The computer stopped detecting the phone (android 5.1.1), how to fix it?

Question

Android

Good evening. Today I discovered that when the phone is connected to the computer, the phone just starts charging and does not even give out the connection mode in the status, as if connected to a charger. There was no such problem before.
The actual Huawei Mate7 device with Android 5.1.1
On one Debian 8 computer, which does not react at all and does not produce anything in lsusb.
On the second computer, Windows 7, which simply says that unknown equipment is connected, but cannot say anything else.
The cables are correct. The phone itself works great. What could be the problem and how to fix it?

Answer 1

then try everything