Sorry for the silence - my tablet finally arrived (I got the 3 GB/32 GB version). I let it update to Android 9 and flashed Ubuntu Touch successfully - works like a charm!

I had to fiddle around a bit to get it to work - nothing big, mostly mashing buttons to make it reboot properly. I did notice those things though:

• When installing, one fastboot command failed and the error message (reported as JSON) said a different command needed to be run to finish unlocking the bootloader. Running that command manually and retrying worked. I don't have the command as I'm currently not next to the computer I used to flash, but I noted the command somewhere and I'll post it here whenever I can.
• When shutting down my tablet while leaving it plugged in, it can't "boot" to the battery charging screen; it stays stuck to the "Lenovo - powered by android" screen forever, which means it stays on all of the time it's plugged in for charging.
• This might be a problem with Ubuntu Touch rather than this port, but when I go to the lock screen, I can hide the side panel, but when I try to type in my password, the keyboard has a slight offset to the right, large enough to contain the side bar, even though I hid it.

I also have the classic issues (can't use adb and so on) but for the rest, it works amazingly well!

If the devs are around, I remain available for testing, so if there's something useful I could do to help, please let me know.

I would like to buy an x605f that comes preinstalled with Android 8. Since the port uses Halium 9, I will have to install Android 9 on my tablet prior to installing Ubuntu Touch.

How easy is that process? Do I need to flash an image? Can I upgrade manually?

I returned to the website and tried a bunch of images again - I noticed that this time, SP Flash Tool didn't complain about the image-provided DAs, so I used those instead of the default one.

Although all are Android 10, I noticed slight differences between each version, such as whether the installer's "return" mechanism was done with an edge swipe or with an arrow at the bottom of the screen. I took care to check the build ID to make sure the image installed properly.

Here are my findings:

• TB-X606F_S300554_220303_BMP -> Android 10, arrow (default Lenovo rescue image)
• TB-X606F_USR_S100168_200828_BMP -> Won't even boot (used the image's DA, though I also tried using the default DA and it wouldn't boot either, though the SP Flash Tool could re-flash it in both cases)
• TB-X606F_S300007_200923_BMP -> Android 10, swiping
• TB-X606F_S300091_201215_BMP -> Android 10, arrow
• TB-X606F_S300130_210122_BMP -> Android 10, arrow
• TB-X606F_S300177_210304_BMP -> Android 10, arrow

At this point I assumed any S300XXX and subsequent numbers were not what I was looking for, so I tried the only two smaller versions:

• TB-X606F_S000009_210526_BMP -> Android 10, arrow (Some weird "Lovely B tv" boot logo, and some related apps on the home screen)
• TB-X606F_S100015_191127_BMP -> Won't even boot, part 2

At this point I abandoned; I used the Lenovo rescue and Smart Assistant tool to flash a working image and I'll try to bring my tablet to some repair shop to see if they can help.

I've bought myself a Lenovo M10, thinking it was an X605, but I realised it was an X606, which is not supported by the installer. Fortunately, I noticed there was already some work towards the X606 at https://gitlab.com/ubports/porting/community-ports/android9/lenovo-tab-m10-fhd-plus/lenovo-x606.

As the port uses Halium 9, one of the steps is to downgrade my tablet to Android 9 (Factory default is Android 9). The instructions point to https://mirrors.lolinet.com/firmware/lenovo/Tab_M10_FHD_Plus_2nd_Gen/, which I tried installing (X606F); but I tried installing 5-6 different ones and my tablet kept reporting to be "Updated to Android 10" in the settings.

I'm not sure if the images really all are Android 10 images, or if I'm doing something wrong.

• I'm using the SP Flash Tool (version 5.2208)
• I use, for example, the build TB-X606F_S100015_191127_BMP
• I load the scatter-loading file into the flash tool
• When I try to load the Download Agent from the image, the program reports the error "LIB DA not match, please re-select DA or ask for help", so I use the default DA provided with SP Flash Tool
• I uncheck the "preloader" option, as it seems to have bricked a few devices: https://forums.ubports.com/post/53158
• I leave "Authentication File" empty and I leave "Download Only"
• I hit "Download"
• I turn off my tablet and I plug it to my computer
• It runs, and finishes with the green checkmark
• I unplug my tablet and let it boot; I have to walk through the installation steps, but when that's done, I go in the settings and read "Android 10" (although the build ID, TB-X606F_S100015_191127_BMP, is present and valid)

Am I doing something wrong? Is there an error above that's not normal? If the images really are all Android 10 images, where can I find Android 9 images?