ffmpeg and qsv

Hi, Does anyone use ffmpeg with qsv (Intel Quick Sync) on F30? I have a supported platform with a Coffee Lake CPU, but I can't get it to work. A simple h.264 video to null output results in this output: [AVHWDeviceContext @ 0x55ce220a3e00] Error initializing an MFX session: -3. Error creating a QSV device qsv hwaccel requested for input stream #0:0, but cannot be initialized. Error while decoding stream #0:0: Operation not permitted VAAPI encoding/decoding works fine. QSV does not. I have tried all sorts of command options. I have 'intel-media-driver' installed. The 'vainfo' output shows the iGPU is recognized. I even tried reloading the i915 module with enable_guc=-1, which successfully loads the GuC and HuC firmware. Nothing works. Thanks, Michael