Synergy 1 and Synergy 3 now have experimental support for Wayland on Linux. Wayland is a display server protocol. It is aimed to become the successor of the X Window System.
The Synergy team would like to thank Peter Hutterer (aka whot) and Olivier Fourdan from Red Hat for their work on Wayland support. Peter's work on the libei and libportal libraries were essential to allow Synergy to work with Wayland.
Newer Linux distros have libei support, which is required to use Synergy with Wayland.
These are some of the known Linux distros that support Synergy with Wayland through libei.
On these Linux distros, you'll need to switch to Xorg to use Synergy because they do not support libei.
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