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[Xen-users] dom0 no longer showing serial console output

  • To: <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Carb, Brian A" <Brian.Carb@xxxxxxxxxx>
  • Date: Thu, 18 Oct 2007 12:19:33 -0500
  • Delivery-date: Thu, 18 Oct 2007 10:20:23 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcgRqw0qkZl+RkpcSbmNiYbZPtSefA==
  • Thread-topic: dom0 no longer showing serial console output

Running Xen unstable on SLES10 x64. Serial output was working correctly in changeset 15837 (the xen boot output was directed to both the standard vga console and the serial console).  I have recently upgraded to changeset 16112 and now I do not get any output on the serial console.
In my menu.lst I have:

    root (hd0,1)
    kernel /boot/xen.gz com1=115200,8n1 apic_verbosity=debug
    module /boot/vmlinuz-xen root=/dev/sda2 vga=0x314 resume=/dev/sda1 splash=verbose showopts debug=y
    module /boot/initrd-xen
I have tried adding "console=ttyS0" but this doesn't seem to produce any output either.  The command
  echo "test" >/dev/ttyS0
errors with
  -bash: /dev/ttyS0: No such device or address
but /dev/ttyS0 does exist.
btw, serial output does show up when I boot the SLES kernel. Its entry is:
    root (hd0,1)
    kernel /boot/vmlinuz root=/dev/sda2 vga=0x314  resume=/dev/sda1 splash=verbose showopts console=ttyS0,115200n8 console=tty0 debug
    initrd /boot/initrd
I suspect the xen serial console code has changed recently. Can anyone point me to some settings that will work. Thanks

brian carb
unisys corporation - malvern, pa 

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