[Device Reviews and Information] bitbang3r:
I'm having problems with the touchscreen on my Hi12.

About 2 years ago, Windows got stuck while attempting to install the Windows 10 Anniversary Update... every time I'd shut down Windows, it would launch into installing the update (no option to skip), crap out after a half hour due to running out of space, spend another half hour undoing the update, then finally shut down. My non-solution was to quit using Windows on it, and stick with Android... but a couple of days ago, I decided to try doing a clean install of Windows 10 to see whether I could sidestep the problem of running out of space by wiping Windows and reinstalling from USB (using media created with Microsoft's Windows 10 installation media creation tool).

The installation itself went along fairly uneventfully, but the touchscreen driver is now completely psychotic, to the point where I can't even use a USB mouse (I get control of the mouse pointer for about a second via the USB mouse, then it gets whisked away to some seemingly-random location on the screen). Interestingly (and perhaps significantly), the dysfunction doesn't begin until ~3 seconds after I log in. Moreover, if I press the power button, the screen shuts off for about a second, turns back on at the screen-saver screen, and the USB mouse controls the pointer perfectly... until I press a key or swipe with the mouse, at which point the dysfunctional touchscreen driver kicks in again and renders the mouse uncontrollable like before.

My guess is that the touchscreen device isn't getting powered up until a second after logging into Windows, and it's getting powered down while I'm on the "screen saver" screen, so at those moments it's not interfering with the mouse.

Does anybody have any ideas about how to fix this? I already tried copying "TouchSetting.gt" (downloaded from one of the few non-broken links at Chuwi's support forum) to c:\Windows\inf & rebooting... it seemingly did nothing... but I later read there are two versions (one for dualboot, one for non-dualboot), and I have no idea which variant the one I tried was (I still have it, so I can look at its contents if that'll help provide insight).

I managed to get into Device Manager using the keyboard alone & tried updating the Touchscreen HID driver by having it search for a newer driver, but it reported that I was already using the best-available driver (not really surprising... I don't think I've EVER had Windows automatically search online for a better driver and actually find one. I halfway think it's just a stub someone from Microsoft put in that just busy-waits for a few minutes, then reports that nothing was found).

This was actually my SECOND attempt to reinstall Windows on it. The first time around, the touchscreen ended up not working properly (it registered touches, but seemed to think they were all along the lower-right edge), but at least it wasn't generating phantom touches that interfere with the mouse.

Any ideas what to try next? I'm not averse to reinstalling Windows yet again, but I'd like to have some concrete idea of what to do differently the next time around instead of just blindly reinstalling Windows the same way again & hoping for a different outcome...