fix deadlock from rfbReleaseExtensionIterator(), fix no libz/libjpeg builds, disable tightvnc-filetransfer if no libpthread, add --without-pthread option, rm // comments, set NAME_MAX if not defined, x11vnc: throttle load if fb update requests not taking place.

19 files changed, 177 insertions, 35 deletions

diff --git a/ChangeLog b/ChangeLog
index 3ac3af0..bb08857 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2005-11-25  Karl Runge <[email protected]>
+	* configure.ac: disable tightvnc-filetransfer if no libpthread.
+	  add --without-pthread option.
+	* libvncserver/Makefile.am: enable WITH_TIGHTVNC_FILETRANSFER
+	  conditional.
+	* libvncserver/rfbserver.c: fix deadlock from
+	  rfbReleaseExtensionIterator(), fix no libz/libjpeg builds.
+	* libvncserver/{main.c,private.h}, rfb/rfbclient.h, libvncclient/{rfbproto.c,
+	  tight.c,vncviewer.c}: fix no libz/libjpeg builds.
+	* libvncserver/tightvnc-filetransfer/rfbtightserver.c: fix no
+	  libz/libjpeg builds.  rm // comments.
+	* libvncserver/tightvnc-filetransfer/filetransfermsg{.c,.h},
+	  libvncserver/auth.c: rm // comments.
+	* libvncserver/tightvnc-filetransfer/filelistinfo.h: set NAME_MAX if not
+	  defined.
+	* x11vnc: throttle load if fb update requests not taking place.
+
 2005-10-22  Karl Runge <[email protected]>
 	* x11vnc: -filexfer file transfer, -slow_fb, -blackout noptr...
 
diff --git a/configure.ac b/configure.ac
index 7f3ccad..abb338a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,10 +21,8 @@ AH_TEMPLATE(WITH_TIGHTVNC_FILETRANSFER, [Disable TightVNCFileTransfer protocol])
 AC_ARG_WITH(tightvnc-filetransfer,
 	[  --without-filetransfer   disable TightVNC file transfer protocol],
 	, [ with_tightvnc_filetransfer=yes ])
-if test "x$with_tightvnc_filetransfer" = "xyes"; then
-	AC_DEFINE(WITH_TIGHTVNC_FILETRANSFER)
-fi
-AM_CONDITIONAL(WITH_TIGHTVNC_FILETRANSFER, test "$with_tightvnc_filetransfer" = "yes")
+# AC_DEFINE moved to after libpthread check.
+
 AH_TEMPLATE(ALLOW24BPP, [Enable 24 bit per pixel in native framebuffer])
 AC_ARG_WITH(24bpp,
 	[  --without-24bpp         disable 24 bpp framebuffers],
@@ -271,14 +269,27 @@ libz may be obtained from: http://www.gzip.org/zlib/
 	fi
 fi
 
-AC_CHECK_HEADER(pthread.h, HAVE_PTHREAD_H="true")
-if test ! -z "$HAVE_PTHREAD_H"; then
-	# why twice?
-	AC_CHECK_LIB(pthread, pthread_mutex_lock)
-	AC_CHECK_LIB(pthread, pthread_mutex_lock, HAVE_LIBPTHREAD="true")
-fi
+AC_ARG_WITH(pthread,
+[  --without-pthread       disable support for libpthread],,)
 
