diff -uprN xorg-server-1.17.2-org/hw/kdrive/ephyr/hostx.c xorg-server-1.17.2/hw/kdrive/ephyr/hostx.c
--- xorg-server-1.17.2-org/hw/kdrive/ephyr/hostx.c	2015-06-17 00:21:07.000000000 +0900
+++ xorg-server-1.17.2/hw/kdrive/ephyr/hostx.c	2018-01-11 18:41:17.836034140 +0900
@@ -809,7 +809,6 @@ hostx_screen_init(KdScreenInfo *screen,
             xcb_shm_detach(HostX.conn, scrpriv->shminfo.shmseg);
             xcb_image_destroy(scrpriv->ximg);
             shmdt(scrpriv->shminfo.shmaddr);
-            shmctl(scrpriv->shminfo.shmid, IPC_RMID, 0);
         }
         else {
             free(scrpriv->ximg->data);
@@ -841,7 +840,6 @@ hostx_screen_init(KdScreenInfo *screen,
                 ("Can't attach SHM Segment, falling back to plain XImages");
             HostX.have_shm = FALSE;
             xcb_image_destroy (scrpriv->ximg);
-            shmctl(scrpriv->shminfo.shmid, IPC_RMID, 0);
         }
         else {
             EPHYR_DBG("SHM segment attached %p", scrpriv->shminfo.shmaddr);
@@ -850,8 +848,10 @@ hostx_screen_init(KdScreenInfo *screen,
                            scrpriv->shminfo.shmseg,
                            scrpriv->shminfo.shmid,
                            FALSE);
+            xcb_aux_sync(HostX.conn);
             shm_success = TRUE;
         }
+        shmctl(scrpriv->shminfo.shmid, IPC_RMID, 0);
     }
 
     if (!ephyr_glamor && !shm_success) {