Xen users - Feb 2011 - Is grub menu supposed to work over the serial console, in Xen 4.0.1?

Xen-users,

I am having trouble getting to the grub boot menu, via a serial console. The
serial console is working and even gives me "Press any key to
continue." many times very nicely, but when I press the any key, I get no
menu and grub eventually times out and boots the default hypervisor. I am using

      terminal --timeout=10 console serial

on a machine that has a serial port, using a null modem cable.

The menu works fine over the directly connected keyboard and monitor, so I am
sure it is not a broken menu per se.

I have tried lots of combinations of grub set up, all with the same results or
worse, e.g with and without "sync_console", putting "serial"
before "console", leaving either "console" or
"serial" out. I also tried a number of different line speeds from
115200 all the way down to 9600, but nothing seems to make a difference. I could
not find anything in the Xen wiki about grub menu over serial, and nothing
googled either.

Before I try any more, does anyone know if the grub menu is even supposed to
work over serial, for Xen 4.0.1?

Sincerely,

John
----
What is the formal meaning of the one-line program
#include "/dev/tty"

J.P. McDermott				building 12
Code 5542					mcdermott@itd.nrl.navy.mil
Naval Research Laboratory	voice: +1 202.404.8301
Washington, DC 20375, US	fax:   +1 202.404.7942








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Do you also have a line in grub.conf of the form

serial --unit=0 --speed=115200
terminal --timeout=10 serial console

I don''t have xen 4.0.1 myself and so can''t test it with that,
but this functionality is part of grub and shouldn''t matter
whether you are using Xen or not.  At this state you have not
loaded anything that is xen-dependent.

Steve Timm



On Thu, 3 Feb 2011, John McDermott (U.S. Navy Employee) wrote:
> Xen-users,
>
> I am having trouble getting to the grub boot menu, via a serial console.
The serial console is working and even gives me "Press any key to
continue." many times very nicely, but when I press the any key, I get no
menu and grub eventually times out and boots the default hypervisor. I am using
>
>      terminal --timeout=10 console serial
>
> on a machine that has a serial port, using a null modem cable.
>
> The menu works fine over the directly connected keyboard and monitor, so I
am sure it is not a broken menu per se.
>
> I have tried lots of combinations of grub set up, all with the same results
or worse, e.g with and without "sync_console", putting
"serial" before "console", leaving either
"console" or "serial" out. I also tried a number of
different line speeds from 115200 all the way down to 9600, but nothing seems to
make a difference. I could not find anything in the Xen wiki about grub menu
over serial, and nothing googled either.
>
> Before I try any more, does anyone know if the grub menu is even supposed
to work over serial, for Xen 4.0.1?
>
> Sincerely,
>
> John
> ----
> What is the formal meaning of the one-line program
> #include "/dev/tty"
>
> J.P. McDermott				building 12
> Code 5542					mcdermott@itd.nrl.navy.mil
> Naval Research Laboratory	voice: +1 202.404.8301
> Washington, DC 20375, US	fax:   +1 202.404.7942
>
>
>
>
>
>
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>
-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm@fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Group Leader.
Lead of FermiCloud project.

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Steve,

Yes, thanks, my grub.conf is ok, otherwise my serial connection would not be
working at all. Everything else about my serial connection works fine and has
for months.

John
----
On Feb 3, 2011, at 1:10 PM, Steven Timm wrote:
> Do you also have a line in grub.conf of the form
> 
> serial --unit=0 --speed=115200
> terminal --timeout=10 serial console
> 
> I don''t have xen 4.0.1 myself and so can''t test it with
that,
> but this functionality is part of grub and shouldn''t matter
> whether you are using Xen or not.  At this state you have not
> loaded anything that is xen-dependent.
> 
> Steve Timm
----
What is the formal meaning of the one-line program
#include "/dev/tty"

J.P. McDermott				building 12
Code 5542					mcdermott@itd.nrl.navy.mil
Naval Research Laboratory	voice: +1 202.404.8301
Washington, DC 20375, US	fax:   +1 202.404.7942








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I use serial connection with grub2 and xen-4.0.1 without any problem.

Darkbasic

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