Re: [libvirt] [PATCH] qemu: detect multi-head qxl via more than version check

On Wed, Mar 13, 2013 at 18:48:46 -0600, Eric Blake wrote:

Multi-head QXL support is so useful that distros have started to backport it to qemu earlier than 1.2. After discussion with Alon Levy, we determined that the existence of the qxl-vga.surfaces property is a reliable indicator of whether '-device qxl-vga' works, or whether we have to stick to the older '-vga qxl'. I'm leaving in the existing check for QEMU_CAPS_DEVICE_VIDEO_PRIMARY tied to qemu 1.2 and newer (in case qemu is built without qxl support),

So in other words, QEMU_CAPS_DEVICE_VIDEO_PRIMARY will be set iff qemu version is 1.2 or newer or qxl-vga.surfaces exists. That seems fine. ACK Jirka