IOMMU GROUP mismatch BIOS V4.10
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=17081
Printed Date: 11 Nov 2025 at 11:26pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: IOMMU GROUP mismatch BIOS V4.10
Posted By: roobware
Subject: IOMMU GROUP mismatch BIOS V4.10
Date Posted: 27 Oct 2020 at 1:35am
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My system: Mainboard: Fatal1ty B450 Gaming-ITX/ac CPU: AMD Ryzen5 2400G Memory: 32GB NVMe: 480GB SATA: 2x4TB and 2x1TB Additional Intel IGB300 NIC Card with 2 Ports The IOMMU GROUP NUMBER are correct until to the BIOS Version 3.70.  After the update to V4.10 will this made a mismatch in the number order.  I have this tested on Debian and Archlinux, from Kernel 4.9 to 5.9, always the same. The option ARI in BIOS have no effect to this. The menu point "Advanced\AMD CBS\FCH Common Option" are completely missing in V4.10. On V3.70 I can see in this menu my additional NIC card and can change the availability of the ports. If this a bug or a incompatibility with the AMD Ryzen5 2400G CPU? |