Hi Henning, Just a thought, could you try booting with IOMMU disabled?
Edit /etc/default/grub, and append "intel_iommu=off" to GRUB_CMDLINE_LINUX_DEFAULT. Then save, and run "sudo update-grub" and reboot. Between 21.10 and 22.04 we enabled CONFIG_INTEL_IOMMU_DEFAULT_ON=y, and it has caused all sorts of odd issues, including performance related ones, so its worth a shot. We will be reverting the change to CONFIG_INTEL_IOMMU_DEFAULT_ON, and turning it off again in a kernel update in the near future. If "intel_iommu=off" doesn't help, then a make oldconfig with the 22.04 config and 5.17.7 would be interesting to see. Thanks, Matthew -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1973434 Title: massive performance issues since 22.04 upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1973434/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
