I have a 3 monitors setup: 2 monitors at 60hz, the third one at 23.976hz.
With driver 387.34 and the attached xorg.conf, launching compiz with:
export __GL_SYNC_DISPLAY_DEVICE="DFP-2" compiz --replace ccp
allows all things to be perfectly smooth. All compiz animations are displayed at 60hz on 60hz monitors. Films displayed on the third monitor are perfectly synced. And no tearing on all three monitors. As expected replacing “DFP-2” with “DFP-1” (which correspond to the 23.976hz monitor) make all things synchronized to 23.976.
Replacing with driver 390.12 without touching anything else does not behave the same. All is synchronized to the 23.976hz monitor whatever I put in __GL_SYNC_DISPLAY_DEVICE.
xorg.conf.txt (2.11 KB)