+if test "x$with_pthread" != "xno"; then
+	AC_CHECK_HEADER(pthread.h, HAVE_PTHREAD_H="true")
+	if test ! -z "$HAVE_PTHREAD_H"; then
+		AC_CHECK_LIB(pthread, pthread_mutex_lock)
+		AC_CHECK_LIB(pthread, pthread_mutex_lock, HAVE_LIBPTHREAD="true")
+	fi
+fi
 AM_CONDITIONAL(HAVE_LIBPTHREAD, test ! -z "$HAVE_LIBPTHREAD")
+
+# tightvnc-filetransfer implemented using threads:
+if test -z "$HAVE_LIBPTHREAD"; then
+	with_tightvnc_filetransfer=""
+fi
+if test "x$with_tightvnc_filetransfer" = "xyes"; then
+	AC_DEFINE(WITH_TIGHTVNC_FILETRANSFER)
+fi
+AM_CONDITIONAL(WITH_TIGHTVNC_FILETRANSFER, test "$with_tightvnc_filetransfer" = "yes")
+
 AM_CONDITIONAL(HAVE_LIBZ, test ! -z "$HAVE_ZLIB_H")
 AM_CONDITIONAL(HAVE_LIBJPEG, test ! -z "$HAVE_JPEGLIB_H")
 
diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
index 1a491a9..7f79c92 100644
--- a/libvncclient/rfbproto.c
+++ b/libvncclient/rfbproto.c
@@ -473,6 +473,7 @@ SetFormatAndEncodings(rfbClient* client)
 	encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingRaw);
       } else if (strncasecmp(encStr,"copyrect",encStrLen) == 0) {
 	encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingCopyRect);
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
       } else if (strncasecmp(encStr,"tight",encStrLen) == 0) {
 	encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingTight);
@@ -482,6 +483,7 @@ SetFormatAndEncodings(rfbClient* client)
 	if (client->appData.enableJPEG)
 	  requestQualityLevel = TRUE;
 #endif
+#endif
       } else if (strncasecmp(encStr,"hextile",encStrLen) == 0) {
 	encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingHextile);
 #ifdef LIBVNCSERVER_HAVE_LIBZ
@@ -547,9 +549,11 @@ SetFormatAndEncodings(rfbClient* client)
     }
 
     encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingCopyRect);
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
     encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingTight);
 #endif
+#endif
     encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingHextile);
 #ifdef LIBVNCSERVER_HAVE_LIBZ
     encs[se->nEncodings++] = rfbClientSwap32IfLE(rfbEncodingZlib);
diff --git a/libvncclient/tight.c b/libvncclient/tight.c
index 48a27e9..f9cc946 100644
--- a/libvncclient/tight.c
+++ b/libvncclient/tight.c
@@ -17,6 +17,7 @@
  *  USA.
  */
 
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
 
 /*
@@ -681,5 +682,7 @@ JpegSetSrcManager(j_decompress_ptr cinfo,
 
 #undef CARDBPP
 
+/* LIBVNCSERVER_HAVE_LIBZ and LIBVNCSERVER_HAVE_LIBJPEG */
+#endif
 #endif
 
diff --git a/libvncclient/vncviewer.c b/libvncclient/vncviewer.c
index 607a2bb..31b4d3d 100644
--- a/libvncclient/vncviewer.c
+++ b/libvncclient/vncviewer.c
@@ -159,10 +159,12 @@ rfbClient* rfbGetClient(int bitsPerSample,int samplesPerPixel,
   client->decompStreamInited = FALSE;
 #endif
 
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
   memset(client->zlibStreamActive,0,sizeof(rfbBool)*4);
   client->jpegSrcManager = NULL;
 #endif
+#endif
 
   client->HandleCursorPos = DummyPoint;
   client->SoftCursorLockArea = DummyRect;
diff --git a/libvncserver/Makefile.am b/libvncserver/Makefile.am
index ecffba1..2a32666 100644
--- a/libvncserver/Makefile.am
+++ b/libvncserver/Makefile.am
@@ -1,6 +1,6 @@
 AM_CFLAGS=-g -Wall
 
