I noticed the same problems and a few more. For example closing the lid hangs the system. Disconnecting the power supply hangs the system. All clearly kernel related.
I tried the iommu=soft solution which didn't work for me. Also adding amd_iommu=pt didn't help.
I noticed the same problems and a few more. For example closing the lid hangs the system. Disconnecting the power supply hangs the system. All clearly kernel related.
I tried the iommu=soft solution which didn't work for me. Also adding amd_iommu=pt didn't help.
The best fix I found so far was upgrading to a more recent kernel. i.e. Get this script: https:/ /github. com/pimlie/ ubuntu- mainline- kernel. sh
And install the latest kernel.