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xen-users
RE: [Xen-users] dom0 no longer showing serial console output
>>Try adding "xencons=ttyS" as well. This'll tell the Xen console to
appear as ttyS.
>>It's probably now appearing as /dev/xvc0 at the moment which may be
why your setup wasn't working anymore.
>>Alternatively you could do console=/dev/xvc0 directly.
I tried adding "console=ttyS0 xencons=ttyS" and this makes the "echo"
command not fail but I still see no output from it or from xen on the
serial console.
Also tried the console=/dev/xvc0 but that doesn't seem to change
anything. In this case, what binds "console" to the serial port?
Should I be concerned about what's on or off in inittab, or is the
echoing of the xen boot messages occurring before we're looking at
inittab?
Any other suggestions?
brian carb
unisys corporation - malvern, pa
-----Original Message-----
From: M.A. Williamson [mailto:maw48@xxxxxxxxxxxxxxxx] On Behalf Of Mark
Williamson
Sent: Thursday, October 18, 2007 1:27 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Cc: Carb, Brian A
Subject: Re: [Xen-users] 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.
Try adding "xencons=ttyS" as well. This'll tell the Xen console to
appear as ttyS. It's probably now appearing as /dev/xvc0 at the moment
which may be why your setup wasn't working anymore.
Alternatively you could do console=/dev/xvc0 directly.
Let me know if this works or if we need to do some further fault
finding!
Cheers,
Mark
> 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
--
Dave: Just a question. What use is a unicyle with no seat? And no
pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
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