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[Xen-devel] Unable to switch input to xen from serial console

To: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Unable to switch input to xen from serial console
From: Sandesh <sandesh.ahiremath@xxxxxxxxx>
Date: Wed, 02 Jul 2008 18:42:04 +0530
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Hi all,
  
  When i do 'xm dmesg' the last statement says  "*** Serial input ->
DOM0 (type 'CTRL-a' three times to switch input to Xen)" (i have no clue
what's that supposed to mean??) But when i press ctrl-a three times at
the serial console, nothing happens. 
  Iam using minicom to connect to the serial port of xen machine. Once
xen machine is booted i get the login prompt on the serial console. So i
dont think there is any problem with the serial setup.

My grub.conf is as below
title Fedora Core (2.6.18.8-xen-kdb)
        root (hd0,5)
        kernel /boot/xen-3.2.0.debug.gz console=com1,vga com1=115200,8n1
        module /boot/vmlinuz-2.6.18.8-xen.kdb ro root=LABEL=/1 rhgb quiet 
console=tty1 console=ttyS1,115200,8n1
        module /boot/initrd-2.6.18.8-xen.img

My actual purpose is to break into xen hypervisor kdb. As per the instruction
ctrl-\ is supposed to give me the xkdb> prompt. But when i press ctrl-\ at the
serial console nothing happens. So am assuming the problem is related to me not 
able
to switch to xen input from serial console in the first place.


thanks,
  Sandesh


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