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Galaxy nexus tweaks for performance and battery life (work in progress)

M

metalspring

Silver Member
Galaxy nexus all-in-one guide with tweaks for performance and battery life

This is a continuation of my other thread of tweaks and tips and guides I made for the Droid 1 updated for the galaxy nexus
Many of the same tweaks do apply but there are some that don't and some new ones...
I also plan on linking both of the most popular unlocking and rooting tools and as many useful and cool mods I can...

However still being fairly new to the gnex any and all input and suggestions and feedback will be of great help so please post here or pm me

***disclaimer- I am not responsible for any damage you may do to your device, please make sure to have a backup before doing any of these tweaks***
 
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Build.prop tweaks

To use these just mount /system rw, open build.prop in a text editor, add/modify whichever lines you want, save, reboot recovery, wipe cache and dalvik cache, then reboot


Screen/scrolling/gpu/video/photo tweaks


# This defines the max event window manager can
# handle in 1 s. We may adjust this # for performance
# reason later
windowsmgr.max_events_per_sec= (recommended 275)

debug.performance.tuning=1
video.accelerate.hw=1

#Improve screen responsiveness/scrolling
ro.max.fling_velocity=12000
ro.min.fling_velocity=8000

#Improve screen quality at the cost of performance (1 enabled 0 disabled)
persist.sys.use.dithering=1

#Raise Photo and video quality?
ro.media.enc.jpeg.quality=100
ro.media.dec.jpeg.memcap=8000000
ro.media.enc.hprof.vid.bps=8000000
ro.media.enc.hprof.vid.fps=65

#change lcd density (already in build.prop), which is like changing the resolution on a windows computer can be anywhere from 240 to 360 (stock 320)
ro.sf.lcd_density=

Performance/battery tweaks


#disable the zygote loader for performance
ro.wmt.blcr.enable=0

#help to free up unused ram
persist.sys.purgeable_assets=1

#sleep mode for battery savings. 0 power collapse suspend, 1 power collapse (best), 2 apps go to sleep, 3 show clock and wait, 4 wait for interrupt
pm.sleep_mode=

#battery savers
ro.ril.disable.power.collapse=0
#change to 2000 if having issues connecting after signal loss
ro.mot.eri.losalert.delay=1000

#disable sending usage data to google
ro.config.nocheckin=1

Miscellaneous tweaks

#disable camera sound?
persist.sys.camera-sound=0

#stop usb debugging on notification
persist.adb.notify=0

#incoming ringer delay (already in build.prop) sets how soon the phone starts ringing when a call comes in. set between 0 and 3000
ro.telephony.call_ring.delay=

Dalvik vm tweaks

#dalvik cache virtual memory size
dalvik.vm.heapsize= (stock 256m, recommended 320m)
dalvik.vm.heapstartsize= (stock 16m)
dalvik.vm.heapgrowthlimit= (stock 128m)

#disable extended dalvik jni checking
ro.kernel.android.checkjni=0
ro.kernel.checkjni=0
dalvik.vm.checkjni=0

#Use dalvik JIT compiler (Just In Time compiler is much faster and should be enabled by default)
dalvik.vm.execution-mode=int:jit

option 1- disable dalvik checking, increases free ram but less optimized dalvik cache
dalvik.vm.verify-bytecode=false
dalvik.vm.dexopt-flags=v=n,u=n,o=v

option 2 (preferred)- enable more checking for a better performing dalvik cache but may use a little more ram
dalvik.vm.verify-bytecode=true
dalvik.vm.dexopt-flags=v=f,u=n,o=v


Highly experimental tweaks

The following tweaks are currently still in the testing phase (not yet determined to improve performance/battery life/work at all/etc...)
use at your own risk (should not really hurt your phone in any permanent way, should boot just fine, no random freezes reboots, etc)

Enjoy testing and feel free to report back here


#GPU/Video/Scrolling/Media tweaks
persist.sys.ui.hw=1
ro.config.disable.hw_accel=false
debug.composition.type=gpu
ro.min_pointer_dur=8
debug.egl.profiler=1
debug.egl.hw=1
ro.media.dec.vid.wmv.enabled=1
ro.media.dec.aud.wma.enabled=1
ro.media.dec.aud.flac.enabled=1
ro.media.dec.vid.avi.enabled=1
#Remove FPS cap. May be unstable - better have it activated
debug.gr.swapinterval=0

# Enable Stagefright helps stream Video and Music Faster
media.stagefright.enable-player=true
media.stagefright.enable-meta=true
media.stagefright.enable-scan=true
media.stagefright.enable-http=true
media.stagefright.enable-rtsp=true
media.stagefright.enable-record=false

#Disable debugging/error reporting/logging
logcat.live=disable
profiler.force_disable_err_rpt=1
profiler.force_disable_ulog=1

#signal/data tweaks
persist.cust.tel.eons=1
ro.ril.enable.amr.wideband=1
ro.config.hw_fast_dormancy=1
persist.telephony.support.ipv6=1
persist.telephony.support.ipv4=1

