Guide for fixing bugs while porting custom roms

REQUIREMENTS 

1.Notpad++
2.Boot.img unpacker
3.Win rar or 7zip

INSTRUCTIONS 

MT6582 MOBILE

MT6582 mobile camera not conect:

STEP 1:

copy these from stock ROM to port ROM
system\lib\hw\camera.default.so

Note : .if you have two files like camera.goldfish.so delete this the one with the goldfish

system/lib/ libcamdrv.so
system/lib/libcamalgo.so
system/lib/libcameracustom.so
system/lib/libdpframework.so
system\etc\permissions\android.hardware.camera.xml

STEP 2:

unpcack the boot.img from Port ROM
open init.rc file add/replace below lines

#Camera
#chmod 0660 /dev/FM50AF
chmod 0660 /dev/OV8825AF
chmod 0660 /dev/CAM_CAL_DRV

#chown system camera /dev/FM50AF
chown system camera /dev/OV8825AF
chown system camera /dev/CAM_CAL_DRV
& repack boot.img



MT65XX MOBILE

STEP 1:

Other mediateck Mobile camera not conect :
Copy these from stock ROM to port ROM

system\lib\hw\camera.default.so
Note: if you have two files like camera.goldfish.so delete this the one with the goldfish


system\lib\libcamera_client.so
system\lib\libcameracustom.so
system\lib\libcameraprofile.so
system\lib\libcameraservice.so
system\etc\permissions\android.hardware.camera.xml


STEP 2:

• Unpcack the boot.img from Port ROM

• Open init.rc file add/replace below lines

#Camera
#chmod 0660 /dev/FM50AF
chmod 0660 /dev/OV8825AF
chmod 0660 /dev/CAM_CAL_DRV

#chown system camera /dev/FM50AF
chown system camera /dev/OV8825AF
chown system camera /dev/CAM_CAL_DRV
& repack boot.img


Some Bug Fix All Mediatek Mobile

Camera Force closed or camera not conect :
copy these from stock rom to port Rom

system\lib\hw\camera.default.so
system\lib\libcamera_client.so
system\lib\libcameracustom.so
system\lib\libcameraprofile.so
system\lib\libcameraservice.so
system\lib\libmhal.so
system\lib\libmhalcontent.so
system\lib\libmhaldrv.so
system\lib\libmhalmdp.so
system\lib\libmhalpipe.so
system\lib\libmhalscenario.so
system\lib\libmhalutility.so
system\etc\permission\android.hardware.camera.fron t.xml
system\etc\permission\android.hardware.camera.xml

FOR CAMERA NOT CONNECTED ISSUE /CAMERA GREEN /CAMERA FORCE CLOSE "unfortunately camera has stopped"

Replace first libcamdrv.so (needed for 6582
devices) and check if not success then replace
libcameraservice.so from/lib.

Camera Focus Problem :
system/lib/libcameraservice.so
system/lib/libfeatureio.so from
Note : These step not required for some mobile]

AUDIO NOT COMING IN LOUDSPEAKER MODE
Replace to
system/lib/libaudio.primary.default.so

[If still sound related problem: Replace all libaud*.so Sometimes replacing all audio files give you a boot loop in that case replace only]
system/lib/libaudio.a2dp.default.so
system/lib/libaudio.primary.default.so
system/lib/libaudiocompensationfilter.so
system/lib/libaudiocustparam.so
system/lib/libaudiosetting.so
system/lib/libaudioutils.so
system/lib/libcustom_nvram.so[HIGH AUDIO VOLUME ISSUE]

Note : Some phones not working

SD CARD PROBLEM :
fix internal & external SD Card Problem mount
system/etc/vold.fstab [mount problem Fix]
system/etc/vold.fstab.nand
system/etc/vold [Default problem fix]

Download epo Problem :
Replace in framework folder
mediatek-common.jar
mediatek-framework.jar
mediatek-op.jar
mediatek-telephony-common.jar

3G Problem
Replace to
system/etc/mddb
system/etc/agps_profiles_conf.xml
system/etc/apns-conf.xml
system/etc/epo_conf.xml
system/etc/spn- conf.xml
system/etc/virtual-spn-conf-by-efpnn.xml
system/etc/virtual-spn-conf-by-efspn.xml
system/etc/virtual-spn-conf-by-imsi.xml

WIFI TOGGLE PROBLEM :
system/etc/wide-dhcpv6
system/etc/wifi
system\lib\modules\mtk_stp_wmt.ko
system\lib\modules\mtk_wmt_wifi.ko

COMPASS PROBLEM :
system/lib/libsensorservice.so

VIDEO SHOWING PIXELS AND GLITCHES PROBLEM :
system/lib/libvcodecdrv.so from /lib

FM PROBLEM
system/lib/modul/mtk_fm_drv.k0

GPS Problem:
system/lib/module folder mtk_stp_gps.ko

TOUCH SCREEN PROBLEM :
system/lib/libinput.so


CREDITS : A.S.Noman Khan (xdaforums)