[AT&T Samsung Galaxy S II SGH-I777] Bethrezen1453:
Thanks for the scripts!

I've also found an interesting script at 9100 Siyah Kernel topic ( http://xdaforums.com/showthread.php?t=1263838&page=1813 )

I got sleep of death by using below script so you may want to check voltages setting before using it.

#!/system/bin/sh

# ******************
# 1°) I/O Schedulers
# ******************

# Set i/o scheduler (Valid values are: noop, deadline, cfq, bfq, sio, vr, anticipatory)
echo bfq > /sys/block/mmcblk0/queue/scheduler;

# ************************************************
# 2°) Scaling Governor & Smooth Scaling Parameters
# ************************************************

# Set scaling governor, according to available governors in your kernel
echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor;

# Smooth scaling parameters to control any governor jumping to higher frequency directly.
echo 2 > /sys/devices/system/cpu/cpu0/cpufreq/smooth_target;
echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/smooth_offset;
echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/smooth_step;

# ****************************************************************
# 3°) Deepsleep Levels
# cpulevel = 4 (100Mhz - 800Mhz, default), 5 (100Mhz - 500Mhz)
# buslevel = 0 (400MHz, default), 1 (266MHz), 2 (133MHz)
# ****************************************************************

# Set deep sleep frequency & bus speed:
echo 5 > /sys/devices/system/cpu/cpu0/cpufreq/deepsleep_cpulevel;
echo 2 > /sys/devices/system/cpu/cpu0/cpufreq/deepsleep_buslevel;

# ****************************
# 4°) CPU Frequency & Voltages
# ****************************

# Set frequency steps according to the number of steps in your kernel.
echo "1600 1400 1200 1000 800 500 200 100" > /sys/devices/system/cpu/cpu0/cpufreq/freq_table;

# Set voltages for frequency steps. Changes possible at +/-25mV steps
echo "1350 1275 1150 1050 950 900 850 800" > /sys/devices/system/cpu/cpu0/cpufreq/UV_mV_table;

# Sets global scaling min&max frequencies as 100 and 1000 mhz
echo 100000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq;
echo 1200000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq;

# ************************************
# 5°) GPU Clock, Voltages & Thresholds
# ************************************

# Set GPU clocks (Valid values are: 100 114 133 160 200 267 300 400 )
echo "40 133 267" > /sys/class/misc/gpu_clock_control/gpu_control;

# Set GPU Up and Down thresholds
echo "90% 25% 90% 45%" > /sys/class/misc/gpu_clock_control/gpu_control;

# Set GPU voltages (Changes possible at +/-50mV ie at 50000 steps)
echo "850000 900000 950000" > /sys/class/misc/gpu_voltage_control/gpu_control;

# ======================================================
# 6°) Hot Plug Thresholds, Sampling Interval & Frequency
# ======================================================

# Set second core kick-in threshold for screen-on state
echo 35 > /sys/module/pm_hotplug/parameters/loadl;
echo 80 > /sys/module/pm_hotplug/parameters/loadh;

# Set second core kick-in threshold for screen-off state
echo 90 > /sys/module/pm_hotplug/parameters/loadl_scroff;
echo 100 > /sys/module/pm_hotplug/parameters/loadh_scroff;

# Set hot plug sampling intervals for screen-on state
echo 400 > /sys/module/pm_hotplug/parameters/rate;
echo 400 > /sys/module/pm_hotplug/parameters/rate_cpuon;

# Set hot plug sampling intervals for screen-off state
echo 1000 > /sys/module/pm_hotplug/parameters/rate_scroff;

# Set frequency below which second core will not be turned on, regardless of thresholds.
echo 524288 > /sys/module/pm_hotplug/parameters/freq_cpu1on;

# ===================
# 7°) Bus Frequencies
# ===================

# Set bus frequencies for highest-to-lowest cpu frequencies and enable static bus frequency scaling
#echo "0 0 0 1 1 2 2 2" > /sys/devices/system/cpu/cpu0/cpufreq/busfreq_static;
#echo enabled > /sys/devices/system/cpu/cpu0/cpufreq/busfreq_static;

# ====================================
# 8°) Schedule Multi Core & Idle Modes
# ====================================

# Enable sched_mc
echo 1 > /sys/devices/system/cpu/sched_mc_power_savings;

# Enable AFTR
echo 3 > /sys/module/cpuidle/parameters/enable_mask;

# =============================
# 9°) Brightness Curve Settings
# =============================

# Brightness settings (Possible values for min_bl = 0 to 255 | min_gamma = 0 to 24 | max_gamma = 0 to 24)
echo 20 > /sys/class/misc/brightness_curve/min_bl;
echo 1 > /sys/class/misc/brightness_curve/min_gamma;
echo 24 > /sys/class/misc/brightness_curve/max_gamma;

# =================================
# 10°) Touch Sensitivity Parameters
# =================================

# Set touch sensitivity (Possible values are between 40 to 80. Lower value = higher sensitivity)
echo 40 > /sys/devices/virtual/sec/sec_touchscreen/tsp_threshold;

# ===================
# 11°) Charge Current
# ===================

# Set AC, Misc & USB charge current (Do not set Ac & Misc more than 1000mA or Usb more than 450)
echo "950 950 450" > /sys/devices/virtual/misc/charge_current/charge_current;

# =======================================
# 12°) Switch Hotplug/DualCore/SingleCore
# =======================================

# Set Dynamic hotplug mode
echo on > /sys/devices/virtual/misc/second_core/hotplug_on;
echo on > /sys/devices/virtual/misc/second_core/second_core_on;

# ===================
# 13°) Disable logger
# ===================

if [ ! -d /data/.siyah ];
then
mkdir /data/.siyah;
chmod 777 /data/.siyah;
fi;
touch /data/.siyah/disable-logger;

# ====================
# 14°) Graphic tunings
# ====================

setprop debug.sf.hw 1; # HARDWARE RENDERING (GPU)
setprop video.accelerate.hw 1;
setprop debug.performance.tuning 1;