AMD Identifies and Fixes Cross-Platform USB Connectivity Issue With AGESA Update
TL; DR: After a few weeks of deliberation, AMD fixed the intermittent USB connectivity issue reported by many users. An AGESA update containing the fix will be sent to motherboard makers next week, and it will be up to them to decide from there. AMD estimates that the first beta BIOS with the patch will be available in early April.
Reports of sudden USB disconnections and poor signal quality on AMD X570 and B550 motherboards started to become commonplace on Reddit late last year. Three weeks ago, AMD finally recognized the problem and started collecting information from those affected. The severity of the problem has been shown to fluctuate randomly, but the likelihood of its occurrence correlated with the taxation of hardware like new GPUs and VR headsets.
AMD unfortunately did not indicate what the problem was, but one Redditor suggests the cause could be a “timing issue trying to sync USB signaling with the faster symbol rates of PCIe 4.0”, while another thinks that this could be caused by “a controller reset triggered due to too many uncorrectable PCIe errors.”
Since Redditors found a workaround that was good enough for AMD to recommend it, their comments shouldn’t be quickly dismissed.
AGESA update coming soon for intermittent USB connectivity from r / Amd
If you’ve encountered the problem, put a reminder in your calendar for the next month to check for an updated BIOS from your motherboard manufacturer.