Synaptics patent claims stop work on DisplayLink drivers

Mike Lothian’s Rust-based Vino DRM/KMS driver for DisplayLink docks has stalled after Synaptics, which acquired DisplayLink in 2022, asserted patent infringement and demanded he stop his “unauthorized implementation” of DisplayLink technology, with the threat of costly penalties. Lothian began the project after the proprietary DisplayLink Manager software, distributed only as an x86 binary via an Ubuntu APT repository, kept crashing on Linux; he posted the first Vino patch series as an RFC to the kernel’s dri-devel list on June 17 and opened an issue on the open-source EVDI GitHub repository the same day. He sought help on the DL3 control-plane engagement sequence, received guidance from Danilo Krummrich on reworking the driver to use Rust KMS bindings, but no answer to his specific blocker. The dispute matters because Linux users of Synaptics-based Dell docks may remain without feature parity with other platforms, and because a legal objection could deter other independent driver work. What to watch next is whether Synaptics softens its stance or offers technical guidance, and whether Vino continues as an out-of-tree project or the EVDI module remains the only supported path.