In the nvidia-settings app, there is a toggle called
[X] Enable Graphics API Visual Indicator
In the hover-help it states: “it shows whether the application is blitting or flipping.”
I enabled this indicator, and indeed see printed in my window the FPS, and BLIT - VSYNC ON.
Now, no matter what I set “Allow Flipping” to, all my apps always show BLIT, and never FLIP.
I am pretty sure the Indicator is broken, and not the actual FLIP setting.
Because my app does behave differently with Enable Flipping set to ON or OFF. If it is disabled, I see my app stutter at times. If I enable it, the stutter is gone.
Hence: the BLIT/FLIP toggle works. But the BLIT/FLIP indicator is broken.
OS: Linux x86 64 bit (Ubuntu 18.04.2 LTS)
GPU: GeForce GTX 1650
NV-CONTROL Version: 1.29