dual console on amd64

Lloyd <[email protected]> Sat, 13 Jun 2026 00:20:18 +0000

Newsgroups	gmane.os.openbsd.misc
Message-ID	<OQaMAgZqezZap6hchFOEschQtPxgAnTevIOCWuYd2fpZO3TH1bDRSJLBGcFnt3o6qwow5wJdoD1JFcH5iFPY3xfyhFYgDytXoDoSZ254XtQ=@proton.me>

Does OpenBSD support dual-console on amd64? E.g. where kernel boot messages
are sent to both the VGA and serial console simultaneously?

Under Linux this is possible by passing multiple console= arguments to the
kernel at boot time.

As far as I know this is not currently possible on OpenBSD (without builtin
BIOS support for console-redirection), it's an either-or choice at boot,
but maybe someone knows of a secret method.

Regards
Lloyd