I have two issues with USB.
1. The two USB ports on the left of the P775DM3-G seem much less compliant than the two on the right. PEripherals are often not detected when connected on the left. For instance: Leap Motion, MIDI devices, Sensel Morph, iPad. At least there's an issue with the system detection because most of the time there's not the chilme sound which Windows 10 produces when a peripheral is connected (which happens normally on the right ports). The ports do not seem to have a hardware malfunction. For instance, USB flash drives can be used normally.
2. When the computer goes to sleep and wakes up, my soundcard (MOTU Ultralite3 Hybrid) cannot be found anymore (even if it's connected on the right side). Is there a way to at least reconnect it logically without having to unplug and replug it (it's bad for the loudspeakers) or restarting the computer (my live music setup takes time to be configured at each startup, so I prefer not to restart).