On Fri, 2023-01-06 at 19:32 -0500, Gabriel L. Somlo wrote: > > I *can* run any tests y'all might suggest to further debug the state > of the system. But at this point I really do believe there is (or > should be :) a way to extend the timeout during initial boot to force > the system to wait for /dev/ttyLXU0 to become available (via udev?). > Have you tried systemd.default_timeout_start_sec= ? Martin