Re: [Xen-users] Cannot access to PV domU via VNC

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Sat, Mar 01, 2014 at 05:47:27PM +0900, Jeongseok Son wrote:
> Thank you so much. I did a stupid mistake. Now I set the vnclisten
> option as 0.0.0.0 then I can connect to it.
> 
> However, I could only see a black screen on VNC client so I tried to
> install x window system.
> 
> apt-get install x-window-system
> 
> And then I ran "startx" command but I got this error message.
> 
> (EE) open /dev/fb0: No such file or directory
> (EE) No devices detected.
> 
> Fatal server error:
> no screens found
> 
> Why frame buffer device is not enabled in PV domU? Ho can solve this issue?
> 

I've never used that feature so I cannot help with this. But I would
suggest you check your kernel if it has Xen PV framebuffer enabled.

Wei

> On Thu, Feb 27, 2014 at 11:44 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> > On Wed, Feb 26, 2014 at 11:47:39PM +0900, Jeongseok Son wrote:
> >> Hello, I have to use graphical interface in PV domU so I tried to
> >> connect to domU via VNC.
> >>
> >> I'm currently using Xen Hypervisor 4.3.1. I installed Ubuntu Lucid
> >> (10.04) PV domU with xen-create-image. I can use hvc0 console of domU
> >> (with xl console command) but cannot connect to VNC console.
> >>
> >> The following is my xen configuration for PV domU.
> >>
> >> # Kernel + memory size
> >> kernel = '/boot/vmlinuz-3.9.4+'
> >> ramdisk = '/boot/initrd.img-3.9.4+'
> >>
> >> vcpus       = '2'
> >> memory      = '2048'
> >>
> >> # Disk device(s)
> >> root        = '/dev/xvda2 ro'
> >> disk        = [
> >>                   'file:/path/to/disk.img,xvda2,w',
> >>                   'file:/path/to/swap.img,xvda1,w',
> >>                  ]
> >>
> >> #  Hostname
> >> name        = 'pv-ubuntu'
> >>
> >> # vfb
> >> vfb         = [ "vnc=1, vncpasswd='', vncdisplay=1" ]
> >>
> >> #  Behaviour
> >> on_poweroff = 'destroy'
> >> on_reboot   = 'restart'
> >> on_crash    = 'restart'
> >>
> >> With netstat -a command, the following line is printed so I think Xen
> >> listens the connections.
> >>
> >> Proto Recv-Q Send-Q Local Address           Foreign Address         State
> >> tcp        0         0        localhost:5901          *:*
> >>                 LISTEN
> >>
> >
> > That's because your vnc is listening on 127.0.0.1 only.
> >
> > Please have a look at xl manpage for the "vnclisten" option.
> >
> > Wei.
> >
> >> But when I attempt to connect to it using VNC client, I got
> >> "Connection to host xxx.xxx.xxx.xxx::5901 was closed." message.
> >>
> >> I successfully worked with GUI Interface via VNC in HVM domU (Both
> >> Ubuntu 12.04 Desktop and Server).
> >> Why it doesn't work in PV domU? Are there anything to set up in PV
> >> domU to make it work?
> >> I really appreciate any help you can provide.
> >>
> >> _______________________________________________
> >> Xen-users mailing list
> >> Xen-users@xxxxxxxxxxxxx
> >> http://lists.xen.org/xen-users

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