Hi Marek, Thanks for the patch. I *think* it worked. I fumbled my way through building mesa (git cloning and applying the patch was easy), then copying just the new mesa/lib/gallium/radeonsi_dri.so to /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so , leaving everything else (binaries, libraries) as it is with the Padoka PPA, and now fs-uae will run with fences enabled. I haven't done any other tests (games etc) for any regressions. Cheers