Xen users - Jul 2007 - Show DomU login dialog instead of Dom0''s

Hello,

is it possible to login into a DomU (Windows) without beeing logged in 
in the Dom0 on the same PC where Xen runs? So I want to have something 
like the Windows login screen on e. g. tty2 so I do not need to login 
twice (first in Dom0 and the second one in the DomU).

Thanks for help,
Markus


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> is it possible to login into a DomU (Windows) without beeing logged in
> in the Dom0 on the same PC where Xen runs? So I want to have something
> like the Windows login screen on e. g. tty2 so I do not need to login
> twice (first in Dom0 and the second one in the DomU).
You''d want to auto-start the Windows domU at boot time.  You can do
that by
enabling the xendomains init script, and symlinking the config file for the 
Windows domU into /etc/xen/auto, I believe.  I''m not sure what is done
for
Xend managed domains, though.

Then you''d want to alter the init scripts of dom0 to start a fullscreen
X
server running a VNC viewer (or direct framebuffer viewer) attached to the 
guest.

e.g. you could put something in /etc/rc.local like:

#!/bin/sh

X :1 &
vncviewer -display :1 -fullscreen localhost:<vncdisplay>

So that you''ll start up a second X server and get a VNC viewer running
on it
attached to the domain.  You might need to mess around with the options a bit 
because I made them up ;-)

Once you''ve done that you''ll be able to switch between the
ordinary TTYs,
dom0''s login screen (usually on X display :0, ctrl+alt+f7) and the
domU''s
login screen via VNC.

How does that sound?

Once you''ve got that working you can always try more complicated
setups.  e.g.
run a compositing manager like compiz and arrange to have a login screen for 
each domU be on a different side of the cube.  You could even have a login 
screen for dom0 be on one side of the cube if you set it up right :-)

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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I tried this and it looks like as it will work but I have still some 
problems.
I boot my system like every day and run the commands provided:

X :1 vt1 &
vncviewer -display :1 -FullScreen localhost &

and everything works fine. I have my Windows running on tty1 and the 
Dom0 on tty7 as I wanted it. But using the same commands in 
/etc/rc.local the vncviewer says that he could not connect to the 
server. Sometimes after this error I cannot use my PC locally and I have 
to kill all running X servers via a ssh connection.
Maybe the hvm is not running when the commands from rc.local are 
executed but in my mind it should because rc.local is the last script 
running during boot time.

The second thing which is not that important (maybe I can use another 
implementation of vnc) is the point curser shown in addition to the 
native cursor of Windows. The problem is that both cursors do not have 
the same speed so sometimes the X cursor stops at the border of the 
screen and the Windows cursor is elsewhere on the desktop. I tried 
DotWhenNoCursor=0 but it had no effect.

Greetings,
Markus


Mark Williamson schrieb:
>> is it possible to login into a DomU (Windows) without beeing logged in
>> in the Dom0 on the same PC where Xen runs? So I want to have something
>> like the Windows login screen on e. g. tty2 so I do not need to login
>> twice (first in Dom0 and the second one in the DomU).
> 
> You''d want to auto-start the Windows domU at boot time.  You can
do that by
> enabling the xendomains init script, and symlinking the config file for the
> Windows domU into /etc/xen/auto, I believe.  I''m not sure what is
done for
> Xend managed domains, though.
> 
> Then you''d want to alter the init scripts of dom0 to start a
fullscreen X
> server running a VNC viewer (or direct framebuffer viewer) attached to the 
> guest.
> 
> e.g. you could put something in /etc/rc.local like:
> 
> #!/bin/sh
> 
> X :1 &
> vncviewer -display :1 -fullscreen localhost:<vncdisplay>
> 
> So that you''ll start up a second X server and get a VNC viewer
running on it
> attached to the domain.  You might need to mess around with the options a
bit
> because I made them up ;-)
> 
> Once you''ve done that you''ll be able to switch between
the ordinary TTYs,
> dom0''s login screen (usually on X display :0, ctrl+alt+f7) and the
domU''s
> login screen via VNC.
> 
> How does that sound?
> 
> Once you''ve got that working you can always try more complicated
setups.  e.g.
> run a compositing manager like compiz and arrange to have a login screen
for
> each domU be on a different side of the cube.  You could even have a login 
> screen for dom0 be on one side of the cube if you set it up right :-)
> 
> Cheers,
> Mark
> 
-- 
Dipl.-Inform. Med. Markus Mehrwald
Institut für Prozessrechentechnik, Automation und Robotik
Medizin-Gruppe
Universität Karlsruhe (TH)
Gebäude 40.28, Zimmer 110
Engler-Bunte-Ring 8
76131 Karlsruhe

Fon: +49 (721) 608-7113
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