[Xen-users] PV DomU VNC screen black and Xorg error

[Paul Schulze <avlex@xxxxxxx>]

Hey everyone,

I tried to get framebuffer VNC working in my PV DomU because I need  
graphical console access, but I keep getting a completely black  
screen in the VNC viewer (so VNC is active, qemu-dm is running) and  
this error message from Xorg:
---
(EE) FBDEV(0): FBIOPUT_VSCREENINFO succeeded but modified mode
(EE) FBDEV(0): mode initialization failed

Fatal server error:
AddScreen/ScreenInit failed for driver 0
---

The system is an AMD Athlon X2 with 4GB RAM, running Hardy and kernel  
2.6.24-18-xen (xen framebuffer and keyboard support built in) from  
the Ubuntu repository. The DomU is running Hardy with the same kernel  
as well and was created using xen-tools. I changed this in the config  
file:
---
vfb = [ "type=vnc,vncunused=1,vnclisten=xx.xx.xx.xx,vncpasswd=xxxxx" ]
extra = '2 console=xvc console=tty'
---

The /etc/X11/xorg.conf looks like this:
---
Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "kbd"
        Option          "XkbRules"      "xorg"
        Option          "XkbModel"      "pc105"
        Option          "XkbLayout"     "de"
EndSection

Section "InputDevice"
        Identifier      "Xen Mouse"
        Driver          "mouse"
        Option          "Protocol"      "PS/2"
        Option          "Device"        "/dev/input/mouse0"
EndSection

Section "Device"
        Identifier      "Xen Framebuffer Video Device"
        Driver          "fbdev"
        Option          "fbdev"                 "/dev/fb0"
EndSection

Section "Monitor"
       Identifier      "No Monitor"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Monitor         "No Monitor"
        Device          "Xen Framebuffer Video Device"
EndSection

Section "ServerLayout"
        Identifier      "Default Layout"
        Screen          "Default Screen"
        InputDevice     "Xen Mouse"
EndSection
---

Can someone please tell me what I am doing wrong or if there is a  
better way to get X11 working on a PV guest.
Thanks,


Paul.

--
Paul Schulze
avlex@xxxxxxx
Public Key: http://solaris-net.dyndns.org/keys/key_avlex.asc

"Making mistakes is human,
but to really fuck things up you need Computers"



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