[Xen-users] Re: Serial Console Problem

["Andrew Lyon" <andrew.lyon@xxxxxxxxx>]

On Thu, Sep 25, 2008 at 3:16 PM, Andrew Lyon <andrew.lyon@xxxxxxxxx> wrote:
> Hi,
>
> I configured serial console on my system today by adding
> com1=115200,8n1 console=vga,com1 to my kernel line in grub:
>
> title Xen 3.2.1 / Linux 2.6.21-xen
> root (hd0,0)
> kernel /xen.gz vtd=1 com1=115200,8n1 console=vga,com1
> module /vmlinuz-2.6.21-xen root=/dev/sda2
>
> The xen bootup messages are logged to the serial and vga consoles, and
> initially the kernel messages are also displayed, but it stops after
> "Freeing unused kernel memory: 208k freed"
>
> I am able to login through agetty on ttyS0, so the serial port is
> still working, it just stops logging after that line.
>
> CONFIG_FB is disabled, I read that sometimes framebuffer console can
> break serial console.
>
> CONFIG_VGA_CONSOLE=y
> CONFIG_VGACON_SOFT_SCROLLBACK=y
> CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=256
>
> Andy
>

It seems that the serial console is completely dead after  "Freeing
unused kernel memory: 208k freed", I cannot access the sysreq commands
and which I need to debug a lockup problem.

Is there something wrong with the way I have  configured the serial console?

Andy

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