what is causing issue.

Another point, you do not save recovery partition in your TWRP. WHY???
Also Magisk Root needs reinstalling, after BOOT partition is being updated with new Latest ROM Dirty Flashed.
Other Ops TWRP Versions being 3.4 and later 3.5 Backup both Boot and Recovery Partitions.

Another issue I cannot use TWRP Helper v1.0 to save internal memory, photos or downloads are not saved. Gives me failure result on trying to install via Magisk Module Download options. Fault code is 123.

Any ideas.

Thanks again for your effort to keep the old Nexus 7 3G tablet going.
Cheers
BeeJ1109
 

AndDiSa

Senior Member
Dec 2, 2009
3,460
4,517
268
Heidelberg
@BeeJ1109 I don't think that TWRP 3.5 has an influence on battery discharging rate, but I have a few questions to you:
  • is the discharging rate constant, or does is drop suddenly?
    in the first case you should have a look at Google synchronizing services. I had several times the issue that if for whatever reason synchronization is failing battery drains very fast
    In the second case it might be that your battery is no longer at the top. One or two cells might be broken and due to that the voltage suddenly drops and the device switches off
  • What do you mean with "your" TWRP? TWRP is a custom recovery built / maintained by the TeamWin Recovery Project, it's not related to the ROM itself and you are free to install a different version than the one which is suggested in the OP
Regarding Magisk you need to consider that the latest versions are focussing on Android >= 8.x so there is a big chance that not all of the functionality is available on / compatible with Android 7.x
 

MacLeod100

Senior Member
Nov 28, 2013
157
45
48
Malmö
Hi AndDiSa,
Have been using Tilapia latest Jan ROM Build since release, after installing ROM a month ago. Latest TWRP 3.5 updated from 3.4.
Suddenly battery from fully charged, just sitting not used, battery fully discharge overnight. Tried several times over last couple of days, same discharge rate.
Where as Prior Nov Release ROM & TWRP 3.4. Battery lasted a few days.

Any ideas. I could roll back ROM or TWRP separately to find out what is causing issue.

Another point, you do not save recovery partition in your TWRP. WHY???
Also Magisk Root needs reinstalling, after BOOT partition is being updated with new Latest ROM Dirty Flashed.
Other Ops TWRP Versions being 3.4 and later 3.5 Backup both Boot and Recovery Partitions.

Another issue I cannot use TWRP Helper v1.0 to save internal memory, photos or downloads are not saved. Gives me failure result on trying to install via Magisk Module Download options. Fault code is 123.

Any ideas.

Thanks again for your effort to keep the old Nexus 7 3G tablet going.
Cheers
BeeJ1109
About battery ...I was having the same problem . Order a new one from ebay ( come from somewhere in Spain ) and problem solved !
 

JesseKnows

Member
Nov 24, 2011
18
8
23
I started with the official Android 5.1.1. Performance was unbearably slow.
I unlocked bootloader, and installed TWRP 3.5.0_9-0.
When wiping partitions I get the error
"failed to mount ./data (invalid argument)"
After going ahead and installing AOSP from the link I get the same error as well as
"Unable to mount storage"

After completing the install I rebooted. I see the unlocked bootloader splash screen, then the "android" text with left to right fading gray scroll. That seems to be stuck forever.
 
Last edited:

MacLeod100

Senior Member
Nov 28, 2013
157
45
48
Malmö
I am following the instructions in OP. I unlocked bootloader, and installed TWRP 3.5.0_9-0.
When wiping partitions I get the error
"failed to mount ./data (invalid argument)"
After going ahead and installing AOSP from the link I get the same error as well as
"Unable to mount storage"

Should I be concerned?
I don't remember exactly but a long time ago was having the same problem.
I remember that i ignore the message and tablet was working fine .
 

JesseKnows

Member
Nov 24, 2011
18
8
23
I started with the official Android 5.1.1. Performance was unbearably slow.
I unlocked bootloader, and installed TWRP 3.5.0_9-0.
When wiping partitions I get the error
"failed to mount ./data (invalid argument)"
After going ahead and installing AOSP from the link I get the same error as well as
"Unable to mount storage"

After completing the install I rebooted. I see the unlocked bootloader splash screen, then the "android" text with left to right fading gray scroll. That seems to be stuck forever.
Replying to my own question:
I followed the instructions here (found by searching for 'twrp "failed to mount ./data (invalid argument)"') to reformat the /data partition. That overcame the error. Subsequent installation of AOSP and gapps succeeded and my Nexus is booting to 7.1.2!.
The responsiveness is overwhelmingly better than the 5.1.1 (which was unusably glacial).
 

