Example on this image:
Refresh rate range is at the maximum refresh rate 144hz but the problem when playing the game is the screen has brightness flickering and make the game unplayable even on freesync monitor certified compatible g sync.
but don't worry here's a fix.
Step 1 download CRU (Custom Resolution Utility): https://www.monitortests.com/forum/Thre ... tility-CRU
Step 2 download 7-zip or Winrar if you don't have installed on your computer
Step 3 after unzipping the file: open CRU and click on the range limit
Step 4 disable g sync before change the frequency of your computer
Step 5 Click on edit and the change 144hz to 143hz.
Step 6 create a custom resolution in the Nvidia or AMD control panel at 143 Hz
Step 7 Restart your computer and enjoy a flickering free monitor.
Note this problem happens more often on AMD freesync monitor than G sync monitor.
A lot of people included me says they can't use freesync because of this problem, I started to think it's was because of G sync but it's not the G sync cause.
It's will be more coherent because of ETS2 Show 143hz at the maximum refresh rate.
My results: for me, it's work very well the result that's could be different for some users.
FAQ
My AMD Freesync disables automatically.
Normally it shouldn't or maybe there's a problem somewhere?
I put 143 Hz but the screen continues to brightness flickering.
decrease the freesync max range. I put 60-23 Hz as range and brightness flickering stop happening.
Have nice trucking.
