Re: XL Console: Accessing DomU Guis?

[Paul Leiber <paul@xxxxxxxxxxxxxxxx>]

Am 07.01.2024 um 20:25 schrieb zithro:
> Hi,
>
> On 06 Jan 2024 20:18, John L. Poole wrote:
>
> >  > My understanding is that the Dom0 _console_ simply can't display
> >  > the GUI from the DomU. "xl console" does what it says, it shows
> >  > the console of the DomU. The output of the DomU console after starting
> >  > xinit shows that this is working as intended. "xl create" with
> >  > the "-c" option is equivalent to using "xl console". Also, a Dom0
> >  > console is not "activated" by the DomU in any way, I think a DomU
> >  > influencing the Dom0 in such a way would violate the security aspect
> >  > of virtualization.
> > Correct.  I have not be careful with my terminology.  What I envision
> > is running Xfce in Dom0 as user jlpoole, and then within the Xfce
> > session, launching a console within and executing the command:
> > "sudo xl console [X]".  This procedure should be distinguished
> > from being in the console window at boot time and trying therein
> > "sudo xl console [X]" where I am not operating over an
> > already-launched gui.
> I think you misunderstand the way it works.
> "xl console", or more generally a "console", is just a *text* interface, 
> it cannot display a GUI, only a TUI (Text User Interface).
> In a way, the console can only display what would be displayed on 
> tty1-tty6, but not tty7 (where the GUI usually resides).
> (In effect, [xl] console displays tty1, and tty1 only).
>
> For graphics *and* without installing anything in the domU, you have 2 
> choices: VNC or SDL.
Just for completeness' sake: At least for HVM DomUs, there is also 
SPICE, which I have been using more often than VNC, lately.
https://wiki.xenproject.org/wiki/SPICE_support_in_Xen

Paul