This probably isn’t even opensuse related but as it happened a few days after the installation maybe it’s the key here.
A few days ago I installed opensuse and had it dual boot with windows. Now it was working fine this morning but then it suddenly stopped displaying anything from the boot screen/windows. It just detects nothing until opensuse loads and even then it’s at the wrong resolution. When opensuse loads i can see something saying that the hdmi detects the monitor but not something else (I do not understand any of the messages you get before opensuse properly boots up). I tried changing my hdmi cable but the same problems still arise. I can’t really say much more as it’s pretty hard to see what’s going on until opensuse loads (And annoyingly enough i don’t know the exact model of the TV), but my Wii U goes on at perfect resolution but lacks sound. Why does Boot screen/Windows, opensuse and my wii u all have different problems all relating to hdmi and why did the issue come straight out of the blue?