In comment #9 you said "with vanilla kernel" - can you please list the exact kernel versions you've tried (and which qemu versions you tried with them, including whether they were hand-built from git or packages from Ubuntu)
In comment #9 you said "with vanilla kernel" - can you please list the exact kernel versions you've tried (and which qemu versions you tried with them, including whether they were hand-built from git or packages from Ubuntu)