The behavior on:Linux chinchilla 5.7.0-3-amd64 #1 SMP Debian 5.7.17-1 (2020-08-23) x86_64 GNU/Linux is still the same: for the first suspend you need to enable the graphics card manually. On any subsequent suspend the mechanic works.
Could someone please look into this bug? It lies around since nearly a month now with no reaction at all.
-- Kind regards, Felix Dörre