Cursor laggy and top of the screen shows a line when its moved

Well. I tried the part that advises me to add the kernel parameters by running sudo nano /etc/dracut.conf.d/cmdline.conf (it seems this file did not exist before) and adding and saving:

# etc/dracut.conf.d/cmdline.conf
kernel_cmdline+=" amdgpu.dcdebugmask=0x200 "

I also ran sudo dracut-rebuild But it seems to have been of on use. No difference at all that I see

Also, I tried what the Reddit Post said, about editing /etc/default/grub But the file didnt exists before

I still created the file and added amdgpu.dcdebugmask=0x200 and Still didnt resolve the issue