Originally Posted by NFSP G35
It's unlockable, and I was able to splice together a TWRP image that would at least boot... which means getting a working TWRP is just a matter of time/effort.
I haven't had much time to work on it yet, but I was going to take another stab at it and see if I could correct the issues I was having with my Frankenstein TWRP while also trying to build one proper.
You should go ahead a pick one up. You might even try putting together a TWRP image yourself if you have some time, patience and are comfortable working in a Linux environment. Because it's definitely possible.
Maybe if I get another drive and setup a full Linux system. I have been running Linux Mint Mate for over 2 years from a High Speed, 16 gb USB thumb drive I created with a persistent, casper_rw partition. The problem I have in using it for dev, is I only have 2 gb of space left.
To download the git repo for TWRP requires a huge amount of space, from what I remember when investigating it for my Nextbook Ares 8A tablet in the past. Plus I couldn't temp root it to pull the kernel. Ended up paying someone for his, which I have a link in my Ares 8A root thread for.
I rarely ever boot with the internal HD into Windows, anymore, but I need to keep Windows 7 on it. Partitioning and duel booting is not really an option on that 500Gb drive without loosing alot of files on it.
Maybe I will buy one of the tablets anyway. One question,though, is this the exact command I need to enter to backup the boot.img and do I do that from a terminal emulator on the tablet, or do I do it from a terminal started from my Linux PC with mtk-su?
dd if=/dev/block/by-name/boot of=/sdcard/boot.img
The other thing I forgot to mention was that I have use AIK to modify boot.img's but my only attempt to try to do a modification of my working TWRP did not work, but that was only a brief attempt as the mod was not really that important at the time.
UPDATE: I unpacked TWRP v3.1.0-0 for my Nextbook Ares 8A in AIK, ui.xml has: resolution width="1080" height="1920", is this the same for the Onn tablet? If so, maybe if I provide you with that ui.xml file, it will work in your twrp. I could also provide any others such as portrait.xml and splash.xml. Done. My guess is that the proper permissions may also need to be set for the files. There are font, language files and images in that twres folder also that could be useful. I'm not sure what version of TWRP yours is so some of those could potentially have changed.
I don't think that other files will be useful in this recovery, since The Ares 8A's are Intel x86 devices. Please let me know if I can provide anything else. The twrp.zip contains the font, language and image files from the unpacked twres folder, also.
I just had a thought, you are on the 10" tablet, so this may be all in vain. I do know some 10" Ares 10A users were able to use my recovery, but not sure how it worked for them, apparently enough to be able to use it, though. I looked it up and the Onn 10" has a 800 x 1280 resolution. I see the resolution listed in both the ui.xml and splash.xml files. Maybe just changing those values to 800 x 1280 resolution will be enough. Let me know how it goes.