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In some Virtualization environments, a CRTC may not be available but a graphics device may still be present (/dev/dri/card0). In such situations, the modesetting DDX should still load Glamor (and DRI) and work in a "Headless" fashion. Present's screen flip mode will handle the vblanks (and flips) in these situations. Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com> Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
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