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Re: [Xen-users] Grub interactive menu missing from Xen PVHVM DomU's 'ser

From: suse . dev
Subject: Re: [Xen-users] Grub interactive menu missing from Xen PVHVM DomU's 'serial console' output. All the other output is there - just the menu is missing?
Date: Tue, 26 Jan 2016 06:21:21 -0800

Hi Ian

On Tue, Jan 26, 2016, at 02:06 AM, Ian Campbell wrote:
> You mean you are either doing "xl create -c <cfg>" or you are doing "xl
> console <domain>" after the domain is running?

I launch with

xl create -c <cfg>

from a terminal I ssh'd into on the host.  That;s where I see all the console 

> > and then the grub2 menu and other output pops up in an X11 (bochs?)
> > window, but that's not what I want.
> FYI you can also use VNC, but that sounds like not what you want either.

Yep.  VNC works too.  I want to get to a shell-only solution though.

> The only diffeence I can see here vs what I would do is that you have
> GRUB_TERMINAL_INPUT and _OUTPUT while I would just use:
>     GRUB_TERMINAL=serial
> I suspect they are equivalent though, or maybe it is distro specific (I use
> Debian).

Yep, they are in this case.

  ‘GRUB_TERMINAL’  If this option is set, it overrides both 

> You have GRUB_HIDDEN_TIMEOUT=0 and TIMEOUT_QUIET=true doesn't that hide the
> menu[0]? I have "GRUB_TIMEOUT=5" but neither of the GRUB_HIDDEN_* options.

I thought not,


    Boot the default entry this many seconds after the menu is displayed, 
unless a key is pressed. The default is ‘5’. Set to ‘0’ to boot immediately 
without displaying the menu, or to ‘-1’ to wait indefinitely.

    Wait this many seconds for a key to be pressed before displaying the menu. 
If no key is pressed during that time, display the menu for the number of 
seconds specified in GRUB_TIMEOUT before booting the default entry. We expect 
that most people who use GRUB_HIDDEN_TIMEOUT will want to have GRUB_TIMEOUT set 
to ‘0’ so that the menu is not displayed at all unless a key is pressed. Unset 
by default.

    In conjunction with ‘GRUB_HIDDEN_TIMEOUT’, set this to ‘true’ to suppress 
the verbose countdown while waiting for a key to be pressed before displaying 
the menu. Unset by default.

but maybe misread.

Changing to


I don't even see the blank space now.  Just a 10 second pause, then the boot 
continues, with output to the console like before.

> What is in your guest configuration file? To have the serial port of an HVM
> guest come out of "xl console" (or "xl create -c") you need serial = "pty"
> in there, although given that you can see the kernel messages you might
> have that already.

Yep.  I already have that.  Like you noticed I already have all the 
full/complete ouput.  No problems there

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