CJCJ

Well, despite the lack of assistance from the forums, I found that monitoring the threads while plugging and unplugging a USB mouse and keyboard did the trick. The threads have returned to normal levels.

Did you ever find a permanent solution to this problem? I'm experiencing the same issue, and made a new post about it:

Good evening, Diagnostics attached. I've read quite a few posts on the UnRaid forums on this topic, most notably: I also have two CPU cores stuck at 100%. Caused by the following two USB-related processes: Things I've done so far: Updated BIOS firmware (Gigabyte X570 Gaming X) Turned off IOMMU, XHCI, AMD-V (I'm running a Windows VM) and USB legacy in BIOS Turned off Docker & VM services, turned off array in UnRaid Tips and Tweaks - CPU scaling governor: On Demand 0 ACPI interruptions running..... grep EN -r /sys/firmware/acpi/interrupts/ /sys/firmware/acpi/interrupts/ff_pwr_btn: 0 EN enabled unmasked /sys/firmware/acpi/interrupts/ff_gbl_lock: 0 EN enabled unmasked In each scenario, both cores remained stuck at 100%. The only USB device connected is the UnRaid flash boot drive to a USB 1.0 port. I'm at a loss here. Thankfully there's no noticeable performance issues, but I'd like to keep this CPU/mobo setup for the long-term. unraid-diagnostics-20211129-1834.zip