TL; DR: After a few weeks of deliberation, AMD solved the interrupted USB connection problem as reported by many users. An AGESA update containing the solution will be sent to the motherboard manufacturer next week, and it will depend on them. AMD estimates that the first beta BIOS with the solution will be available in early April.
Reports of sudden USB disconnections and poor signal quality on AMD X570 and B550 motherboards started coming to an end late last year. Three weeks ago, AMD finally acknowledged the problem and began gathering information from the victims. The severity of the problem has been shown to vary randomly, but the likelihood that it would occur was correlated with the load of hardware such as new GPUs and VR headsets.
AMD unfortunately did not explain what the problem was, but one Redditor suggests that the cause is a ‘timing issue trying to synchronize USB signal with the faster symbol speeds of PCIe 4.0’, while another thinks it may be caused by ‘a controller recovery enabled due to too many irreparable PCIe errors.
Since Redditors found a solution that was good enough to recommend AMD, their comments should not be dismissed quickly.
AGESA updated for intermittent USB connection from r / Amd
If you’ve experienced the problem, place a reminder in your calendar for next month to check for an updated BIOS from your motherboard manufacturer.