On Dec 21, 2007 12:35 PM, James B. Byrne byrnejb@harte-lyne.ca wrote:
# setserial -g /dev/ttyS* Cannot get serial info: Invalid argument /dev/ttyS1: No such device or address /dev/ttyS2: No such device or address /dev/ttyS3: No such device or address # # dmesg | grep tty Xen virtual console successfully installed as ttyS0
Well my primary guess is that you are running a Xen kernel which disables the serial tty's for its own 'tty' devices and so that guests can grab 'real' serial ports. Other items it could be is that the BIOS has them disabled or that the BIOS has a 'bug' that needs a patch.
http://wiki.xensource.com/xenwiki/InstallationNotes
Looking at threads referencing this.. you can either have a kernel where Xen machines can have virtual serial access or you can have external serial ports.. in the later case you may need to rebuild the kernel, but you should try first booting with
xencons=off
to see if it lets the other serial ports be seen. If it doesnt then you will need to rebuild the kernel as per installation notes.