The iommu=soft workaround works for me. Without it my T495 was pretty much useless with Ubuntu.
Here are some detailed instructions for mere mortals: https://www.reddit.com/r/thinkpad/comments/eb08hk/t495_unplugged_battery_broken_boot_with_linux/ Does anybody know by chance when and how one can install a somewhat supported Kernel package that has the fix? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872452 Title: [amdgpu] Boot into black screen without power supply (Kubuntu on AMD) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kwin/+bug/1872452/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
