Custom Resolution Utility (CRU)

[solewalker]

(03-06-2019 08:14 PM)Deusesque Wrote:  

(03-06-2019 04:49 PM)ToastyX Wrote:  The output is a stream of pixels sent at a fixed rate. The pixel clock is the number of pixels sent per second including blanking. FreeSync is like increasing the vertical blanking in CRU without changing the pixel clock. It always sends at the same rate as 75 Hz and varies the blanking to delay the next refresh. The monitor probably has a limit for how long the blanking period can be. Static 37 Hz doesn't have a delay beyond normal blanking. It just sends at a slower rate.

Appreciate the very clear explanation.
Your explanation made me thinking: what if i minimize the standard blanking so that the freesync induced extra blanking JUST falls into the range of my monitor.

And it worked! It took a lot of tweaking with basically all settings (back/front porch and sync both horizontally and vertically) and now my monitor displays 37-75hz perfectly and i have full LFC now! I only have very rare tearing if the FPS is between 37-38 (i suspect actually it's limited to a decimal range) but that is hardly noticably in practice.

So thanks a lot for your help Toasty!

For others having my monitor (LG 29UM59-P), please find below the settings that worked for me.

Man, I have been having a similar problem for so long, finally your settings worked on my monitor too. I have LG 22MP68VQ, with your settings I am using 37-76Hz, but I gotta ask which radeon driver version are you using?
Because previously I was using my own CRU settings of 37-74Hz with 74Hz being "LCD Reduced" but for some reason I got sever stuttering whenever my FPS drops to 32-37 range with any driver released after 18.6.1, so I am still using 18.6.1 driver to this day. If your settings worked even for newer driver then finally I would upgrade my driver. Cheers!

Edit: I updated to 19.3.3 to give it a shot and to my surprise it works even better than 18.6.1 with your settings, running 37-75Hz, with no issues so far.