--- /home/alexey/vbox-orig/VirtualBox-5.0.0_BETA4/./src/VBox/HostServices/SharedOpenGL/render/renderspu_glx.c 2015-05-18 18:02:05.000000000 +0300 +++ ./src/VBox/HostServices/SharedOpenGL/render/renderspu_glx.c 2015-05-22 23:33:33.000000000 +0300 @@ -1922,11 +1922,10 @@ XSync(window->visual->dpy, 0); } } } -#define CR_RENDER_FORCE_PRESENT_MAIN_THREAD void renderspu_SystemVBoxPresentComposition( WindowInfo *window, const struct VBOXVR_SCR_COMPOSITOR_ENTRY *pChangedEntry ) { /* the CR_RENDER_FORCE_PRESENT_MAIN_THREAD is actually inherited from cocoa backend impl, * here it forces rendering in WinCmd thread rather than a Main thread.