No Surprise But Intel Linux Developers Are Working Towards Adaptive-Sync Support
Intel's Linux open-source graphics driver stack is nearly at parity to their Windows graphics driver, sans pieces like lacking a nice GUI control panel for Linux and other mostly small bits. So moving forward, especially with how much time already the Intel open-source developers have been working on the Icelake support, it shouldn't be a surprise that they intend to work out Adaptive-Sync support. But it's refreshing to hear that it is happening.
The latest indication of that was a mailing list post by an Intel developer commenting on one of the AMD Linux patches, "Yeah I expect we'll need to do something similar for intel vrr. That's why I'm in this discussion." VRR, of course, being Variable Rate Refresh -- HDMI VRR / DisplayPort Adaptive-Sync.
Part of why it took AMD so long to mainline their FreeSync/VRR open-source Direct Rendering Manager support until now with the Linux 5.0 kernel cycle was for seeing that the core DRM/RandR properties they were adding would be suitable for other upstream drivers to support, Intel included.
While there has been a lot of Intel Icelake Linux driver code published already, as of yet we haven't seen any actual Intel Linux patches providing support for this feature to reduce/eliminate stuttering and tearing. Hopefully we'll see that in the months ahead with Icelake processors not expected until later in the year.