Hi,I’m trying to run Blender 2.78c (latest from Fedora repository after a clean OS install) but the user interface fails to show up. I can see that Blender is actually running because its icon stays in the GNOME shell dock but there is just no visible window whatsoever. If I attempt to launch Blender from the command line, there is no error message outputted to the console (there used to be an error message about failing to open a dri2 connection but uninstalling the “beignet” OpenCL package solved that).My graphic card is a AMD RX480 and I use the mesa 17.0.2 open source drivers. A previous version of Blender (I fail to remember which one exactly but I think it may have been 2.78a) used to run correctly under the same setup.How can I diagnose this issue?Thanks,PM