Re: [Xen-users] Accessing console for Xen 4.0 with 2.6.31 pvops kernel on Dell Poweredge R610

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Jul 21, 2010 at 02:14:05AM -0400, Adit Ranadive wrote:
>    The nomodeset parameter didnt work either. One thing I didnt mention was
>    that I could see the Xen bootup messages before and now but cannot see the
>    linux boot up messages. Is there anything I need to enable in the linux
>    config for the console to be visible?
>    There maybe something funky with what the pvops kernel is doing versus the
>    older pv kernel since I can see the messages for the older one.
>

grub.conf like this works for me:

title        Xen 4.0, dom0 Linux kernel 2.6.32.12
root         (hd0,0)
kernel       /boot/xen-4.0.gz dom0_mem=512M
module       /boot/vmlinuz-2.6.32.12 root=/dev/sda1 ro nomodeset
module       /boot/initrd.img-2.6.32.12

That gives me VGA text console, and I can see both Xen and dom0 kernel boot 
messages.

>    Serial isnt an option since the machine is not physically accessible to
>    me.
> 

You could use SOL (Serial Over Lan), provided by the Dell iDRAC.
http://wiki.xensource.com/xenwiki/XenSerialConsole

-- Pasi

>    Thanks,
>    Adit
> 
>    On Tue, Jul 20, 2010 at 8:24 AM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
> 
>      On Sun, Jul 18, 2010 at 08:43:40PM -0400, Adit Ranadive wrote:
>      >    I am currently using a Dell PowerEdge server R610 with Xen 4.0
>      installed
>      >    and the 2.6.31.13 pvops kernel.
>      >    I am accessing the server console using the iDRAC KVM feature of
>      the dell
>      >    management console.
>      >    Does anyone know how to configure the console option in the grub
>      menu so
>      >    that all the boot messages can be seen on the
>      >    mgmt console?
>      >    Currently I can view only the Xen bootup messages if I dont specify
>      the
>      >    console=xxx option on the kernel line. I cant see any of
>      >    the linux kernel boot up messages. Specifying console=xxx on the
>      kernel
>      >    module line doesnt work either.
>      >    Has anyone worked with this sort of config before? Is there
>      anything else
>      >    I can specify on the kernel/module line so that all
>      >    the bootup messages are visible?
>      >
>      >    Below is my grub menu:
>      >    title Red Hat Enterprise Linux Server (2.6.18-164.6.1.el5)
>      >        root (hd0,0)
>      >        kernel /vmlinuz-2.6.18-164.6.1.el5 ro root=/dev/vg1/root
>      >        initrd /initrd-2.6.18-164.6.1.el5.img
>      >
>      >    title Xen 4.0 - Linux 2.6.31.13 pvops
>      >        root (hd0,0)
>      >        kernel /xen.gz noreboot loglvl=all guest_loglvl=all iommu=1
>      >        module /vmlinuz-2.6.31.13 ro root=/dev/vg1/root loglevel=10
>      swiotlb=force earlyprintk=xen console=hvc0
>      >        module /initrd-2.6.31.13.img
>      >
> 
>      That should work. You could try adding "nomodeset" parameter, to disable
>      the kernel modesetting (KMS) stuff.
>      Maybe that messes up the console.
> 
>      You could also enable the SOL serial console:
>      [2]http://wiki.xensource.com/xenwiki/XenSerialConsole
> 
>      -- Pasi
>      >    title Xen 4.0 - Linux 2.6.18.8
>      >        root (hd0,0)
>      >        kernel /xen.gz loglvl=all guest_loglvl=all
>      >        module /vmlinuz-2.6.18.8-xen0 ro root=/dev/vg1/root
>      earlyprintk=xen
>      >        module /initrd-2.6.18.8-xen0.img
>      >
>      >    P.S.: Ive tried using the 2.6.18.8 kernel and that seems to show
>      >    everything fine on the console.
>      >
>      >    Thanks,
>      >    Adit
> 
>      > _______________________________________________
>      > Xen-users mailing list
>      > [3]Xen-users@xxxxxxxxxxxxxxxxxxx
>      > [4]http://lists.xensource.com/xen-users
> 
> References
> 
>    Visible links
>    1. mailto:pasik@xxxxxx
>    2. http://wiki.xensource.com/xenwiki/XenSerialConsole
>    3. mailto:Xen-users@xxxxxxxxxxxxxxxxxxx
>    4. http://lists.xensource.com/xen-users

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