> In Raspbian Buster on my Pi 3B > es2gears [...] > 718 frames in 5.0 seconds = 143.600 FPS > root@upstairs:/usr# glxgears [...] > 838 frames in 5.0 seconds = 167.566 FPS [...] > Debian Stretch on my Pinebook Pro has the 60 hz limit in effect.
Not sure in which way these data points are relevant. A "60hz limit" is not a defect, AFAIK, and you're comparing Debian on a Pinebook to Raspbian on a rpi3, whereas AFAIK the message to which I was responding was arguing (IIUC) that Debian-on-rpi3 has a problem with the GPU because it doesn't include the mali driver. If you hit a 60hz limit on the Pinebook it shows that there *is* a driver for its GPU. Stefan