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Re: Help needed running an X11 environment inside a DomU (Re: [Xen-user

To: Martin Troester <TroyMcClure@xxxxxx>
Subject: Re: Help needed running an X11 environment inside a DomU (Re: [Xen-users]Creating a paravirtualized guest with Xen 3.4.1 and Centos 5.3 (64bit))
From: "Fajar A. Nugraha" <fajar@xxxxxxxxx>
Date: Sat, 26 Sep 2009 10:04:31 +0700
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On Sat, Sep 26, 2009 at 4:16 AM, Martin Troester <TroyMcClure@xxxxxx> wrote:
> James,
> thanks for that explanation. I have a DomU kernel with FB support, and I am
> now able to configure X to use the /dev/fb0 device for graphical output
> (although only 800*600 at the moment, but let's see how to get that
> configured properly).

Isn't it hardcoded to 800x600?

> James Dingwall wrote:
>> You need to have CONFIG_XEN_FRAMEBUFFER support in the domU kernel and
>> create a virtual framebuffer device in the domU config vfb = [
>> 'type=vnc,vncunused=1' ] (see the example configuration files for other
>> parameters).  X then needs to use the fbdev driver.  In this example you
>> would connect to the graphical interface with a VNC client.
> As stated above, that works - but it requires me to have a special Xorg.conf
> when using my DomU as a PV image, and another Xorg.conf for HVM use, as both
> use different HW devices.
> Without this requirement, I could boot up the unmodified VM without further
> modifications from outside (when having a distro which comes with xvc0 being
> configured correctly in /etc/inittab and /etc/securetty), but without a
> modified Xorg conf, I will not be able to start X in the PV guest. So at
> some point a modification inside the VM has to happen to migrate a formerly
> HVM guest to PV.

Perhaps something like vnc/xrdp/NX would be more suitable.


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