Huawei ascend p7: no USB connection methods
I have managed to solve my problem. It seems that, due to some reason, my USB port's power limit was exceeded and it froze itself. I'm not fully sure what caused this to occur, but after disconnecting everything and resetting my USB ports it somehow worked again..

The following message occured after trying a few USB ports:


I disconnected my phone and pressed reset after clicking the popup and it seemed to do the trick. A more thorough explanation on what to do in case of this popup can be found here.