Comment # 3 on bug 111789 from Vlado Plaga

Cool, thank you, "usual user"! Your "cma=256M@2G" works for me. No more
"command buffer outside valid memory window", and I could start Weston with
weston-launch! The terminal there had a nice shadow, and I could drag it around
smoothly.

(But Fedora 31 for arm apparently does not offer vlc, mplayer, or kodi... so
I'm gonna try Armbian again next, with the switch)