Posted on Friday, Mar 12 2021 @ 09:27 CET by Thomas De Maesschalck
AMD engineers have found a solution for the USB issues that are annoying a lot of 500-series chipset owners. A lot of reports are circulating around the web about users who experience connectivity issues with USB devices
or audio issues with DAC/AMP combos. Up until now, the only solution was to disable PCI Express 4.0 and/or experiment with turning off global C-States. This is not ideal of course, as this is a temporary workaround at best.
AMD AGESA 18.104.22.168 is coming later this month
A more permanent solution is on the way as AMD is addressing the intermittent USB connectivity issues with the AMD AGESA 22.214.171.124 microcode update. The firm isn't revealing what caused the problem but the root cause has been identified and can apparently be fixed via a firmware update. AMD says AGESA 126.96.36.199 will be distributed to motherboard makers next week, so hopefully, new motherboard BIOS versions with this fix will hit the web later this month.
We would like to thank the community here on r/AMD for its assistance with logs and reports as we investigated the intermittent USB connectivity you highlighted. With your help, we believe we have isolated the root cause and developed a solution that addresses a range of reported symptoms, including (but not limited to): USB port dropout, USB 2.0 audio crackling (e.g. DAC/AMP combos), and USB/PCIe Gen 4 exclusion.
AMD has prepared AGESA 188.8.131.52 to deploy this update, and we plan to distribute 184.108.40.206 to our motherboard partners for integration in about a week. Customers can expect downloadable BIOSes containing AGESA 220.127.116.11 to begin with beta updates in early April. The exact update schedule for your system will depend on the test and implementation schedule for your vendor and specific motherboard model. If you continue to experience intermittent USB connectivity issues after updating your system to AGESA 18.104.22.168, we encourage you to download the standalone AMD Bug Report Tool and open a ticket with AMD Customer Support. -- AMD on Reddit