# MMS APN retry timer set to 2 sec( if SMS/MMS couldn`t be sent, it retries after 2 instead of 5 seconds)
ro.gsm.2nd_data_retry_config=max/_retries=3, 2000, 2000, 2000

#Battery tweaks
persist.sys.shutdown.mode=hibernate

#Miscellaneous tweaks
debug.enabletr=true
persist.android.strictmode=0\
dalvik.vm.jmiopts=forcecopy

# Disable boot animation for faster boot
debug.sf.nobootanimation=1
#Faster boot.
ro.config.hw_quickpoweron=true

#Better video and picture taking quality
ro.media.capture.maxres=8m
ro.media.panorama.defres=3264x1840
ro.media.panorama.frameres=1280x720
ro.camcorder.videoModes=true
 
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Init.d tweaks

To use mount /system rw, go to /system/etc/init.d create new file with #!/system/bin/sh as the first line, add the lines in, save, and set permissions to rwxr-xr-x


#disable logcat for performance increase
rm dev/log/main


#Flags blocks as non-rotational and increases cache size for performance increase
LOOP=`ls -d /sys/block/loop*`;
RAM=`ls -d /sys/block/ram*`;
MMC=`ls -d /sys/block/mmc*`;
for j in $LOOP $RAM
do
echo "0" > $j/queue/rotational;
echo "2048" > $j/queue/read_ahead_kb;
done


#Disable normalize sleeper for performance
mount -t debugfs none /sys/kernel/debug
echo NO_NORMALIZED_SLEEPER > /sys/kernel/debug/sched_features


#Defrags database files for increased I/O perfomance (requires sqlite3 binary in /system/xbin)
for i in \
`find /data -iname "*.db"`
do \
sqlite3 $i 'VACUUM;';
done


# File System Mounts for I/O performance
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /dev
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /proc
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /sys
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nodev,data=writeback,barrier=0 -t auto /system
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /data
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /data/data
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /cache
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /acct
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /dev/pts
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /dev/cpuctl
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /mnt/asec
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /mnt/obb
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /mnt/sdcard
busybox mount -o remount,noatime,nodiratime,discard,noauto_da_alloc,nosuid,nodev,data=writeback,barrier=0 -t auto /storage/sdcard0


# SD Card Speed Boost
if [ -e /sys/devices/virtual/bdi/179:0/read_ahead_kb ]; then
echo 2048 > /sys/devices/virtual/bdi/179:0/read_ahead_kb
fi


#Disable color-control safety + color presents for Ezekeel color control (not the same as cm9/aokp settings style)
#
echo "0" > /sys/class/misc/colorcontrol/safety_enabled
echo "0 0 0" > /sys/class/misc/colorcontrol/v1_offset
echo "0" > /sys/class/misc/colorcontrol/blue_v1_offset
echo "0" > /sys/class/misc/colorcontrol/green_v1_offset
echo "0" > /sys/class/misc/colorcontrol/red_v1_offset
echo "2004318071 2004318071 2004318071" > /sys/class/misc/colorcontrol/multiplier
echo "0" > /sys/devices/platform/omapdss/manager0/gamma
 
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Mods/other

Suggested color control settings-
whitest whites-
red 200
green 200
blue 265
gamma red -6
gamma green 0
gamma blue 8
omap4 gamma 6 (1.2 via franco app)
Morfic battery saving settings-
Red 135
green 135
blue 200
gamma red 0
gamma green 0
gamma blue 0
omap4 gamma 6 (1.2 via franco app)
Franco suggested settings-
Red 180
Green 192
Blue 200
gamma red -4
gamma green 0
gamma blue 5
omap4 gamma 6 (1.2 via franco app)


Custom auto brightness tweaks (super power save + conservative power save settings)
For both sets of settings-
Light sensor filter enabled yes
Window length 5s
Reset threshold 400 lux
Sample interval 5s
Use custom yes
Screen dim level 1
Allow light decrease yes
Decrease hysteresis 50%

Conservative power save settings-
Edit other levels under screen column-
15
17
19
21
23
25
27
30
32
40
49
54
65
75
100
125
146
179
211
225

Super power save settings-
Edit other levels under screen column-
6
8
9
11
12
14
16
19
23
27
33
40
50
64
85
97
111
146
178
225
 
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Well I know at least one thing I'm trying to work on now should be a very helpful tweak for battery life for those on custom roms that support it- customized auto brightness levels, get the lowest brightness setting possible and still be able to see the screen clearly...any suggestions on this are appreciated...
So far I found the lowest light level to be just about perfect between 4 and 6, it helped me get an awesome 4 hours on screen time WITH overclocking
 
Hi Metalspring,

Thanks for posting your custom brightness levels. I've recently installed AOKP Milestone 5 on my Galaxy Nexus LTE and was looking into trying this feature out. I'll let you know in a few days how I like it.

Thanks,
Biz
 
ok, FINALLY got to update all this (sorry verizon took forever to get 4g here so i can easily check and modify this)
still working on adding in A LOT more stuff but enjoy everything i put up so far
 
Added custom auto brightness tweaks for custom roms with that option to op (should help save a lot of battery, actually can go lower than manual brightness)
 
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