diff -urN tvheadend-4.2.2.old/src/input/mpegts/linuxdvb/linuxdvb_ca.c tvheadend-4.2.2/src/input/mpegts/linuxdvb/linuxdvb_ca.c
--- tvheadend-4.2.2.old/src/input/mpegts/linuxdvb/linuxdvb_ca.c	2017-05-16 11:15:24.000000000 +0000
+++ tvheadend-4.2.2/src/input/mpegts/linuxdvb/linuxdvb_ca.c	2017-06-09 22:39:44.856427300 +0000
@@ -37,6 +37,9 @@
 #include "descrambler/caid.h"
 #include "descrambler/dvbcam.h"
 
+/* Seconds to wait for a slot to become ready */
+#define MAX_SLOT_READY_WAIT_SECS 10
+
 typedef enum {
   CA_SLOT_STATE_EMPTY = 0,
   CA_SLOT_STATE_MODULE_PRESENT,
@@ -666,6 +669,8 @@
 {
   linuxdvb_ca_t *lca = aux;
   int slot_id, lasterror = 0;
+  int i;
+  ca_slot_info_t csi;
 
   lca->lca_tl = en50221_tl_create(5, 32);
   if (!lca->lca_tl) {
@@ -673,6 +678,39 @@
     return NULL;
   }
 
+  /* Fix - Step 1: Issue a reset of the slot */
+  if (ioctl(lca->lca_ca_fd, CA_RESET, (1 << lca->lca_number))) {
+    tvherror(LS_EN50221, "unable to reset ca%u %s", 
+             lca->lca_number, lca->lca_ca_path);
+    return NULL;
+  }
+
+  /* Fix - Step 2: Poll the slot until it becomes ready */
+  csi.num = lca->lca_number;
+  for (i=0; i <= (MAX_SLOT_READY_WAIT_SECS * 1000); i++) {
+    /* sleep 1ms */
+    tvh_safe_usleep(1000);
+    /* get slot information */
+    if(ioctl(lca->lca_ca_fd, CA_GET_SLOT_INFO, &csi)) {
+      tvherror(LS_EN50221, "unable to get slot info for CAM #%d, path: %s",
+               lca->lca_number, lca->lca_ca_path);
+      return NULL;
+    }
+    /* check for slot being ready */
+    if(csi.flags & CA_CI_MODULE_READY) {
+      tvhtrace(LS_EN50221, "slot ready on CAM #%d after ~%d msecs, path: %s",
+              lca->lca_number, i, lca->lca_ca_path);
+      break;
+    }
+  }
+
+  /* Fix - Step 3: If the slot fails to initialise, give up */
+  if(i >= (MAX_SLOT_READY_WAIT_SECS * 1000)) {
+    tvherror(LS_EN50221, "timeout after ~%d msecs to get slot info for CAM #%d, path: %s", 
+             i, lca->lca_number, lca->lca_ca_path);
+    return NULL;
+  }
+
   slot_id = en50221_tl_register_slot(lca->lca_tl, lca->lca_ca_fd, 0, 1000, 100);
   if (slot_id < 0) {
     tvherror(LS_EN50221, "slot registration failed");
@@ -766,6 +804,7 @@
                 csi.num, lca->lca_state_str);
       idnode_notify_title_changed(&lca->lca_id, NULL);
       lca->lca_state = state;
+      lca->lca_state_wait = 0;
     }
 
     if ((!lca->lca_en50221_thread_running) &&
@@ -774,6 +813,12 @@
       lca->lca_en50221_thread_running = 1;
       tvhthread_create(&lca->lca_en50221_thread, NULL,
                        linuxdvb_ca_en50221_thread, lca, "lnxdvb-ca");
+    } else if (lca->lca_en50221_thread_running && 
+	       (state == CA_SLOT_STATE_MODULE_PRESENT) &&
+               lca->lca_state_wait < (MAX_SLOT_READY_WAIT_SECS * 4))
+    {
+      /* wait for the slot to move from PRESENT to READY */
+      lca->lca_state_wait++;
     } else if (lca->lca_en50221_thread_running &&
                (state != CA_SLOT_STATE_MODULE_READY))
     {
diff -urN tvheadend-4.2.2.old/src/input/mpegts/linuxdvb/linuxdvb_private.h tvheadend-4.2.2/src/input/mpegts/linuxdvb/linuxdvb_private.h
--- tvheadend-4.2.2.old/src/input/mpegts/linuxdvb/linuxdvb_private.h	2017-05-16 11:15:24.000000000 +0000
+++ tvheadend-4.2.2/src/input/mpegts/linuxdvb/linuxdvb_private.h	2017-06-04 13:40:15.663449402 +0000
@@ -211,6 +211,7 @@
   char                     *lca_ca_path;
   int                      lca_state;
   const char               *lca_state_str;
+  int                      lca_state_wait;
   linuxdvb_ca_capmt_queue_t lca_capmt_queue;
   /*
    * CAM module info