[Miscellaneous Android Development] vampirefo:
This thread is for Nextbook Ares 8 5.1.1

I don't have this device yet, [MENTION=8114384]Conan1201[/MENTION] has offered to send me one, once I get it, I can begin the process of dumping the tablet, pulling the firmware, root, then TWRP.

What I would like is everyone that has this tablet, to post their build.prop and boot.img for each version they have, I am trying to see what the pattern is that is causing some versions to lose sound yet others don't.

Anyway all posts related to Nextbook Ares 8 5.1.1, should be posted in this thread, helps to keep all related posts in one thread, right now 3 or 4 threads have people posting about Nextbook Ares 8 5.1.1, most of those threads have nothing to due with this tablet.

A lot of people are contacting me, after failed attempt of using [MENTION=289644]greatbal[/MENTION] instructions or backup, I have nothing to due with [MENTION=289644]greatbal[/MENTION], I did read his thread yesterday downloaded the backup he provided, unpacked it, and see that is for an entirely different device, His backup manufacturer Logitech.

It should be, manufacturer Yifang.

Yifang version is nxm890bap

Logitech version is ebm890bap

They indeed two different tablets, one might be able to port one version to the other, but just trying to use one version over the other would cause problems.

Anyway [MENTION=289644]greatbal[/MENTION] did let people know what version he had, and I believe if you had the same version [MENTION=289644]greatbal[/MENTION] had, you would have been fine, the differences in the hardware/software isn't [MENTION=289644]greatbal[/MENTION] fault.

Update 3-22-2017

I have received the tablet from [MENTION=8114384]Conan1201[/MENTION].

Below is a part of the build.prop, an important part is the last line ro.build.flavor, that was the fix for sound on my tablet.

# begin build properties
# autogenerated by buildinfo.sh
ro.hwversion.id=V3.0.1
ro.ota.version.id=V1.0.2
ro.git.version.id=520cd962040ded28926dfaf6e07385aac0420aca
ro.build.id=LMY47V
ro.build.display.id=V1.0.2.LMY47V.eng.midpublic.20160529.132930
ro.build.version.incremental=eng.midpublic.20160529.132930
ro.build.version.sdk=22
ro.build.version.codename=REL
ro.build.version.all_codenames=REL
ro.build.version.release=5.1.1
ro.build.version.security_patch=2015-11-01
ro.build.version.base_os=
ro.build.date=Sun May 29 13:30:49 EDT 2016
ro.build.date.utc=1464543049
ro.build.type=user
ro.build.user=midpublic
ro.build.host=mid
ro.build.tags=release-keys
ro.product.model=NXA8QC116
ro.product.brand=NextBook
ro.product.name=NXA8QC116
ro.product.device=NXA8QC116
ro.product.manufacturer=Yifang
ro.build.flavor=nxm890bap_e_jj_64-user

Ok, some back ground, I got the tablet today, I work out of town stay in a hotel, my wife brought me the tablet and a small Linux laptop.

Setup tablet, enable usb debugging, reboot to bootloader

adb reboot bootloader

Now unlock bootloader

fastboot oem unlock

the tablet is supposed to reboot into recovery and format itself, it didn't I gave it 3 or 4 minutes.

I manually reboot tablet.

Got boot screen up android down recovery

choosing down, I get boot image error, which means recovery partition is locked, due to oem unlock.

boot into bootloader

fastboot oem lock

now reboot recovery no problem.

so recovery partition is out.

This tablet can have a permanent TWRP recovery, only temp TWRP recovery for now, I pulled system, recovery.img, boot.img, fastboot.img,ESP.img.

I backed doored the device and in doing so lost sound, I was able to recovery sound by examining different boot.img and build.prop there is always a pattern just finding it sometimes is the *****.

The pattern ro.build.flavor

Update 3-23-2017

Ok, I put together a Linux / Windows package to let people backup their tablet, you should do this before you root device or anything else some people lost sound, restoring your backup made by this recovery will fix that.

This is for LInux

You need to already have your tablet setup with usb debugging enabled.

adb reboot bootloader

sudo ./fastboot oem unlock

sudo ./fastboot format userdata (note this is optional, you will lose everything on internal sdcard.)

sudo ./fastboot format cache

sudo ./fastboot.sh

on tablet volume down until you see RESTART BOOTLOADER

power

sudo ./trigger 4

wait for recovery to load will take several minutes.

do a backup to micro sdcard, don't backup data or cache as nothing is there, back up system recovery boot to micro sdcard

I am don't use windows much from memory the below should be correct, look over it if something needs to be changed let me know.

Note [MENTION=4821597]social-design-concepts[/MENTION] has a complete windows version of tethering twrp, you still need my files to switch bootloader, once that is done you can then use [MENTION=4821597]social-design-concepts[/MENTION] tool, or continue using below instructions.

This is for Windows

You need to already have your tablet setup with usb debugging enabled.

adb reboot bootloader

fastboot oem unlock

fastboot format userdata (note this is optional, you will lose everything on internal sdcard.)

fastboot format cache

fastboot flash ESP esp.img
fastboot flash fastboot droidboot.img

on tablet volume down until you see RESTART BOOTLOADER

power

Note if you are going to use [MENTION=4821597]social-design-concepts[/MENTION] windows tool use it now, else continue with my instructions.

fastboot flash /tmp/recovery.zip recovery.zip
fastboot flash /tmp/recovery.launcher recovery.launcher
fastboot oem start_partitioning
fastboot flash /system/bin/logcat recovery.trigger.new
fastboot oem stop_partitioning

wait for recovery to load will take several minutes.

do a backup to micro sdcard, don't backup data or cache as nothing is there, back up system recovery boot to micro sdcard

Note [MENTION=4821597]social-design-concepts[/MENTION] tool listed below, any question on his tool ask in below thread, I have no personal experience, but I know it has helped many windows users.

https://xdaforums.com/android/development/intel-android-devices-root-temp-cwm-t2975096

Download tethered recovery package

You need to extract to use, set permission on files if needed.

https://www.androidfilehost.com/?fid=457095661767147708

Now that the bootloader has been replaced flashing permanent recovery is possible, I already have permanent recovery on mine.

You all need a few more steps, the first is above backing your tablet up.

Next you need to get familiar with Carliv Image Kitchen for Android - unpack/repack boot-recovery

https://xdaforums.com/android/development/tool-cika-carliv-image-kitchen-android-t3013658

Those backed up boot.img need to be modified, we will get into that later.

credits

[MENTION=289644]greatbal[/MENTION]

5.1 rom backup

[MENTION=8114384]Conan1201[/MENTION]

Giving me this tablet

[MENTION=358983]cellneuron[/MENTION]

boot.img, build.prop

[MENTION=4821597]social-design-concepts[/MENTION]

recovery.launcher, recovery.trigger.new, recovery.trigger.original

[MENTION=7984333]teamwin[/MENTION]

recovery source
[MENTION=2472806]vampirefo[/MENTION]

putting this together