--- a/ipaq-sleep.c.org	2006-01-20 19:43:14.000000000 +0200
+++ a/ipaq-sleep.c	2007-12-26 06:26:32.000000000 +0200
@@ -27,14 +27,14 @@
 #include <X11/Xlib.h>
 #include <X11/extensions/scrnsaver.h>
 
-#undef DEBUG
+#define DEBUG
 
 int irqs[MAX_IRQS]; /* irqs to examine have a value of 1 */
 long v, irq_count[MAX_IRQS]; /* holds previous counters of the irq's */
 int sleep_idle=3 * 60; /* in seconds */
 int dim_idle=1 * 60; /* in seconds */
 int daemonize=1;
-int sleep_time = DEFAULT_SLEEP_TIME;
+int sleep_time = 1; //DEFAULT_SLEEP_TIME;
 int cpu=1;
 int apm=1;
 int dimming=1;
@@ -57,6 +57,7 @@
 Window root;		    /* The root window (which holds MIT_SCREEN_SAVER
 			       info). */
 XScreenSaverInfo *info;	    /* The MIT_SCREEN_SAVER info object. */
+int xfd = -1;
 
 int init() { 
 	int first_event, first_error;
@@ -69,6 +70,8 @@
 	else {
   		XScreenSaverQueryExtension(dpy, &first_event, &first_error);
   		root = DefaultRootWindow(dpy);
+		XSelectInput(dpy, root, KeyPressMask | KeyReleaseMask | PointerMotionMask);
+		xfd = ConnectionNumber(dpy);
   		info = XScreenSaverAllocInfo();
 #ifdef DEBUG
   		if (debug) 
@@ -108,7 +111,7 @@
       if (fgets (buf, 32, input))
 	{
 	  if (!strncmp (buf, "on ", 3))
-	    r = atoi (buf + 4);
+	    r = atoi (buf + 3);
 	  else
 	    r = -1;
 	}
@@ -189,7 +192,7 @@
 				if (strcmp(func, Lflag)==0) {
 					dim_level=atoi(value);
 #ifdef DEBUG
-					if (debug) fprintf(dgfp, "dim_idle=%d\n", dim_idle);
+					if (debug) fprintf(dgfp, "dim_level=%d\n", dim_idle);
 #endif
 				}
 				if (strcmp(func, aflag)==0) {
@@ -282,6 +285,12 @@
 						dimming=0;
 					}
 				}
+				if (strcmp(func, Lflag)==0) {
+					dim_level=atoi(value);
+#ifdef DEBUG
+					if (debug) fprintf(dgfp, "dim_level=%d\n", dim_idle);
+#endif
+				}
 				if (strcmp(func, aflag)==0) {
 					apm=atoi(value);
 #ifdef DEBUG
@@ -487,8 +496,11 @@
 		return(1);
 	}
 
+	if (info.ac_line_status == AC_LINE_STATUS_UNKNOWN || info.battery_status == BATTERY_STATUS_UNKNOWN)
+		return(0);
+
 #ifdef DEBUG
-	if (debug) fprintf(dgfp,"You are NOT on external power. Its all good.....\n");
+	if (debug) fprintf(dgfp,"You are NOT on external power. Line status: %d, battery status: %d.\n", info.ac_line_status, info.battery_status);
 #endif
 	runtime = info.battery_time;
 	if (apm && runtime >= 0 && runtime < battery_level)
@@ -587,12 +599,17 @@
 	
 }		
 
+/* X idle status checked every sleep_time,
+  other boring and expensive stuff - sleep_time * CYCLE_INTERLEAVE */
+#define CYCLE_INTERLEAVE 10
+
 /* Keep checking the interrupts. As long as there is activity, do nothing. */
 void main_loop (void) {
-	int activity, i, total_unused=0, apm_active=0, old_apm=0;
+	int activity, i, apm_active=0, old_apm=0, last_active = time(NULL);
 	int dimmed=0, current_bl=32;
 	int newIdle, oldIdle, lastIdle, oldTime, newTime;
 	char iline[64];
+	int cycle = 0;
   	
 	Time idleTime; /* milliseconds */
         FILE *f;
@@ -656,6 +673,9 @@
 			if (dimming  && !dimmed && !apm_active) {
 				if ((newIdle-oldIdle)>=dim_idle) {
 					current_bl = read_backlight ();
+#ifdef DEBUG
+					if (debug) fprintf(dgfp, "Dim timeout. Current bl value=%d, setting to=%d\n", current_bl, dim_level);
+#endif
 					set_backlight (dim_level);
 					dimmed=1;
 				}
@@ -664,6 +684,11 @@
 			lastIdle=newIdle;
 	
 		}
+		
+		cycle++;
+		cycle %= CYCLE_INTERLEAVE;
+		if (cycle)
+			goto sleep;
 
 		apm_active=check_apm();
 		if (apm_active) {
@@ -698,17 +723,15 @@
 		}
 
 		if (activity) {
-			total_unused = 0;
+			last_active = time(NULL);
 		}
 		else {
-			total_unused += sleep_time;
-			if (total_unused >= sleep_idle && sleeping) {
+			if (time(NULL) - last_active >= sleep_idle && sleeping) {
 				
 				if (check_cpu() || check_PID() || probe_IRQs()) {
 #ifdef DEBUG
 					if (debug) fprintf(dgfp,"You cannot sleep at this time! Not going to sleep....\n");
 #endif
-					total_unused=0;
 					oldIdle=newIdle;
 				}
 				else {
@@ -718,24 +741,37 @@
 					do_sleep ();
 					set_backlight (current_bl);
 					dimmed=0;					
-					total_unused=0;
+					last_active = time(NULL);
 				}
 			}
 			
 		}
 
+sleep:
 #ifdef DEBUG		
 		if (debug) fflush(dgfp);
 #endif
-		sleep(sleep_time);
+		{
+		struct timeval tv;
+		fd_set readset;
+		FD_ZERO(&readset);
+		if (xfd != -1)
+		    FD_SET(xfd, &readset);
+		tv.tv_sec = 1;
+		tv.tv_usec = 0;
+#ifdef DEBUG		
+		if (debug) fprintf(dgfp, "select=%d, tv_sec=%d, tv_usec=%d\n", select(xfd+1, &readset, NULL, NULL, &tv), tv.tv_sec, tv.tv_usec);
+#endif
+		}
+		
 		
 		newTime=time(NULL);
-		if (oldTime && newTime-sleep_time > oldTime +1) {
+		if (oldTime && newTime-sleep_time > oldTime +2) {
 #ifdef DEBUG
 			if (debug)
-			  fprintf(stderr, "%i sec sleep; resetting timer and resetting dimmer...", (int)(newTime - oldTime));
+			  fprintf(dgfp, "%i sec sleep, apparently, was suspended; resetting timer and resetting dimmer...", (int)(newTime - oldTime));
 #endif
-			total_unused=0;
+			last_active = time(NULL);
 			
 			query_idle(&idleTime);
 			lastIdle=oldIdle=(int)idleTime;