AndDiSa

Senior Member
Dec 2, 2009
3,460
4,517
268
Heidelberg
New versions with security patches for February 2021 are available for testing

Hi guys,

I've just updated my Github-repos to the latest version of the ROM having the security patches for February 2021 applied to it. Here are the OTA-packages for Grouper and Tilapia:

7.1.2 Grouper OTA-Package 20210213 md5: a2df9719f81967ebde84f9993b8af95e
7.1.2 Tilapia OTA-Package 20210213 md5: 819e8425b972bbebe5d63670c854e759

As always, please note, that these versions are untested. I'll wait for some feedback from the community before I'll update the OP.

Have fun and stay healthy!
 

Hagemanto

Member
Dec 30, 2020
8
1
13
Italy
Hi people, I need help. I used my nexus with no matter for months, last update was December one, so far no matter. Suddenly yesterday happened that I left tablet on my desk, half an hour later it was off (or frozen?), so I rebooted but froze immediately, after that didn't boot at all. I tried to reinstall rom, I formatted system and cache and reinstalled, nothing. Stuck on android logo. What else can I try? Thanks in advance
 

AndDiSa

Senior Member
Dec 2, 2009
3,460
4,517
268
Heidelberg
If you can boot to recovery you could e.g. get

cat /proc/last_kmsg

in recovery mode which should dump the kernel messages from your last boot.
Better / in addition connecting the device to a PC over usb while it boots and getting the logcat with

adb logcat | tee log.txt

Beside showing the log it gets written to log.txt, too.

Commands working on Linux having ADB drivers installed and ADB enabled on your device.
 

Hagemanto

Member
Dec 30, 2020
8
1
13
Italy
Ok, I finally restored the stock rom and returned to this one. It seemed to be ok until I installed Google apps (chrome, maps, gmail, etc). While using one of these, tablet froze. I erased each google app but play store, now seems to be ok (just one episode while using play store). I do t know the reason, but since it works it's ok
 
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Hagemanto

Member
Dec 30, 2020
8
1
13
Italy
No, not true. 12 hours later it's freezing again, randomly, sometimes while booting, sometimes while I'm using (surfing on firefox, checking settings, no matter what I'm doing). I will try to keep on stock rom, to understand if it's a hardware matter or else
 

DumF0rGaming

Recognized Translator
Jan 8, 2013
802
666
123
Dubai
Google services are such a cancer, not a single 1Gb RAM device can handle them anymore. I can strongly suggest to use microG and related alternatives like Aurora store and NewPipe
 
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metterschling

Senior Member
Sep 29, 2013
141
99
48
Google services are such a cancer, not a single 1Gb RAM device can handle them anymore. I can strongly suggest to use microG and related alternatives like Aurora store and NewPipe
+1 here, Grouper is significantly more responsive with MicroG than with Gapps. Nevertheless I would anyway always prefer it due to privacy reasons. A distribution like Nanodroid makes it even easy to get Play Store installed in case you depend on in-app payments.
 
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Hagemanto

Member
Dec 30, 2020
8
1
13
Italy
Thanks for the answers, people. Sadly, I think my tablet is broken. As I was working on it, trying microg and setting it up, it kept freezing, at reboot didn't go past google logo screen, I tried many times to get to recovery mode screen but it was stuck at the splash screen of twrp. I tried to flash with wug, but also during this it stopped working, failing the operation. I gave up, I really think this is the end for my beloved Nexus 7
 

dark0shark

Senior Member
Feb 17, 2013
246
154
73
Hamburg
New versions with security patches for February 2021 are available for testing

Hi guys,

I've just updated my Github-repos to the latest version of the ROM having the security patches for February 2021 applied to it. Here are the OTA-packages for Grouper and Tilapia:

7.1.2 Grouper OTA-Package 20210213 md5: a2df9719f81967ebde84f9993b8af95e
7.1.2 Tilapia OTA-Package 20210213 md5: 819e8425b972bbebe5d63670c854e759

As always, please note, that these versions are untested. I'll wait for some feedback from the community before I'll update the OP.

Have fun and stay healthy!
Grouper ROM installed, Nexus 7 alive and kicking.
Screenshot_20210214-114214.png