Index: firmware/target/arm/system-target.h
===================================================================
--- firmware/target/arm/system-target.h	(revision 17347)
+++ firmware/target/arm/system-target.h	(working copy)
@@ -29,13 +29,13 @@
 #if CONFIG_CPU == PP5002
 #define CPUFREQ_SLEEP      32768
 #define CPUFREQ_DEFAULT 24000000
-#define CPUFREQ_NORMAL  30000000
+#define CPUFREQ_NORMAL  24000000
 #define CPUFREQ_MAX     80000000
 
 #else /* PP5022, PP5024 */
 #define CPUFREQ_SLEEP      32768
 #define CPUFREQ_DEFAULT 24000000
-#define CPUFREQ_NORMAL  30000000
+#define CPUFREQ_NORMAL  24000000
 #define CPUFREQ_MAX     80000000
 #endif
 
Index: firmware/target/arm/system-pp502x.c
===================================================================
--- firmware/target/arm/system-pp502x.c	(revision 17347)
+++ firmware/target/arm/system-pp502x.c	(working copy)
@@ -214,14 +214,16 @@
         udelay(500);                /* wait for relock */
 #elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
         PLL_CONTROL   = 0x8a121403; /*  80 MHz = (20/3 * 24MHz) / 2 */
+        //PLL_CONTROL   = 0x8a121e04; /*  90 MHz = (30/4 * 24MHz) / 2 */
         while (!(PLL_STATUS & 0x80000000)); /* wait for relock */
 #endif
         scale_suspend_core(true);
         DEV_TIMING1   = 0x00000808;
+        //DEV_TIMING1   = 0x00000909;
         CLOCK_SOURCE  = 0x20007777; /* source #1, #2, #3, #4: PLL (#2 active) */
         scale_suspend_core(false);
         break;
-#if 0 /******** CPUFREQ_NORMAL = 24MHz without PLL ********/
+#if 1 /******** CPUFREQ_NORMAL = 24MHz without PLL ********/
       case CPUFREQ_NORMAL:
         cpu_frequency =  CPUFREQ_NORMAL;
         PLL_CONTROL  |=  0x08000000;
Index: firmware/drivers/button.c
===================================================================
--- firmware/drivers/button.c	(revision 17347)
+++ firmware/drivers/button.c	(working copy)
@@ -93,6 +93,24 @@
 }
 #endif
 
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+static void gui_boost(bool state)
+{
+    static bool boosted = false;
+    
+    if (state && !boosted)
+    {
+        cpu_boost(true);
+        boosted = true;
+    }
+    else if (!state && boosted)
+    {
+        cpu_boost(false);
+        boosted = false;
+    }
+}
+#endif /* HAVE_ADJUSTABLE_CPU_FREQ */
+
 static void button_tick(void)
 {
     static int count = 0;
@@ -106,6 +124,10 @@
     static bool skip_remote_release = false;
 #endif
 #endif
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+    static unsigned long last_button_usec;
+    unsigned long usec = USEC_TIMER;
+#endif
     int diff;
     int btn;
 #ifdef HAVE_BUTTON_DATA
@@ -139,6 +161,19 @@
     }
 #endif
 
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+    /* Boost gui on button activity, unboost gui after timeout. */
+    if (BUTTON_NONE != btn)
+    {
+        last_button_usec = usec;
+        gui_boost(true);
+    }
+    else if (TIME_AFTER(usec, last_button_usec + 1000000))
+    {
+        gui_boost(false);
+    }
+#endif
+
     /* Find out if a key has been released */
     diff = btn ^ lastbtn;
     if(diff && (btn & diff) == 0)