I did some test, with kernel 5.2.21 everything works (linux-image-unsigned-5.2.21-050221-generic_5.2.21-050221.201910111731_amd64.deb).
I also tried kernel 5.3.6 and the screen is again black at boot (linux-headers-5.3.6-050306_5.3.6-050306.201910111731_all.deb)
I did some test, with kernel 5.2.21 everything works (linux- image-unsigned- 5.2.21- 050221- generic_ 5.2.21- 050221. 201910111731_ amd64.deb) .
I also tried kernel 5.3.6 and the screen is again black at boot (linux- headers- 5.3.6-050306_ 5.3.6-050306. 201910111731_ all.deb)