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Re: [Xen-devel] Xen Paravirt Operations Domain 0 Serial Console Problem

To: "Mr. Teo En Ming (Zhang Enming)" <enming.teo@xxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen Paravirt Operations Domain 0 Serial Console Problem
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Mon, 24 Aug 2009 19:44:16 +0300
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On Tue, Aug 25, 2009 at 12:17:53AM +0800, Mr. Teo En Ming (Zhang Enming) wrote:
> Hi All,
> I have tried to configure serial console for Xen hypervisor, dom 0 
> kernel and Linux login but it does not seem to be working.
> Here is my grub configuration for serial console:
> title Fedora (2.6.31-rc6-enming.teo) Serial Console
>         root (hd0,0)
>         kernel /xen.gz iommu=1 com1=115200,8n1 console=com1
>         module /vmlinuz-2.6.31-rc6-enming.teo ro 
> root=/dev/mapper/vg_fedora11_host-lv_root selinux=0 console=ttyS0,115200
>         module /initrd-2.6.31-rc6-enming.teo.img


paste from that page:

Working example grub.conf with serial console output: 

title pv_ops dom0-test (2.6.29-rc7-tip) with serial console
        root (hd0,0)
        kernel /xen-3.3.gz dom0_mem=1024M loglvl=all guest_loglvl=all 
com1=19200,8n1 console=com1
        module /vmlinuz-2.6.29-rc7-tip ro root=/dev/vg00/lv01 console=hvc0 
        module /initrd-2.6.29-rc7-tip.img

> Is the above configuration correct? On my Intel Desktop Board DQ45CB, I 
> have a COM1 header on the PCB and I have connected an external serial 
> port to this header and also enabled COM1 in the BIOS.
> After selecting the above entry in GRUB still on VGA, a cursor at the 
> top left corner of the monitor shows up, which means Xen and Dom 0 
> kernel are booting up on the serial console and not on VGA.
> However, after some time, a login prompt finally displays on my VGA 
> monitor! Isn't it NOT supposed to show up on VGA and should show up in 
> serial console instead?

You also need to have the gettys configured properly.

-- Pasi

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