Re: [Xen-users] PV domU using vnc

["Ray Barnes" <tical.net@xxxxxxxxx>]

I'd recommend starting here:
http://lists.xensource.com/archives/html/xen-users/2008-06/msg00169.html

I started a similar thread last week; I still have not solved my
problem.  I did manage to get /dev/fb0 under Debian Lenny/Sid and
Ubuntu Hardy if I remember correctly, but I could never make the
console echo over to the VNC window.  I started a thread on the ubuntu
forums, also to no effect.  Nobody here was able to solve my problem
and I wasn't able to figure it out after playing with it for a week.
If you make any progress that builds on my "success" (if you can call
it that), please let me know.

-Ray


On Thu, Jun 12, 2008 at 10:19 PM, Erdem Bayer <ebayer@xxxxxxxxxxxx> wrote:
> Hi
>
> I have Debian Etch with Xen 3.2 and 2.6.18-6-xen-amd64 installed from 
> etch-backports repository.
>
> I have not managed to use XENFB in any PV domU. Let me describe what I want 
> to accomplish and what I have tried:
>
> I want my PV domU's have a /dev/fb device, and (if possible) VNC KDE access 
> without the need of using vncserver in domU. Therefore I add the following 
> lines to my domU config file:
>
> vfb = ['type=vnc,vnclisten=0.0.0.0,vncdisplay=1']
> extra = 'video=xenfb'
>
> When my domU is started I can see a qemu-dm process is also started. I 
> confirm the vnc is working by looking at the netstat output.
>
> Does that mean XENFB_TOOLS is y and working correctly, I mean will I be able 
> to install a HVM domU with SDL or VNC screen?
>
> But when I start vncviewer from another machine like this:
>
> vncviewer dom0_IP::5901
>
> I only get a vnc screen with a line : "parallel0 console". Why is that?
>
> Also when I log into domU with ssh, I see that /dev/fb device is still 
> missing. The problem is the lack of fb device in domU takes out nearly all my 
> options, as no X server can be run on domU, I can
> not use XDMCP, FreeNX or else.
>
> When I checked the kernel config, I see:
>
> CONFIG_FB_VIRTUAL = m
> CONFIG_FRAMEBUFFER_CONSOLE=y
>
> But I don't see any CONFIG_XEN_FRAMEBUFFER option built either as module or 
> statically.
>
> The only module I found under /lib/modules is vfb and I can successfully 
> probe it in dom0 with:
>
> modprobe vfb vfb_enable
>
> Then I see the /dev/fb is created in dom0. But when I try to do the same on 
> domU, I get some trace errors in dmesg and then the domU does some strange 
> things like not rebooting or halting,
> etc. Also my domU sees the graphic card as "Linux FB device" and not "Xen FB 
> device".
>
> Any help on using XEN FB in PV domU  is greatly appreciated.
>
> Kind Regards
> Erdem Bayer
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>

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