On Fri, Oct 03, 2008 at 11:26:55AM -0400, Cole Robinson wrote:
Daniel P. Berrange wrote:
QEMU has two modes of providing a graphical display, VNC and SDL. Now most of our tools just use VNC, but occasionally people want to use SDL for some crazy reason. We already support this in Xen driver, but the QEMU impl has been rather lacking. At the moment if you ask for a SDL display it'll only happen to work if you had the $DISPLAY environment variable set when you started libvirtd - you probably don't.
I've thought about this issue before, not sure how to fully solve it though. If we set the display in the xml at install time (say setting it to :0.0), but at a later time we ssh =Y into that machine, the display in the xml will be wrong, and possibly pop the sdl window on someone else's display. Possibly a solution at the virsh or virt-manager level?
There's frankly no practical way to solve the general case problem. This only attempts to solve one specific use case. A server running the guest has a permanent X11 display available, and the admin wants to configure a guest to use this display, regardless of what $DISPLAY libvirtd/virsh happen to have. This patch enables this use case by allowing the XML to contain the explicit display name & xauth file for the server the admin wants to use. I don't expect this to be useful in the context of virt-manager. VNC is the only sensible general purpose config - SDL should only be considered for specific use cases. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|