Question Monitor Flickering during boot with CSM off

[Henryy1]

After disabling csm, there were videomode switches when entering setup, showing the post splash and choosing a boot option.
This did not happen with CSM enabled, there was no videomode switch when entering setup or entering a boot option. My bios is a bit weird with monitors, should i enable csm again?

 

[Lutfij]

First and foremost, we'll need to know what you're working with. When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

Second, why did you need to disable CSM? Third, if you've installed your OS with CSM enabled, it's best if you reinstalled your OS with CSM disabled(UEFI enabled, without legacy mode disabled).