Mike Lothian, the developer of an open-source DisplayLink driver called Vino, has received a cease-and-desist letter from Synaptics accusing his driver, described by Phoronix as clean-room reverse-engineered, of infringing two company patents. Lothian has taken the GitHub repository offline but contests the claims, arguing the patents are invalid and that Synaptics itself is a licensee of the Open Invention Network (OIN); Synaptics says DisplayLink is not part of OIN.
The dispute began in July 2026 when Lothian contacted Łukasz Spintzyk, a Synaptics software engineer, for help debugging the driver. Michal Lukaszek, the company’s Strategic Engineering Partnerships Lead, replied weeks later expressing concern that Lothian was attempting to implement the DisplayLink protocol itself, which Synaptics says violates its patents. The company then issued a cease-and-desist letter from its legal department, demanding the removal of the Vino repository and citing patents GB2484736 (Image generation) and GB2485613 (Display control device).
Lothian asked for details on how his work infringed but received no response. When he followed up three weeks later, Synaptics escalated, saying it would bill him “to recoup the cost and effort required to create such documentation of your infringing acts.” Andrew Bateman, Synaptics’ Assistant General Counsel, wrote: “By open sourcing our DisplayLink technology for whatever personal reasons you may have as a ‘hobbyist,’ you will be single-handedly eviscerating DisplayLink's competitive advantage in this crowded market by educating our competitors and other third parties as to how we implement our proprietary technology, which we have gone to great lengths and great expense to prevent.” Bateman added that he encouraged Lothian to publicise the response.
Lothian argues the patents are invalid. “In both cases the independent claims as filed contained no network or transport limitation,” he said. “The claims were granted only after being amended to add delivery of the display data over a ‘general-purpose data network’ (and, for GB2485613, a ‘transport protocol’ with an ‘unpackaging’ step). That added feature was not new.” He also argues that Synaptics is an OIN licensee, although the company says DisplayLink is not part of OIN.
Phoronix reported that the Vino driver was clean-room reverse-engineered, partly developed using AI and written in Rust; Lothian said he used a Claude subscription to help with the effort. Lothian says he remains open to a sensible resolution, but without an agreement the two sides appear headed for a legal confrontation.
The full email thread is available on a Linux Kernel Mailing List page.
Analysis
Why This Matters
- The case tests how patent law applies to clean-room reverse-engineered open-source software, especially when AI tools assist development.
- It highlights the tension between a company’s desire to protect proprietary IP and the open-source community’s interest in interoperability.
- The outcome could affect other hobbyist projects and the use of AI in reverse engineering.
Background
DisplayLink is a technology that allows video output over USB, Ethernet, or other general-purpose networks. Synaptics acquired the technology and holds patents on it. The Open Invention Network is a patent non-aggression community that Linux-related companies join; Synaptics is a licensee, but it argues its DisplayLink patents fall outside the scope.
Key Perspectives
Synaptics: Says Lothian’s work infringes its patents and threatens its competitive advantage; it has threatened to sue and bill Lothian for documentation costs.
Mike Lothian: Argues the patents are invalid because their key limitation (a general-purpose data network) was added after filing and was not novel; also contends Synaptics’ OIN licence should cover the technology.
What to Watch
- Whether Synaptics files a lawsuit or Lothian initiates a patent challenge.
- How the OIN interprets its licence coverage for acquired patents.
- Community response: forks of the Vino code or crowdfunding for legal defence.
Checked
12 claims in this story checked against 1 source: 11 supported.
Show each claim
- SupportedSynaptics sent a cease-and-desist to the creator of an open-source DisplayLink driver.Latest from Tom's Hardware: “Synaptics sends cease-and-desist order to creator of open-source DisplayLink driver”
- SupportedLothian took the Vino repository offline after Synaptics claimed patent infringement.Latest from Tom's Hardware: “Lothian eventually took the GitHub repo containing the Vino driver offline”
- SupportedLothian argues that Synaptics’ patents are invalid.Latest from Tom's Hardware: “The hobbyist claims that Synaptics’ patents are invalid”
- SupportedPhoronix described the Vino driver as clean-room reverse-engineered.Latest from Tom's Hardware: “According to Phoronix , the Vino driver was “clean-room reverse-engineered””
- SupportedLothian argues Synaptics is an OIN licensee, while Synaptics says DisplayLink is not part of OIN.Latest from Tom's Hardware: “He further argues that even though the company says that DisplayLink isn’t part of the Open Invention Network, Synaptics itself is an OIN licensee.”
- SupportedLothian contacted Synaptics software engineer Łukasz Spintzyk in July 2026 for help with driver bugs.Latest from Tom's Hardware: “The story began in July 2026, when Lothian reached out to Łukasz Spintzyk, a software engineer working at Synaptics, to help solve a few bugs he’s been encountering.”
- SupportedMichal Lukaszek replied a couple of weeks later, expressing concern that Lothian was implementing the DisplayLink protocol, which Synaptics said violated its patents.Latest from Tom's Hardware: “Michal Lukaszek, the Strategic Engineering Partnerships Lead at the company, replied a couple of weeks later, saying that the company is concerned that Lothian is attempting to implement the DisplayLink protocol itself, which is a violation of its patents.”
- Partly supportedSynaptics’ legal department sent a cease-and-desist demanding removal of the Vino repository and citing patents GB2484736 and GB2485613.Latest from Tom's Hardware: “This resulted in a cease-and-desist letter from Synaptics’ legal department asking him to take down the Vino GitHub repo, among other things. Synaptics claims that Lothian’s work infringes on two patents: GB2484736 and GB2485613.”
- SupportedLothian asked how his work infringed, received no response, and followed up three weeks later.Latest from Tom's Hardware: “Lothian responded, asking for complete details as to how his work infringes on its patents, but received no response, prompting him to follow up three weeks later.”
- SupportedSynaptics said it would bill Lothian “to recoup the cost and effort required to create such documentation of your infringing acts.”Latest from Tom's Hardware: “telling him that it would be billing Lothian “to recoup the cost and effort required to create such documentation of your infringing acts.””
- SupportedAndrew Bateman wrote that open-sourcing DisplayLink technology would be “single-handedly eviscerating DisplayLink's competitive advantage.”Latest from Tom's Hardware: ““By open sourcing our DisplayLink technology for whatever personal reasons you may have as a ‘hobbyist,’ you will be single-handedly eviscerating DisplayLink's competitive advantage”
- SupportedLothian said the patent claims were amended to add network or transport limitations and that the added feature was not new.Latest from Tom's Hardware: ““In both cases the independent claims as filed contained no network or transport limitation. The claims were granted only after being amended to add delivery of the display data over a ‘general-purpose data network’”
