I have this Ubunton tablet - Chinese lot selling to ebay suppliers, I gather.

There are only 2 mechanical buttons apart from power (Volume up & down). Holding Volume up while powering up gets me this (Pic attached). I feel sure I am into some other mode, but what, & how do I use it?

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it's some kind of system menu, normaly you want to wipe your data or flash your tablet if you go there..

Yeah, but I don't see how. . .

I had an old HTC dream - it had nandroid, & flashboot. I was looking for one or the other.

This thing has a whole pile of developer options you don't normally see. Not on my Samsung Note. It even has a /system/xbin/su command, but a luser is not allowed to su:-/.

For all you guys with cheap Chinese Rockchip SoC tablets: Sorted this.

I got into a boot loader. The way in is volume_up & power on together. Hold volume up. It shows this "no command" thing. Tap the robot 7 times on some, or start tweaking the volume down & volume up keys (up, down, up down, up, down) and you get this thing a bit like nandroid backup. For some internal hardware reason flashing from the SDcard is not an option.

You can flash from adb (it wants a file rkimage.img or suchlike, or take a few other setup & install type steps - navigate down with the volume down key. I could not navigate up with by volume up key, so beware of that. The last option is erase the cache, and that proved pretty harmless.

It is possible to root these devices. You can install one click root and apparently it does the job, trading on known Android vulnerabilities. Flashing them with Cyanogenmod is not an option, largely because there are so many different tablets, and there is proprietary software in there for all of them.

My tablet, for instance, has a 2048x1536 retina screen, external hdmi port, sdcard, RTL8188 wifi, no gsm radio, no bluetooth, & 7.7V 8800mAh battery. It has the rk3188 chip (4 arm cores @ 1.6Ghz) and mali gpu. I haven't seen that exact combination anywhere. The question to ask your seller on ebay/amazon is: "Where do I download firmware updates?" If they can't point you to a site, and you can't see the firmware, expect no updates. People who flash these things lose function - usually wifi sensitivity or bluetooth. One guy got going by copying the proprietary kernel modules in and altering their version magic - not for the faint hearted.

I have this sorted out not, but I'm doing nothing with it.
My device is a Broadwell Technology co tablet model BW-MC1027 with a rockchip rk3188 based rk30board from www.rock-chips.com. No support from either company. I don't even think I can get a spare battery.