Comment 32 for bug 1848703

OK, with your new "roll up" things are looking quite good, however your config.txt contains
    dtoverlay=vc4-fkms-v3d
I can also see the matching device tree binary object
    vc4-fkms-v3d.dtbo
In
    /boot/firmware/overlays

I can see
    /lib/modules/5.3.0-1008-raspi2/kernel/drivers/gpu/drm/vc4/vc4.ko
But I cannot see
    /lib/modules/5.3.0-1008-raspi2/kernel/drivers/gpu/drm/v3d/v3d.ko

This is crucial for graphical applications (such as ubuntu-desktop :) as it removes the graphical overhead from the cpu to the gpu, making the applications work much faster.

Have I failed to load your linux-modules properly or is it missing?

I think the
    .../linux/arch/arm64/boot/dts/overlays/vc4-fkms-v3d-overlay.dts
is worth checking.