I’m also facing the same (or a similar) problem with our two Tobii REX devices. The symptoms are:
– Failure to connect to tobii REX with GazeSDK on Linux
– Device gets IP address and is pingable
– fwupdate <address> –info-only returns Failed to get device info
– fwupdate <address> <binary> –no-version-info locks up
Is there a known cause and a solution for this problem?