[Miscellaneous Android Development] martyfender:
Just out of curiosity, does bluetooth sound work? This is the first I have heard of the V1.0.7 tablet. It must be one of the very first versions released so I don't know where to get that rom version unless another user has one. The oldest version I own is V1.1.1. I have had the V1.2.0 rom on it and wifi, sound and bluetooth audio all work on it. Last week I put the V2.1.5 rom on it and wifi and bluetooth audio worked on it. only the external speaker and headphones did not have sound.

Last night I put V3.0.4 on it and only wifi and bluetooth sound worked on it, but not the external speaker or the headphone jack.

Flashing the V1.0.8 boot.img on a V1.0.7 rom would explain your issue initially, but not what you did after that.

Maybe you could go back in the thread and PM one of the 1.0.8 and ask them to upload the V1.0.8 rom and that may work, I'm not sure, though.

Under: about tablet, what is your IFWI version?

From what I have learned, to date is that any version of the rom in the same version series works. I have a V1.1.1 and a V 1.2.0 series and the V1 series works on that tablet fully, but V2 and 3 series roms do not fully fuction, as far as sound goes.

Unfortunately, I am out of any other ideas.

I have a similar, but different issue on my V1.1.1 tablet where the external SD card will not always mount with all versions of the rom I have.

It will usually always mount after I wake it from a doze of quite a few hours.

once it goes back to sleep, it will loose the mount and may, or may not remount on wake unless i goes into doze again, and a long time has passed, which is strange.

I don't think this will make a difference, but have you tried going into twrp and choosing advanced wipe and check the boxes dalvik cache and cache,

do not make the mistake I have made when in a hurry and check the system, by mistake

swipe to confirm and then reboot.

I don't know why the twrp author made this change, but in previous version of it that I used on my ares 8 5.1.1, the system was not stupidly between dalvik and cache, as it is now. It is easy to check system by mistake if you are in a hurry. Again why he did this is beyond me?

Which version of supersu did you use? the system mode version in the V1.2.0 in my backup rom, or did you flash the systemless version: SR5-SuperSU-v2.82-SR5-20171001224502.zip that I am currently recommending? Try this, get Osmosis's UPDATE-unSU-signed.zip, flash it in twrp to remove the in built system mode supersu, immediately flash the Ares8A_120_boot.img, then the SR5-SuperSU-v2.82-SR5-20171001224502.zip and Busybox-1.27.2-YDS-X86.zip, reboot.

I don't think the above steps will help in your case but it is worth a try at this point.

This is rather drastic, but for me it has helped me in the recent past for unexplained reasons:

First of all have the twrp backups on the internal SD card. In twrp choose wipe, advanced wipe, check: dalvik cache, system, cache, data only.

Do not choose: Internal storage

swipe to delete every thing except internal. Now go back and flash the V1.20 twrp backup, the UPDATE-unSU-signed.zip, the SR5-SuperSU-v2.82-SR5-20171001224502.zip and the Busybox-1.27.2-YDS-X86.zip. Reboot and pray.

Why I got better results the one or two times I tried this method is a complete mystery to me betcause in the process of restoring a twrp backup, twrp erases these partitions.

"Dirty Flash = Flashing over current ROM

Clean Flash = Wiping EVERYTHING to make way for a new ROM."

Some of the info in this link may be relevant:

https://www.reddit.com/r/Android/comments/sthr8/dirty_flashing_what_it_is_and_is_not_lets_set_the/

Download links:

UnSU:

https://xdaforums.com/attachment.php?attachmentid=4311142&d=1508717474

SuperSU:

https://download.chainfire.eu/1220/SuperSU/SR5-SuperSU-v2.82-SR5-20171001224502.zip

YDS BusyBox:

https://xdaforums.com/android/software-hacking/tool-busybox-flashable-archs-t3348543

My V1.1.1 and V1.2.0 boot.imgs:

https://www.androidfilehost.com/?w=files&flid=202048

V1.2.0 TWRP pre-rooted backup rom Supersu in system mode, userdata deleted:

https://www.androidfilehost.com/?w=files&flid=197764