MM 2.4.1 - if anyone is trying to look for it while searching for forums. Apologies if it has already been stated
So i’ve done it both ways:
dtoverlay=vc4-kms-v3d
I noticed that my CPU temp is well into the 60-70 degree Celsius with CPU loads mostly in the 1.x, 2.x, and sometimes 3.x ranges
When i try the other way :
dtoverlay=vc4-fkms-v3d
CPU is much lower in temp under 50 degrees Celsius and CPU load rarely goes above 1.x
and i am able to use the tvservice -o and tvservice -p to schedule my monitor to go on and off at certain times
Hopefully this helps anyone searching for this issue on new installs like myself