I cannot connect my one plus two to my computer or laptop. debugging option is saying "Device is in charging mode, USB Debugging is disabled"
I had the same issue, and, after the following steps, it seems to have worked itself out.


Disconnect the device from my PC
Go to Settings > More > Tethering &amp; Portable Hotspot
Enable USB tethering
Disable USB tethering and Wait several minutes
Reconnect the device to my PC


After that, the USB Debugging option under Developer Settings was no longer greyed out.