LE (or me) has never created an image using vendor GPU drivers for Radxa Zero. We switched to mesa/panfrost before support for the Zero was added upstream.
frakkin64 I'm not sure that bug would be found in LE images since we aren't using EFI boot code paths in u-boot? - I can see how it would show up with dekstop distros though.
Too bad. Meanwhile, vpeter mentioned CoreELEC with vendor graphic acceleration on Amlogic SOCs ; perfect H264 rendering experience. I just happen to have this focus on the video details for a current project involving video live projection ; for anything else I'd try LibreELEC with the panfrost driver first, I promise