5 files changed, 18 insertions, 0 deletions

diff --git a/ui/console.c b/ui/console.c
index d8cc640c28..c5d11bc701 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -294,6 +294,15 @@ void graphic_hw_gl_block(QemuConsole *con, bool block)
     }
 }
 
+void graphic_hw_gl_flushed(QemuConsole *con)
+{
+    assert(con != NULL);
+
+    if (con->hw_ops->gl_flushed) {
+        con->hw_ops->gl_flushed(con->hw);
+    }
+}
+
 int qemu_console_get_window_id(QemuConsole *con)
 {
     return con->window_id;
diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index 71c3d698b4..588e7b1bb1 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -92,6 +92,9 @@ void gd_egl_draw(VirtualConsole *vc)
         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
     }
+
+    glFlush();
+    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 void gd_egl_update(DisplayChangeListener *dcl,
diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 72bcd94918..e7ca73c7b1 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -70,6 +70,9 @@ void gd_gl_area_draw(VirtualConsole *vc)
         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
     }
+
+    glFlush();
+    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 void gd_gl_area_update(DisplayChangeListener *dcl,
diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c
index 82139ba49e..fd594d7461 100644
--- a/ui/sdl2-gl.c
+++ b/ui/sdl2-gl.c
@@ -58,6 +58,7 @@ static void sdl2_gl_render_surface(struct sdl2_console *scon)
 
     surface_gl_render_texture(scon->gls, scon->surface);
     SDL_GL_SwapWindow(scon->real_window);
+    graphic_hw_gl_flushed(scon->dcl.con);
 }
 
 void sdl2_gl_update(DisplayChangeListener *dcl,
@@ -240,4 +241,5 @@ void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 
     SDL_GL_SwapWindow(scon->real_window);
+    graphic_hw_gl_flushed(dcl->con);
 }
diff --git a/ui/spice-display.c b/ui/spice-display.c
index dccac4710a..6f32b66a6e 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -826,6 +826,7 @@ static void qemu_spice_gl_unblock_bh(void *opaque)
     SimpleSpiceDisplay *ssd = opaque;
 
     qemu_spice_gl_block(ssd, false);
+    graphic_hw_gl_flushed(ssd->dcl.con);
 }
 
 static void qemu_spice_gl_block_timer(void *opaque)