[Xperia Play Android Development] Niko of Death:
Well here's the fixed build.prop I tried, didn't work for me (same ROM)

Also, this doesn't cause any problems, it just doesn't fix anything.

# begin build properties
ro.build.id=JZO54K
ro.build.display.id=CM10 MaXeD
ro.build.version.incremental=eng.root.20130805.103749
ro.build.version.sdk=16
ro.build.version.codename=REL
ro.build.version.release=4.1.2
ro.build.date=Wed Aug 21 10:38:19 CDT 2013
ro.build.date.utc=1375688299
ro.build.type=userdebug
ro.build.user=root
ro.build.host=ubuntu
ro.build.tags=test-keys
ro.product.model=R800x
ro.product.brand=SEMC
ro.product.name=R800x_0000-0000
ro.product.device=R800x
ro.product.board=
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=Sony Ericsson
ro.wifi.channels=
ro.board.platform=msm7x30
# ro.build.product is obsolete; use ro.product.device
ro.build.product=R800x
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=R800x-user 4.0.3 4.1.H.0.4 -z9-3w test-keys
ro.build.fingerprint=SEMC/R800x_0000-0000/R800x:4.0.3/4.1.H.0.4/-z9-3w:user/release-keys
ro.build.characteristics=default
ro.cm.device=zeusc
mod.touchpad.startfrom1=1
ro.semc.product.model=R800x
ro.semc.product.name=Xperia Play
ro.semc.product.device=R800
# end build properties

#
# ADDITIONAL_BUILD_PROPERTIES
#
keyguard.no_require_sim=true
ro.com.android.dateformat=MM-dd-yyyy
ro.carrier=unknown
dalvik.vm.heapstartsize=5m
dalvik.vm.heapgrowthlimit=48m
dalvik.vm.heapsize=128m
ro.opengles.version=131072
rild.libpath=/system/lib/libril-qc-1.so
rild.libargs=-d/dev/smd0
ro.ril.hsxpa=1
ro.ril.gprsclass=10
ro.ril.def.agps.mode=2
ro.ril.def.agps.feature=1
ro.telephony.call_ring.multiple=false
wifi.supplicant_scan_interval=15
ro.com.google.locationfeatures=1
ro.product.locale.language=en
ro.product.locale.region=US
persist.ro.ril.sms_sync_sending=1
ro.use_data_netmgrd=true
ro.tethering.kb_disconnect=1
com.qc.hardware=true
debug.sf.hw=1
debug.composition.type=gpu
hwui.render_dirty_regions=false
hwui.disable_vsync=true
debug.mdpcomp.logs=0
BUILD_UTC_DATE=0
persist.sys.usb.config=mtp
sys.mem.max_hidden_apps=10
debug.camcorder.disablemeta=1
wifi.interface=wlan0
com.qc.hdmi_out=false
ro.sf.lcd_density=240
ro.telephony.ril_class=SemcRILCDMA
ro.telephony.default_network=4
ro.telephony.ril.v3=datacall
ro.cdma.homesystem=64,65,76,77,78,79,80,81,82,83
ro.cdma.home.operator.numeric=310004
ro.cdma.home.operator.alpha=Verizon
ro.cdma.data_retry_config=max_retries=infinite,0,0,60000,120000,480000,900000
persist.telephony.support_ipv6=true
persist.telephony.support_ipv4=true
ro.ril.vzw.feature=1
ro.ril.wp.feature=1
ro.rommanager.developerid=cyanogenmod
ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html
ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html
ro.com.google.clientidbase=android-google
ro.com.android.wifi-watchlist=GoogleGuest
ro.setupwizard.enterprise_mode=1
ro.com.android.dataroaming=false
ro.cm.version=10-20130805-UNOFFICIAL-zeusc
ro.modversion=10-20130805-UNOFFICIAL-zeusc
ro.config.ringtone=ArgoNavis.ogg
ro.config.notification_sound=Antimony.ogg
ro.config.alarm_alert=Barium.ogg
dalvik.vm.lockprof.threshold=500
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt

################################## Additional tweaks by Lordomn

#SONY Media Applications Properties

# Sony Clear Audio+
ro.semc.sound_effects_enabled=true
ro.semc.xloud.supported=true
persist.service.xloud.enable=1
ro.semc.enhance.supported=true
persist.service.enhance.enable=1
ro.semc.clearaudio.supported=true
persist.service.clearaudio.enable=1
ro.somc.clearphase.supported=true
persist.service.clearphase.enable=1

# SONY Audio Resampling
af.resampler.quality=255
persist.af.resampler.quality=255

# System prop to select MPQAudioPlayer by default on mpq8064
mpq.audio.decode=true

# Farenheith's touchpad fix
mod.touchpad.startfrom1=1
debug.inputconsumer.resample=0
debug.velocitytracker.strategy=legacy
debug.inputconsumer.sockbuff=512

# Better scrolling responsiveness & RAM optimization
ro.max.fling_velocity=4000
ro.min.fling_velocity=4000
persist.wifienabled=1
debug.qctwa.statusbar=1
debug.qctwa.preservebuf=1
debug.performance.tuning=1
persist.sys.use_16bpp_alpha=1
persist.sampling_profiler=0
windowsmgr.max_events_per_sec=90
dalvik.vm.verify-bytecode=false
video.accelerate.hw=1
persist.sys.purgeable_assets=1

# Battery
ro.config.hw_fast_dormancy=1
ro.config.hw_power_saving=true
ro.ril.disable.power.collapse=1
pm.sleep_mode=1

# Wireless Speed Tweaks
net.tcp.buffersize.default=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.wifi=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.umts=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.gprs=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.edge=4096,87380,256960,4096,16384,256960
net.ipv4.tcp_ecn=0
net.ipv4.route.flush=1
net.ipv4.tcp_rfc1337=1
net.ipv4.ip_no_pmtu_disc=0
net.ipv4.tcp_sack=1
net.ipv4.tcp_fack=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_rmem=4096 39000 187000
net.ipv4.tcp_wmem=4096 39000 187000
net.ipv4.tcp_mem=187000 187000 187000
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_moderate_rcvbuf=1

# Dialing Tweaks
ro.telephony.call_ring.delay=0
ro.lge.proximity.delay=25
mot.proximity.delay=25

# Media tweaks
ro.media.enc.hprof.file.format=mp4
ro.media.enc.hprof.codec.vid=h264
ro.media.enc.hprof.codec.aud=aac
ro.media.enc.hprof.vid.width=640
ro.media.enc.hprof.vid.height=480
ro.media.enc.hprof.vid.fps=30
ro.media.enc.hprof.vid.bps=4000000
ro.media.enc.hprof.aud.bps=96000
ro.media.enc.hprof.aud.hz=44100
ro.media.enc.hprof.aud.ch=2
ro.media.enc.hprof.duration=0
ro.media.enc.file.format=3gp,mp4
ro.media.enc.vid.codec=m4v,h263,h264
ro.media.enc.aud.codec=aac,amrnb
ro.media.enc.vid.h264.width=176,640
ro.media.enc.vid.h264.height=144,480
ro.media.enc.vid.h264.bps=64000,6000000
ro.media.enc.vid.h264.fps=1,30
ro.media.enc.aud.aac.bps=96000,256000
ro.media.enc.aud.aac.hz=8000,44100
ro.media.enc.aud.aac.ch=2,2
ro.media.cam.preview.fps=0
ro.media.dec.jpeg.memcap=20000000
ro.media.enc.jpeg.quality=90