It's most likely a bug, remains to be seen on whose side though - it's a bit unlikely that it would be a driver issue as it's too universal for NV to not pick up on it during driver testing.
There's like LG OLEDs with HDMI 2.1 only anyway - what would you use to test your new GPU with an HDMI 2.1 output if not them?
Hopefully this will be patched by LG and/or NV.
So to be clear, this is only gsync. Free-sync\HDMI VRR is fine?
There are three hardware implementations of adaptive sync which NV supports presently:
1. Gsync native over DP <- this is what the old Gsync is, it works with displays which have Gsync h/w module (called Gsync / Gsync Ultimate these days, works via DP only)
2. VESA Adaptive Sync over DP <- this is what is known as Freesync on DP in AMD world (called Gsync Compatible these days, works via DP only)
3. HDMI VRR over HDMI <- this is the adpative sync tech which was added to HDMI 2.1 and can be used over HDMI 2.0 too (called Gsync Compatible too, works via HDMI only)
All of them are called "Gsync" in the s/w layer which NV is running on top of these h/w platforms.
There is no "Freesync" support on NV h/w, it's VESA Adaptive Sync with Gsync.
HDMI VRR is "Gsync" on NV h/w, via HDMI VRR with Gsync.
Basically, there is only HDMI VRR support if you're looking at HDMI connection on NV h/w.
On DP there can be either native Gsync through Gsync h/w or Gsync via VESA Adaptive Sync spec.
Does it still work with the RTX 2080 ?
Sure, at up to 4K/60 or 1440p/120.
2080 doesn't have HDMI 2.1 output.