-#if WITH_TIGHTVNC_FILETRANSFER
+if WITH_TIGHTVNC_FILETRANSFER
 TIGHTVNCFILETRANSFERHDRS=tightvnc-filetransfer/filelistinfo.h \
 	tightvnc-filetransfer/filetransfermsg.h \
 	tightvnc-filetransfer/handlefiletransferrequest.h \
@@ -10,7 +10,7 @@ TIGHTVNCFILETRANSFERSRCS = tightvnc-filetransfer/rfbtightserver.c \
 	tightvnc-filetransfer/handlefiletransferrequest.c \
 	tightvnc-filetransfer/filetransfermsg.c \
 	tightvnc-filetransfer/filelistinfo.c
-#endif
+endif
 
 includedir=$(prefix)/include/rfb
 #include_HEADERS=rfb.h rfbconfig.h rfbint.h rfbproto.h keysym.h rfbregion.h
diff --git a/libvncserver/auth.c b/libvncserver/auth.c
index 5c1c044..e3a89eb 100755
--- a/libvncserver/auth.c
+++ b/libvncserver/auth.c
@@ -179,7 +179,7 @@ rfbAuthNewClient(rfbClientPtr cl)
     int32_t securityType = rfbSecTypeInvalid;
 
     if (!cl->screen->authPasswdData || cl->reverseConnection) {
-	// chk if this condition is valid or not.
+	/* chk if this condition is valid or not. */
 	securityType = rfbSecTypeNone;
     } else if (cl->screen->authPasswdData) {
  	    securityType = rfbSecTypeVncAuth;
diff --git a/libvncserver/main.c b/libvncserver/main.c
index e6908e1..e0c699f 100644
--- a/libvncserver/main.c
+++ b/libvncserver/main.c
@@ -840,9 +840,11 @@ void rfbScreenCleanup(rfbScreenInfoPtr screen)
   TINI_MUTEX(screen->cursorMutex);
   if(screen->cursor && screen->cursor->cleanup)
     rfbFreeCursor(screen->cursor);
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
   rfbTightCleanup(screen);
 #endif
+#endif
   free(screen);
 }
 
diff --git a/libvncserver/private.h b/libvncserver/private.h
index 594512e..8865e81 100644
--- a/libvncserver/private.h
+++ b/libvncserver/private.h
@@ -13,7 +13,11 @@ rfbClientPtr rfbClientIteratorHead(rfbClientIteratorPtr i);
 
 /* from tight.c */
 
+#ifdef LIBVNCSERVER_HAVE_LIBZ
+#ifdef LIBVNCSERVER_HAVE_LIBJPEG
 extern void rfbTightCleanup(rfbScreenInfoPtr screen);
+#endif
+#endif
 
 /* from zrle.c */
 
diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
index 474351c..75516fe 100644
--- a/libvncserver/rfbserver.c
+++ b/libvncserver/rfbserver.c
@@ -318,6 +318,7 @@ rfbNewTCPOrUDPClient(rfbScreenInfoPtr rfbScreen,
       rfbScreen->clientHead = cl;
       UNLOCK(rfbClientListMutex);
 
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
       cl->tightCompressLevel = TIGHT_DEFAULT_COMPRESSION;
       cl->tightQualityLevel = -1;
@@ -327,6 +328,7 @@ rfbNewTCPOrUDPClient(rfbScreenInfoPtr rfbScreen,
           cl->zsActive[i] = FALSE;
       }
 #endif
+#endif
 
       cl->enableCursorShapeUpdates = FALSE;
       cl->enableCursorPosUpdates = FALSE;
@@ -562,7 +564,7 @@ rfbProcessClientProtocolVersion(rfbClientPtr cl)
         return;
     }
 
-    // Chk for the minor version use either of the two standard version of RFB
+    /* Chk for the minor version use either of the two standard version of RFB */
     cl->protocolMinorVersion = minor_;
     if (minor_ > rfbProtocolMinorVersion) {
        cl->protocolMinorVersion = rfbProtocolMinorVersion;
@@ -949,17 +951,16 @@ rfbProcessClientNormalMessage(rfbClientPtr cl)
 						}
 						encs++;
 					}
-					rfbReleaseExtensionIterator();
-
 
 					if(e)
 						e = e->next;
 				}
+				rfbReleaseExtensionIterator();
 
