Guess whats the problem:
I just changed my monitor and my VGA Cable and then this happens randomly
same issue here on my intel integrated graphics laptop and nvidia proprietary driver desktop both of them solved by updating just do sudo dnf upgrade --refresh
don’t forget to wait up to 15 minutes after the update command finishes to give time to nivida kernel modules to build
that’s waiting up to 15 minutes after command completes
Ah, i didn’t wait, what to do now?
my bad you only need to wait if you have nvidia proprietary drivers installed, and if you reboot without waiting you will fallback to cpu rasterization(legacy cards) (that once happend to me on my get 970, i had one monitor plugged to the gpu and a dongle attached to the motherborad on one end and nothing on the other end gave my flickering issue the flickering went away as soon as i unplugged the dongle no need to restart or anything) or nouveau unlocked drivers(rtx 2000 and newer series cards) in that case do sudo dnf install akmod-nvidia but only run that command if you had nvidia proprietary drivers installed and updated either the kernel or the nvidia proprietary drivers if you updated anything else you don’t need to wait or if your using the nouveau unlocked drivers you don’t need to wait
my gpu is intel, not nvidia