Comment # 1 on bug 1218780 from Ivan Ivanov

Hm, raspberrypi-firmware package have these lines[1]. 

Could you check which raspberrypi-firmware version is inside this image?

---
[pi4]

armstub=armstub8-rpi4.bin
# Note that the 7" DSI panel isn't supported at the moment through VC4, users
# can still use it through efifb by adding 'dtoverlay=disable-vc4' in
# 'extraconfig.txt'.
dtoverlay=vc4-kms-v3d-pi4,cma-default
dtoverlay=disable-v3d