 				if(!handled)
-					rfbLog("rfbProcessClientNormalMessage: ignoring"
-							" unknown encoding type %d\n",
-							(int)enc);
+					rfbLog("rfbProcessClientNormalMessage: "
+					    "ignoring unknown encoding type %d\n",
+					    (int)enc);
 			}
 		}
             }
@@ -1348,11 +1349,14 @@ rfbSendFramebufferUpdate(rfbClientPtr cl,
     fu->type = rfbFramebufferUpdate;
     if (nUpdateRegionRects != 0xFFFF) {
 	if(cl->screen->maxRectsPerUpdate>0
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
 	   /* Tight encoding counts the rectangles differently */
 	   && cl->preferredEncoding != rfbEncodingTight
+	   /* XXX Should rfbEncodingCoRRE be in here? */
 	   && cl->preferredEncoding != rfbEncodingCoRRE
 #endif
+#endif
 	   && nUpdateRegionRects>cl->screen->maxRectsPerUpdate) {
 	    sraRegion* newUpdateRegion = sraRgnBBox(updateRegion);
 	    sraRgnDestroy(updateRegion);
diff --git a/libvncserver/tightvnc-filetransfer/filelistinfo.h b/libvncserver/tightvnc-filetransfer/filelistinfo.h
index 543edbe..a53964c 100644
--- a/libvncserver/tightvnc-filetransfer/filelistinfo.h
+++ b/libvncserver/tightvnc-filetransfer/filelistinfo.h
@@ -28,6 +28,10 @@
 
 #include <limits.h>
 
+#if !defined(NAME_MAX)
+#define NAME_MAX 255
+#endif
+
 
 #define SUCCESS 1
 #define FAILURE 0
diff --git a/libvncserver/tightvnc-filetransfer/filetransfermsg.c b/libvncserver/tightvnc-filetransfer/filetransfermsg.c
index e7f6476..a51181f 100644
--- a/libvncserver/tightvnc-filetransfer/filetransfermsg.c
+++ b/libvncserver/tightvnc-filetransfer/filetransfermsg.c
@@ -292,7 +292,7 @@ GetFileDownloadLengthErrResponseMsg()
 FileTransferMsg
 GetFileDownloadResponseMsgInBlocks(rfbClientPtr cl, rfbTightClientPtr rtcp)
 {
-	//const unsigned int sz_rfbBlockSize = SZ_RFBBLOCKSIZE;
+	/* const unsigned int sz_rfbBlockSize = SZ_RFBBLOCKSIZE; */
     int numOfBytesRead = 0;
 	char pBuf[SZ_RFBBLOCKSIZE];
 	char* path = rtcp->rcft.rcfd.fName;
diff --git a/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c b/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c
index d9165ef..9def149 100644
--- a/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c
+++ b/libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c
@@ -984,5 +984,3 @@ HandleFileCreateDirRequest(rfbClientPtr cl, rfbTightClientPtr rtcp)
 
 	CreateDirectory(dirName);
 }
-
-
diff --git a/libvncserver/tightvnc-filetransfer/rfbtightserver.c b/libvncserver/tightvnc-filetransfer/rfbtightserver.c
index 9d89de1..933025f 100644
--- a/libvncserver/tightvnc-filetransfer/rfbtightserver.c
+++ b/libvncserver/tightvnc-filetransfer/rfbtightserver.c
@@ -62,7 +62,7 @@ rfbVncAuthSendChallenge(cl)
     rfbClientPtr cl;
 {
 	
