Why does my touchscreen only work when touching the case?
I recently picked up a Surface Pro 4, and I love almost everything about it. There is one behavior, however, that puzzles me. It seems that, when I am holding the device with my hands, the touchscreen is perfectly responsive. When I touch something, even lightly, it recognizes my finger... no issues here.
The issue arises when I am not touching the back of the tablet. Let's say I have it propped up on its kickstand, or resting on a table. If I don't touch it for 30 or so seconds, then try to use the touchscreen, it can become very unresponsive. Basically, if I have no point of contact with the device other than with the finger I am using to touch it, it have to firmly press, or hold, to get the screen to see my finger.
This behavior can be demonstrated in OneNote with the finger-writing enabled. I put one finger on the side of the surface, or the back, or anywhere that is magnesium, and I can draw hundreds of lines and it will pick up all of them, with their correct lengths. If I don't touch the side, about 50% of the lines will show up (doesn't recognize the other 50%?) and the will often begin a few cm away from where I started, but end in the right place. It's almost as if once it recognizes my finger, I can keep a continuous line going, but it has trouble recognizing it.
The digitizer works flawlessly at all times.
Anyways, just wondering if anyone has experienced anything similar with maybe a surface, or just a tablet in general. It's such a new device that not many issues have come up when I try to look into it elsewhere. I have worked on so many iPads, and I've never seen anything similar to this.
Thanks
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I have the same problem, on SAMSUNG GALAXY S10+ !!! with glass screen protector applied.
It seems to be, that the too thick glass screen protector causing the problem.
How do I know it?
The screen protector has a small circle cutout, for ultrasonic fingerprint sensor to work.
So, if the phone lays on bed, or anything else than me (not in contact with my human body), after a few seconds it stops to work. But on the cutout, where is no glass, or near top or bottom edges of screen (with glass protector) it can sense my finger.
Jozsef STROBL さんによる