We recently upgraded our external monitor to a 15'' IPS Touchscreen. (we have space constraints, ...)
After trying different model, with various problems I thought we found an affordable offbrand one that seemed to work, and it kind of does, ...
One of the main problems with the other screens was that they lost touch sporadically and even calibration wasn't helping. Or they would rotate trough different resolutions at the bootup, ... (even if set to a fixed resolution)
The new screen works reliably, no flickering, the bootscreen is shown instantly and touch works, even if power is cut to the console and the screen for a couple of minutes. Everything comes back up as before.
The Problem is if there is a longer powercut, e.g. over night. On the next boot touch is simply not working. A quick calibration fixes the issue as if the calibration data is lost, ...
Is there a ways to keep the calibration or is there a magic setting I haven't seen?
Or is there a debug option that logs the boot process?
(As this might be asked, ... we already upgraded to zerOS 7.13)