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X environment not able to start in DomU, /dev/fb0 missing

This document (3172163) is provided subject to the disclaimer at the end of this document.

Environment

Novell SUSE Linux Enterprise Desktop 10
Novell SUSE Linux Enterprise Server 10
Novell SUSE Linux Enterprise Server 10 Service Pack 1
Novell SUSE Linux Enterprise Desktop 10 Service Pack 1
Novell Open Enterprise Server 2 (Linux based)

Situation

When updating a DomU to SP1 that was created on SLE10 the graphical output in the virtual machine will not work anymore. When trying to configure the X environment using SaX2 the following messages will appear in/var/log/Xorg.0.log:
(EE) open /dev/fb0: No such file or directory
(EE) No devices detected.
This affects VNC connections to the virtual machine as well.

Resolution

The config file for the DomU in /etc/xen/vm is missing the following entry:
vfb=['type=vnc,vncunused=1']
Once this has been added restart the virtual machine and use SaX2 in runlevel 3 to reconfigure your X environment using:
sax2 -a
to use /dev/fb0 instead of the previous graphics device.

Additional Information

With SP1 for SLE 10 XEN introduced a virtual framebuffer as graphics device where SLE 10 used a different approach.

Disclaimer

This Support Knowledgebase provides a valuable tool for NetIQ/Novell/SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:3172163
  • Creation Date:15-FEB-08
  • Modified Date:27-APR-12
    • SUSESUSE Linux Enterprise Server

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