Okay... I'm trying the Halium path... I'm stuck... I'm at this instruction...
First, you’ll want to find the repositories for your device on LineageOS’s GitHub organization. You can do this by typing your device’s codename into the search box. You’ll want the device repository, android_device_[manufacturer]_[device]. Take down this name, as you’ll need it later.

I went to LineageOS GitHub and looked for my devices codename in the searchbox... figured it would be something like sero 7, sero7, e270bsa, but nooooooo... it just keeps telling me, no results found...

It might be a lost cause anyway... because, I can't figure out how to get this thing into bootloader mode... I've held down the pwr and vol up key at the same time... all it does is either turn on or turn off... no menu at all...
So, I'm thinking that kernel v 3.0.8+ might not have a bootloader menu??? I don't know???

@advocatux Learning... Thanks...

@alan_g Just learned something else about it...
Ubuntu Touch has not yet been ported to the Sero 7 Pro. I imagine it doesn't use the same trees as AOSP or CyanogenMod so it might be difficult.

EDIT: I'm downloading the Ubuntu Touch source code now. I'll see what I can do.
EDIT 2: So, it looks as if Ubuntu Touch might use CyanogenMod trees. If it truly does that makes life easier, much much easier.
EDIT 3: Looks like the Sero meets the minimum requirements for the high end Ubuntu Touch that can dock with a keyboard and mouse.

I found it on xda-developers (whom I do not trust at all, generally)... https://forum.xda-developers.com/showthread.php?t=2536116&p=53324923
I just need to figure out where more of this info is at???

Thanks...
Reading it now...
This Halium project could take a minute to read up on and get started. But, at least, it's not starting from scratch... lol...
Thanks again...

Hello,
I want to put ubports ub touch on my tablet, the HiSense Sero 7 E270BSA.
HiSense Sero 7 LT E270BSA
Android 4.1.1
Kernel Ver 3.0.8 +
QuadCore - Rockchip 1.3GHz
Insert 32GB SD
When I run the installer it doesn't detect my tablet.
I'm running
System: Host: ThinkCentre-M81 Kernel: 4.15.0-29-generic x86_64 bits: 64 gcc: 7.3.0
Desktop: Cinnamon 3.8.8 (Gtk 3.22.30-1ubuntu1) Distro: Linux Mint 19 Tara
Machine: Device: desktop System: LENOVO product: 0385A11 v: ThinkCentre M81 serial:
Mobo: LENOVO model: serial: BIOS: LENOVO v: 9HKT41UUS date: 07/04/2011
CPU: Quad core Intel Core i5-2400 (-MCP-) arch: Sandy Bridge rev.7 cache: 6144 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 24743
clock speeds: max: 3400 MHz 1: 1596 MHz 2: 1596 MHz 3: 1599 MHz 4: 1600 MHz
Graphics: Card: NVIDIA GF108GL [Quadro 600] bus-ID: 01:00.0
Display Server: x11 (X.Org 1.19.6 ) drivers: nvidia (unloaded: modesetting,fbdev,vesa,nouveau)
Resolution: 1920x1080@60.00hz, 1920x1080@60.00hz
OpenGL: renderer: Quadro 600/PCIe/SSE2 version: 4.6.0 NVIDIA 390.48 Direct Render: Yes
Audio: Card-1 NVIDIA GF108 High Definition Audio Controller driver: snd_hda_intel bus-ID: 01:00.1
Card-2 Intel 6 Series/C200 Series Family High Definition Audio Controller
driver: snd_hda_intel bus-ID: 00:1b.0
Card-3 Logitech HD Pro Webcam C920 driver: USB Audio usb-ID: 001-004
Sound: Advanced Linux Sound Architecture v: k4.15.0-29-generic
Network: Card-1: Intel 82579LM Gigabit Network Connection driver: e1000e v: 3.2.6-k port: f040 bus-ID: 00:19.0
IF: eno1 state: up speed: 1000 Mbps duplex: full mac: <filter>
Card-2: Linksys WUSB100 v2 RangePlus Wireless Network Adapter [Ralink RT3070] usb-ID: 001-059
Drives: HDD Total Size: 6420.6GB (22.3% used)
ID-1: /dev/sda model: WDC_WD10EZEX size: 1000.2GB
ID-2: /dev/sdb model: SanDisk_SD8SB8U5 size: 512.1GB
ID-3: USB /dev/sdh model: Cruzer size: 64.0GB
ID-4: USB /dev/sdi model: My_Passport_25E1 size: 2000.4GB
ID-5: USB /dev/sdm model: External_USB_3.0 size: 1500.3GB
ID-6: USB /dev/sdn model: My_Book_1110 size: 999.5GB
ID-7: USB /dev/sdj model: Ultra size: 248.4GB
ID-8: USB /dev/sdk model: Cruzer size: 64.0GB
ID-9: USB /dev/sdl model: Sandisk_Ultra size: 31.6GB
Partition: ID-1: / size: 460G used: 162G (38%) fs: ext4 dev: /dev/dm-1
ID-2: /boot size: 704M used: 284M (44%) fs: ext4 dev: /dev/sdb1
ID-3: swap-1 size: 8.54GB used: 0.00GB (0%) fs: swap dev: /dev/dm-3
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 38.0C mobo: N/A gpu: 0.0:48C
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 276 Uptime: 1 day Memory: 3969.6/7932.8MB Init: systemd runlevel: 5 Gcc sys: 7.3.0
Client: Shell (bash 4.4.191) inxi: 2.3.56

I think that I removed all the computer and network specific info... lol...
Anyway, I can't get it to recognize my tablet. Now, it gives me a list of possible solutions to use if I want to do it manually. However, I don't know if any of them will work for a 'Sero 7'.

So, my question is, does anyone have any ideas how I can get the installer to detect my tablet or which of the manual selections might be the least harmful...
Thanks in advance for any constructive help.