ttyc/ttyd should be an allowed console device
Currently ttya and ttyb are the only ttys, which are allowed to be a console device.
This is a problem for none-SUN machines like SuperMicro MB X8DAH+-F (WPM450 BMC) driven ones, because here IPMI SOL is only possible, if the related BMC port is set to 0x3e8 (ttyc/COM3).
bdha found a workaround by attaching a "VT" aka ttymon to the related tty (e.g. ttyc) so that IPMI SOL works, but of course this has nothing to do with /dev/console ...
As far as I can see, a fix involves the following files (and some related includes), only:
Updated by Jon Strabala over 10 years ago
Good news there is now a webrev available for those of us that absolutely need "ttyc" prepared by Gary Mills on 2012-Feb-14 located at http://cr.illumos.org/view/lsy0hhs4/illumos1469/ .
It works for me in a nightly build (SuperMicro X9SCA-F), but please note there is still a review process going on and the code may be refactored prior to an RTI (refer to: http://comments.gmane.org/gmane.os.illumos.devel/6059 for discussion and details on how to use it e.g. grub and ipmitool ).
Updated by Jon Strabala about 10 years ago
An updated webrev prepared by Gary Mills on 2012-Mar-10 located at It still works for me in a 2012-03-19 nightly build (on a SuperMicro X9SCA-F) http://cr.illumos.org/view/jw8opke7/illumos1469-2/ . more details can be found at the URL http://thread.gmane.org/gmane.os.illumos.devel/6469 .