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

[Jeongseok Son <invictusjs@xxxxxxxxx>]

Thank you for your reply. I turned on CONFIG_FB_VIRTUAL in kernel
compile option but it didn't work.

I solved this issue by installing Ubuntu Desktop on the disk image
file using HVM domU firstly, and then creating PV domU with that disk
image.
I used pygrub without specifying kernel and ramdisk images in the
configuration file. It works well.

I really appreciate your help.
Thank you so much!

On Mon, Mar 3, 2014 at 6:45 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> 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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