I'm also affected by this bug. I have a couple of USB expansion cards that were on its own IOMMU group and now they are in group 1 so it is impossible to pass them to a virtual machine.
On the older 6.8.0-124 kernel: IOMMU Group 14 03:08.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 600 Series Chipset PCIe Switch Downstream Port [1022:43f5] (rev 01) IOMMU Group 14 05:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM3242 USB 3.2 Host Controller [1b21:3242] IOMMU Group 15 03:09.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 600 Series Chipset PCIe Switch Downstream Port [1022:43f5] (rev 01) IOMMU Group 15 06:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM3242 USB 3.2 Host Controller [1b21:3242] and on the 6.8.0-134 kernel: IOMMU Group 1 05:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM3242 USB 3.2 Host Controller [1b21:3242] IOMMU Group 1 06:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM3242 USB 3.2 Host Controller [1b21:3242] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2158934 Title: Regression related to IOMMU grouping To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2158934/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
