Re: [Xen-devel] Serial console problem with Xen 3.0

["Michael Paesold" <mpaesold@xxxxxx>]

Stephen C. Tweedie wrote:
> On Wed, 2006-04-05 at 00:40 -0400, Amitayu Das wrote:
>
> > 1. I can boot normal Linux FC4 kernel and direct its output to serial
> > console (and see the messages in a separate monitor) using the options
> > as mentioned in the grub.conf.
> >     If I do the exactly the same (meaning, whatever you can see as
> > uncommeted lines in the xen-related portion of the grub.conf),
> >     I can't see the messages in the separate monitor.
> Right, because you commented out the xen.gz com1=... line, so there's no
> HV serial console.  You need that enabled.
>
> > 2. If I uncomment the third line in the following:
> > #       kernel /xen.gz dom0_mem=131072 com1=9600,8n1
> > then Xen even does not boot up.
> I've seen this a lot --- for me, adding "sync_console" to that xen.gz
> line cures it.  Does that help for you?
Me too. Adding "sync_console" at least repaired the console *output*. I 
still have the problem that keyboard input does not reach linux, as it 
seems. Here is my config:
serial --unit=0 --speed=38400 --word=8 --parity=no --stop=1
terminal --timeout=10 serial console
title CentOS (2.6.16-2.EL4xen0)
       root (hd0,0)
       kernel /xen.gz-2.6.16-2.EL4 com1=38400,8n1 conswitch=s sync_console
       module /vmlinuz-2.6.16-2.EL4xen0 ro root=LABEL=/1 console=tty0 
console=ttyS0,38400n8
       module /initrd-2.6.16-2.EL4xen0.img

Using the same config for native linux gives me a working console access 
(NB. I have agetty in inittab). In Xen/Linux I get all boot messages (from 
linux and Xen), but when I hit the login prompt, no keyboard input is 
excepted. I am using minicom on the other side of the cable.
Additionally, pressing CTRL-A (or CTRL-S after changing the key) three times 
does *not* give me access to the Xen console.
Any additional hints how I could get this working? (NB. this is 
xen-unstable, just a two days old, on x86 with an Intel 7210 board).
Best Regards,
Michael Paesold 

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