-    // 4 byte header is alreay sent. Which is rfbSecTypeVncAuth (same as rfbVncAuth). Just send the challenge.
+    /* 4 byte header is alreay sent. Which is rfbSecTypeVncAuth (same as rfbVncAuth). Just send the challenge. */
     rfbRandomBytes(cl->authChallenge);
     if (rfbWriteExact(cl, (char *)cl->authChallenge, CHALLENGESIZE) < 0) {
         rfbLogPerror("rfbAuthNewClient: write");
@@ -165,7 +165,7 @@ rfbSendAuthCaps(cl)
 	return;
 
     if (cl->screen->authPasswdData && !cl->reverseConnection) {
-	// chk if this condition is valid or not.
+	/* chk if this condition is valid or not. */
 	    SetCapInfo(&caplist[count], rfbAuthVNC, rfbStandardVendor);
 	    rtcp->authCaps[count++] = rfbAuthVNC;
     }
@@ -294,8 +294,10 @@ rfbSendInteractionCaps(cl)
     SetCapInfo(&enc_list[i++],  rfbEncodingRRE,            rfbStandardVendor);
     SetCapInfo(&enc_list[i++],  rfbEncodingCoRRE,          rfbStandardVendor);
     SetCapInfo(&enc_list[i++],  rfbEncodingHextile,        rfbStandardVendor);
+#ifdef LIBVNCSERVER_HAVE_LIBZ
     SetCapInfo(&enc_list[i++],  rfbEncodingZlib,           rfbTridiaVncVendor);
     SetCapInfo(&enc_list[i++],  rfbEncodingTight,          rfbTightVncVendor);
+#endif
     SetCapInfo(&enc_list[i++],  rfbEncodingCompressLevel0, rfbTightVncVendor);
     SetCapInfo(&enc_list[i++],  rfbEncodingQualityLevel0,  rfbTightVncVendor);
     SetCapInfo(&enc_list[i++],  rfbEncodingXCursor,        rfbTightVncVendor);
@@ -404,7 +406,7 @@ const rfbClientToServerMsg* msg;
 
 	/*
 
-	// We shouldn't close the connection here for unhandled msg, it should be left to libvncserver.
+	We shouldn't close the connection here for unhandled msg, it should be left to libvncserver.
 	rfbLog(" ... closing connection\n");
 	rfbCloseClient(cl);
 
@@ -466,7 +468,7 @@ rfbHandleSecTypeTight(rfbClientPtr cl) {
     rfbTightClientPtr rtcp = (rfbTightClientPtr) malloc(sizeof(rfbTightClientRec));
 
     if(rtcp == NULL) {
-        // Error condition close socket
+        /* Error condition close socket */
         rfbLog("Memory error has occured while handling Tight security type... closing connection.\n");
 	 rfbCloseClient(cl);
 	 return;
diff --git a/rfb/rfbclient.h b/rfb/rfbclient.h
index c99f4f9..8759b0e 100644
--- a/rfb/rfbclient.h
+++ b/rfb/rfbclient.h
@@ -157,6 +157,7 @@ typedef struct _rfbClient {
 #endif
 
 
+#ifdef LIBVNCSERVER_HAVE_LIBZ
 #ifdef LIBVNCSERVER_HAVE_LIBJPEG
 	/*
 	 * Variables for the ``tight'' encoding implementation.
@@ -184,6 +185,7 @@ typedef struct _rfbClient {
 	size_t jpegBufferLen;
 
