Playing with kgdb on -current/amd64, on the remote, I see com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo com1: kgdb
In /etc/remote (on the remote), I have com1:dv=/dev/dty01:br#115200:pa=none:dc: to go with options KGDB_DEVNAME="\"com\"",KGDB_DEVADDR=0x2f8,KGDB_DEVRATE=115200 and # tip com1 tip: /dev/dty01: Device busy tip: link down As I wasn't in the debugger, kgdb shouldn't be using com1? (Why busy?) Correct to use dty01 rather than tty01? Cheers, Patrick