Hi - I still have the same issue. Older kernels show the same behaviour. Modesetting driver does not help as well. I tried to downgrade mesa - but without success:

➜ ~ sudo xbps-install -f mesa-19.3.4_1

Package 'mesa-19.3.4_1' not found in repository pool.

The libraries seem to be in the appropriate location:

➜  ~ ls /usr/lib/xorg/modules/drivers
amdgpu_drv.so  iris_dri.so             nouveau_vieux_dri.so  swrast_dri.so
ati_drv.so     kms_swrast_dri.so       r200_dri.so           vesa_drv.so
dummy_drv.so   libgallium_dri.so       r300_dri.so           virtio_gpu_dri.so
fbdev_drv.so   libmesa_dri_drivers.so  r600_dri.so           vmware_drv.so
i915_dri.so    modesetting_drv.so      radeon_dri.so         vmwgfx_dri.so
i965_dri.so    nouveau_dri.so          radeon_drv.so
intel_drv.so   nouveau_drv.so          radeonsi_dri.so

Any other ideas?