I'm trying to connect to ROS in VirtualBox VM over serial port but it doesn't really seem to work. Did anyone manage to create such setup? When I'm connecting to ROS over certain serial it doesn't respond with anything even though /system console is enabled on all ports. I tried both host to guest and guest to guest scenario. Neither of them respond with anything. I tried "raw file" console dump but I don't see boot log written out to serial either.
I followed this tutorial for guest guest
https://www.howtoforge.com/how-to-set-u ... virtualbox
And this for host guest
https://tech-itcore.pl/2012/07/10/virtu ... rial-port/ (sorry I couldn't find anything english)
I also noticed that actually CHR is using serial port to display standard VM display in first place. After disabling serial port 0 VM becomes completely deaf and I can't access it using VM monitor, VirtualBox monitor is just blank (after reboot boot log stays on screen). As I disabled all network based configuration options VM becomes "read only" however it still functions properly as router. And disabling serial port 0 doesn't "enable" VBox serial port as I thought maybe there's some limit to at most 1 active serial or something.