USB-C Plugable dock with Dell laptop, two external displays (one HDMI one DVI), Ethernet, mouse, keyboard, USB drive, USB printer attached. Mostly this works but occasionally the display and responsiveness on mouse/keyboard becomes sluggish. At this point Windows Interrupts start occupying usually about 20% CPU (four core i7), and the external displays start to exhibit a lot of tearing and refresh problems.
Unplug the USB-C, let the laptop retake control, and the CPU usage disappears. Plug the USB-C back in and it’s all OK for a while.
I’m on the M3 DisplayLink Manager, latest Windows updates and latest drivers for my laptop, including the graphics driver (or so the Dell update tells me). Also, I have resolved other issues about the Windows tearing effect with non-Aero themes so normally this really does work very well.
I haven’t quite nailed down what causes this new problem with the high CPU on Interrupts but it has come up a couple of times now - whether it is just work for a period of time or if it happens after something specific. Wondered if anyone had seen this as well?