 #endif
+#endif
 
 
 	/* cursor.c */
diff --git a/rfb/rfbproto.h b/rfb/rfbproto.h
index 60ba763..cadbce4 100644
--- a/rfb/rfbproto.h
+++ b/rfb/rfbproto.h
@@ -905,7 +905,7 @@ typedef struct _rfbFileTransferMsg {
     uint8_t contentType;  /*  See defines below */
     uint16_t contentParam;/*  Other possible content classification (Dir or File name, etc..) */
 	uint32_t size;		/*  FileSize or packet index or error or other  */
-	/*  uint32_t sizeH;		// Additional 32Bits params to handle big values. Only for V2 (we want backward compatibility between all V1 versions) */
+	/*  uint32_t sizeH;		 Additional 32Bits params to handle big values. Only for V2 (we want backward compatibility between all V1 versions) */
     uint32_t length;
     /* followed by data char text[length] */
 } rfbFileTransferMsg;
diff --git a/x11vnc/ChangeLog b/x11vnc/ChangeLog
index 752bd0e..1e3180f 100644
--- a/x11vnc/ChangeLog
+++ b/x11vnc/ChangeLog
@@ -1,3 +1,7 @@
+2005-11-25  Karl Runge <[email protected]>
+	* x11vnc: throttle load if fb update requests not taking place.
+	* misc/x11vnc_pw: add utility script
+
 2005-10-22  Karl Runge <[email protected]>
 	* add tightVNC FileTransfer (-filexfer) and -DFILEXFER=1
 	* -slow_fb for special purpose infrequent polling.
diff --git a/x11vnc/misc/x11vnc_pw b/x11vnc/misc/x11vnc_pw
new file mode 100755
index 0000000..04ea1e3
--- /dev/null
+++ b/x11vnc/misc/x11vnc_pw
@@ -0,0 +1,24 @@
+#!/bin/sh
+# usage: x11vnc_pw [file]  (default: ~/.vnc/passwd)
+
+if [ "X$1" = "X" ]; then
+	file=$HOME/.vnc/passwd
+else
+	file=$1
+fi
+
+stty -echo
+printf "Password: "
+read pw1; echo ""
+printf "Verify:   "
+read pw2; echo ""
+stty  echo
+
+if [ "X$pw1" != "X$pw2" ]; then
+	echo "passwords do not match."
+	exit 1
+fi
+
+x11vnc -help > /dev/null 2>&1
+x11vnc -storepasswd "$pw1" "$file"
+ls -l "$file"
diff --git a/x11vnc/x11vnc.c b/x11vnc/x11vnc.c
index 5737a90..2fb2115 100644
--- a/x11vnc/x11vnc.c
+++ b/x11vnc/x11vnc.c
@@ -398,7 +398,7 @@ double xdamage_scheduled_mark = 0.0;
 sraRegionPtr xdamage_scheduled_mark_region = NULL;
 
 /*               date +'lastmod: %Y-%m-%d' */
-char lastmod[] = "0.7.3 lastmod: 2005-10-22";
+char lastmod[] = "0.7.3 lastmod: 2005-11-25";
 int hack_val = 0;
 
 /* X display info */
@@ -520,6 +520,7 @@ unsigned char *tile_has_xdamage_diff, *tile_row_has_xdamage_diff;
 /* times of recent events */
 time_t last_event, last_input = 0, last_client = 0;
 time_t last_keyboard_input = 0, last_pointer_input = 0; 
+time_t last_fb_bytes_sent = 0;
 double last_keyboard_time = 0.0;
 double last_pointer_time = 0.0;
 double last_pointer_click_time = 0.0;
@@ -591,6 +592,7 @@ void blackout_tiles(void);
 void solid_bg(int);
 void check_connect_inputs(void);
 void check_gui_inputs(void);
+void record_last_fb_update(void);
 void check_padded_fb(void);
 void clean_up_exit(int);
 void clear_modifiers(int init);
@@ -1120,6 +1122,7 @@ int got_deferupdate = 0;
 
 int screen_blank = 60;	/* number of seconds of no activity to throttle */
 			/* down the screen polls.  zero to disable. */
+int no_fbu_blank = 30;	/* nap if no client updates in this many secs. */
 int take_naps = 1;	/* -nap/-nonap */
 int naptile = 4;	/* tile change threshold per poll to take a nap */
 int napfac = 4;		/* time = napfac*waitms, cut load with extra waits */
@@ -20431,7 +20434,9 @@ void initialize_screen(int *argc, char **argv, XImage *fb) {
 	screen->setXCutText = xcut_receive;
 
 	if (filexfer) {
+#ifdef LIBVNCSERVER_WITH_TIGHTVNC_FILETRANSFER
 		rfbRegisterTightVNCFileTransferExtension();
+#endif
 	}
 	rfbInitServer(screen);
 
