d1/ Prior to posting your hardware problem, please search that there isn't already a thread that have resolved or dealt with the issue.
2/ If the above is false, then check that your
hardware is supported. I maintain that thread and update it regularly if there are new changes.
3/ If your hardware is supported, then start a new thread and detail your problem in a relevant manner so that hopefully others can help you resolve it.
4/ If your hardware is not supported, you might get an answer on
FreeBSD System Hardware forum,
FreeBSD Peripheral Hardware forum, and
FreeBSD Hardware Listserv.
5/ Finally, if nothing else helps and your trouble is due to a bug, please submit
a bug report.
README First
Linear Mode
