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6

This is indicative of poorly designed/ defective piece and best replaced ASAP. From bwDraco's answer on Why do some AC adapters and power supplies generate a whining noise, and what can I do about it? (emphasis added; missing text denoted by "....") Most modern AC adapters are switched-mode power supplies. The internal switching frequency of an SMPS is ...


2

First of all, I would like to thank everyone who helped me understanding what can be the problem exactly; I am posting it as an answer because this is what solved my issue. The problem was neither with the charger nor with the USB cable. The real culprit was an extension cord which was offering very high resistance probably. Since my socket is at a ...


2

There are a couple of options out there, here is a good article detailing them - Everything You Need to Know About Printing From your Android Phone or Tablet Personally, I've had some luck with my old printer using an OTG cable and the PrintShare app. It seems to have a good library of drivers. PrintShare - Google Play:


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I've done a little research on this (well I read the Wikipedia article on USB) and it seems that for fast charging there are two standards: the Apple one, and the non-Apple one. So yes, the two ports on your portable battery are different. The real question is - does it matter? My experience is that some devices don't care which socket they are plugged ...


1

Late answer, but the sure way to disable everything is to run this command at startup or set this in your build.prop: setprop persist.sys.usb.config none which is equivalent to charge-only. That also disables ADB. If you need adb regularly, then: setprop persist.sys.usb.config adb will allow adb when developer options are checked. I would not ...


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It is possible in a sense, however. Given the limitations mentioned in @t0mm13b 's answer, it makes sense that the mentioned boot loader (lk) is incapable of doing this. So, we boot a custom kernel from fastboot (for testing), which boots, enables OTG functionality and once a valid kernel is found on the OTG device which is connected, chainloads that into ...



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