@@ -23504,6 +23509,7 @@ int copy_snap(void) {
  */
 static void nap_set(int tile_cnt) {
 	int nap_in = nap_ok;
+	time_t now = time(0);
 
 	if (scan_count == 0) {
 		/* roll up check for all NSCAN scans */
@@ -23520,14 +23526,23 @@ static void nap_set(int tile_cnt) {
 			nap_ok = 0;
 		}
 	}
+	if (! nap_ok && client_count) {
+		if(now > last_fb_bytes_sent + no_fbu_blank) {
+			if (debug_tiles > 1) {
+				printf("nap_set: nap_ok=1: now: %d last: %d\n",
+				    now, last_fb_bytes_sent);
+			}
+			nap_ok = 1;
+		}
+	}
 
 	if (show_cursor) {
 		/* kludge for the up to 4 tiles the mouse patch could occupy */
 		if ( tile_cnt > 4) {
-			last_event = time(0);
+			last_event = now;
 		}
 	} else if (tile_cnt != 0) {
-		last_event = time(0);
+		last_event = now;
 	}
 }
 
@@ -23563,11 +23578,17 @@ static void nap_check(int tile_cnt) {
 	now = time(0);
 
 	if (screen_blank > 0) {
-		int dt = (int) (now - last_event);
-		int ms = 1500;
+		int dt_ev, dt_fbu, ms = 2000;
 
 		/* if no activity, pause here for a second or so. */
-		if (dt > screen_blank) {
+		dt_ev  = (int) (now - last_event);
+		dt_fbu = (int) (now - last_fb_bytes_sent);
+		if (dt_fbu > screen_blank) {
+			/* sleep longer for no fb requests */
+			nap_sleep(2 * ms, 16);
+			return;
+		}
+		if (dt_ev > screen_blank) {
 			nap_sleep(ms, 8);
 			return;
 		}
@@ -29756,6 +29777,45 @@ void rfbPE(long usec) {
 	}
 }
 
+void record_last_fb_update(void) {
+	static int rbs0 = -1;
+	static time_t last_call = 0;
+	time_t now = time(0);
+	int rbs;
+	rfbClientIteratorPtr iter;
+	rfbClientPtr cl;
+
+	if (last_fb_bytes_sent == 0) {
+		last_fb_bytes_sent = now;
+		last_call = now;
+	}
+
+	if (now <= last_call + 1) {
+		/* check every second or so */
+		return;
+	}
+	last_call = now;
+
+	if (! screen) {
+		return;
+	}
+
+	iter = rfbGetClientIterator(screen);
+	while( (cl = rfbClientIteratorNext(iter)) ) {
+		rbs += cl->rawBytesEquivalent;
+	}
+	rfbReleaseClientIterator(iter);
+
+	if (rbs != rbs0) {
+		rbs0 = rbs;
+		if (debug_tiles > 1) {
+			printf("record_last_fb_update: %d %d\n", now,
+			    last_fb_bytes_sent);
+		}
+		last_fb_bytes_sent = now;
+	}
+}
+
 void rfbCFD(long usec) {
 	if (! screen) {
 		return;
@@ -29987,6 +30047,7 @@ if (debug_scroll) fprintf(stderr, "watch_loop: LOOP-BACK: %d\n", ret);
 			check_keycode_state();
 			check_connect_inputs();		
 			check_gui_inputs();		
+			record_last_fb_update();
 			check_padded_fb();		
 			check_fixscreen();		
 			check_xdamage_state();
@@ -30066,8 +30127,8 @@ if ((debug_tiles || debug_scroll > 1 || debug_wireframe > 1)
     && (tile_diffs > 4 || debug_tiles > 1)) {
 	double rate = (tile_x * tile_y * bpp/8 * tile_diffs) / dt;
 	fprintf(stderr, "============================= TILES: %d  dt: %.4f"
-	    "  t: %.4f  %.2f MB/s\n", tile_diffs, dt, tm - x11vnc_start,
-	    rate/1000000.0);
+	    "  t: %.4f  %.2f MB/s nap_ok: %d\n", tile_diffs, dt,
+	    tm - x11vnc_start, rate/1000000.0, nap_ok);
 }
 
 		}