A couple of weeks ago I started noticing some ghost touch on my android device. Initially was not very often and it didn't cause a big problem, but recently started to be really annoying.
Doing some research I found out that it happens only when connected to a cable (I tried more cables with the same results) and specifically when connected to a laptop.
I then tried an ipad and another android on the same laptop (a macbook), and it seems that only the ipad have the same bad behaviour. Then I tried to switch laptop (to a windows one) with my android and it seems to work perfectly.
The only common thing that I notice in all of this is that the problem seems to be present only on the macbook. Another thing that could matter is that I am a mobile developer and I use both my android and the ipad to test app, while the other android I tried was never used for this purpose.
Any suggestion?
31 Answer
Dropping to answer space just for sake of completeness...
I had similar happen when I was plugged into a half-rectified power supply. In my case that was a combination of an in-car 12v inverter to 240v, then the regular 240-5v mains charger. The only 'fix' was to just not do that. [I could have maybe found a fully-rectified inverter, but it wasn't worth the effort for the use-case.]
idk exactly what causes it, but I could always repro it reliably, any time a capacitive-touch device was plugged into that inverter.
The only thing further I could suggest to test would be the earthing/grounding on your mains supply & laptop PSU.
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