Hi, On 24 March 2015 at 16:07, Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote: > +static int virtio_gpu_crtc_page_flip(struct drm_crtc *crtc, > + struct drm_framebuffer *fb, > + struct drm_pending_vblank_event *event, > + uint32_t flags) > +{ > + return -EINVAL; > +} I'm not going to lie, I was really hoping the 5th (?) GPU option for Qemu would support pageflipping. Daniel's comment about conversion to atomic is relevant, but: do you have a mechanism which allows you to post updates (e.g. 'start displaying this buffer now please') that allows you to get events back when they have actually been displayed? Cheers, Daniel _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization