No it’s not the Windows drivers! The BIOS (UEFI) configuration utility on these things is not built to match the hardware at all. In fact it is wide-open with all the options that the original BIOS-software-supplier has available – most options that are not valid choices for the actual machine at all. A hackers dream perhaps, but a nightmare on this occasion.
Whatever you do, do not do a ‘load defaults’, because you’ll lose the LCD display as well!
If you do lose the LCD display, you’ll need to buy a micro-HDMI to HDMI adapter cable, so that you can plug a big HDMI screen or TV into the tablet, and get back into the BIOS setup, from where you can set the LCD-out to EDP, instead of MIPI or whatever it’s been accidentally set to.
Now, forgetting the above, and even knowing that the problem with the cameras is actually down to the configuration options in the BIOS setup utility, I still could not get the cameras going! There are too many options. It’s not just the list of cameras (front: 6 different camera types, rear: 8 different camera types, or vice-versa), there is more to it than that. I suspect some kind of multiplexer or GPIO module which allows the switching between front/rear camera.. yet more options to which we don’t know the correct setup.
As luck would have it, somebody from LINX / Exertis responded to my email request for help – which was a surprise because their auto-responder said that they would only help with in-warranty requests for hardware support. I had given up hope, but a week or so after my initial email, I received a helpful response from Mr Moores at Exertis, with links to an updated BIOS for the machine, and the promise that loading this would apply all the correct settings for the machine, for camera, and other things that probably weren’t working correctly but had yet to come to light. It also purportedly improves WiFi with Windows 10.
I tried it, and it worked!
You can find the file here.