[Android Head-Units] kampfschachtel:
just rooted mine on 5.1.1. with SuperSu provided by surfer69 and done a backup with titanum backup. Worked right away as it should.

2 Questions:

1) if I want to update later to Android 6, will it work if I backup "all apps and all system data" and roll that back on the updated Android joying. Or just "all apps"?

2) if I just update to the last 5.1.1 update, which option of titanium backup do I need to run? is it all apps and all system settings?

I also wanted to install the Viper4Joying (on 5.1.1.) update: https://xdaforums.com/showpost.php?p=71317345&postcount=101, just copied the .zip to my USB stick, unzipped it (drive E: )

but I don't get the apk/screen button to start it after rebooting. What did I do wrong?

Done it on my apple air on bootcamp win 8.1 with adb installed. Just downloaded the the .zip to my USB stick, unzipped it (drive E: ). Then CMD.Exe with admin rights and install with IP adress of joying. Same Wifi network for joying and apple notebook.

E:\ViPER4Joying2GB>install 192.168.43.135

E:\ViPER4Joying2GB>adb kill-server

E:\ViPER4Joying2GB>adb connect 192.168.43.135

* daemon not running. starting it now on port 5037 *

* daemon started successfully *

connected to 192.168.43.135:5555

E:\ViPER4Joying2GB>adb root

adbd is already running as root

E:\ViPER4Joying2GB>adb shell "mount -o remount,rw /system"

E:\ViPER4Joying2GB>adb shell "mount -o remount,rw /"

E:\ViPER4Joying2GB>adb shell "mkdir /tmp"

E:\ViPER4Joying2GB>adb shell "mkdir /tmp/viper"

E:\ViPER4Joying2GB>adb push addprop.sh /tmp/viper/

127 KB/s (1173 bytes in 0.008s)

E:\ViPER4Joying2GB>adb push system /tmp/viper/

push: system/etc/audio_effects.conf -> /tmp/viper/etc/audio_effects.conf

push: system/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A4.x-A7.x.ap

k -> /tmp/viper/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A4.x-A7.x

.apk

2 files pushed. 0 files skipped.

256 KB/s (3787102 bytes in 14.393s)

E:\ViPER4Joying2GB>adb shell "chmod 0755 /tmp/viper/addprop.sh"

E:\ViPER4Joying2GB>adb shell "cp /system/build.prop /system/build.prop.viper"

E:\ViPER4Joying2GB>adb shell "cd /tmp/viper/ && sh addprop.sh"

addprop.sh[25]: sed: not found

E:\ViPER4Joying2GB>adb shell "mkdir /system/priv-app/ViPER4Android_FX_v2505"

E:\ViPER4Joying2GB>adb shell "chmod 0755 /system/priv-app/ViPER4Android_FX_v2505

"

E:\ViPER4Joying2GB>adb shell "cp /tmp/viper/system/priv-app/ViPER4Android_FX_v25

05/ViPER4Android_FX_v2505_A4.x-A7.x.apk /system/priv-app/ViPER4Android_FX_v2505"

cp: /tmp/viper/system/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A4.

x-A7.x.apk: No such file or directory

E:\ViPER4Joying2GB>adb shell "chmod 0644 /system/priv-app/ViPER4Android_FX_v2505

/ViPER4Android_FX_v2505_A4.x-A7.x.apk"

Unable to chmod /system/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A

4.x-A7.x.apk: No such file or directory

E:\ViPER4Joying2GB>adb shell "mv /system/etc/audio_effects.conf /system/etc/audi

o_effects.conf.viper"

E:\ViPER4Joying2GB>adb shell "cp /tmp/viper/system/etc/audio_effects.conf /syste

m/etc"

cp: /tmp/viper/system/etc/audio_effects.conf: No such file or directory

E:\ViPER4Joying2GB>adb shell "chmod 0644 /system/etc/audio_effects.conf"

Unable to chmod /system/etc/audio_effects.conf: No such file or directory

E:\ViPER4Joying2GB>adb shell "rm -rf /tmp/viper"

E:\ViPER4Joying2GB>echo Reboot your Head Unit NOW!

Reboot your Head Unit NOW!

E:\ViPER4Joying2GB>install 192.168.43.135

E:\ViPER4Joying2GB>adb kill-server

E:\ViPER4Joying2GB>adb connect 192.168.43.135

* daemon not running. starting it now on port 5037 *

* daemon started successfully *

connected to 192.168.43.135:5555

E:\ViPER4Joying2GB>adb root

adbd is already running as root

E:\ViPER4Joying2GB>adb shell "mount -o remount,rw /system"

E:\ViPER4Joying2GB>adb shell "mount -o remount,rw /"

E:\ViPER4Joying2GB>adb shell "mkdir /tmp"

mkdir failed for /tmp, File exists

E:\ViPER4Joying2GB>adb shell "mkdir /tmp/viper"

E:\ViPER4Joying2GB>adb push addprop.sh /tmp/viper/

143 KB/s (1173 bytes in 0.008s)

E:\ViPER4Joying2GB>adb push system /tmp/viper/

push: system/etc/audio_effects.conf -> /tmp/viper/etc/audio_effects.conf

push: system/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A4.x-A7.x.ap

k -> /tmp/viper/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A4.x-A7.x

.apk

2 files pushed. 0 files skipped.

236 KB/s (3787102 bytes in 15.653s)

E:\ViPER4Joying2GB>adb shell "chmod 0755 /tmp/viper/addprop.sh"

E:\ViPER4Joying2GB>adb shell "cp /system/build.prop /system/build.prop.viper"

E:\ViPER4Joying2GB>adb shell "cd /tmp/viper/ && sh addprop.sh"

addprop.sh[25]: sed: not found

E:\ViPER4Joying2GB>adb shell "mkdir /system/priv-app/ViPER4Android_FX_v2505"

mkdir failed for /system/priv-app/ViPER4Android_FX_v2505, File exists

E:\ViPER4Joying2GB>adb shell "chmod 0755 /system/priv-app/ViPER4Android_FX_v2505

"

E:\ViPER4Joying2GB>adb shell "cp /tmp/viper/system/priv-app/ViPER4Android_FX_v25

05/ViPER4Android_FX_v2505_A4.x-A7.x.apk /system/priv-app/ViPER4Android_FX_v2505"

cp: /tmp/viper/system/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A4.

x-A7.x.apk: No such file or directory

E:\ViPER4Joying2GB>adb shell "chmod 0644 /system/priv-app/ViPER4Android_FX_v2505

/ViPER4Android_FX_v2505_A4.x-A7.x.apk"

Unable to chmod /system/priv-app/ViPER4Android_FX_v2505/ViPER4Android_FX_v2505_A

4.x-A7.x.apk: No such file or directory

E:\ViPER4Joying2GB>adb shell "mv /system/etc/audio_effects.conf /system/etc/audi

o_effects.conf.viper"

mv: rename /system/etc/audio_effects.conf to /system/etc/audio_effects.conf.vipe

r: No such file or directory

E:\ViPER4Joying2GB>adb shell "cp /tmp/viper/system/etc/audio_effects.conf /syste

m/etc"

cp: /tmp/viper/system/etc/audio_effects.conf: No such file or directory

E:\ViPER4Joying2GB>adb shell "chmod 0644 /system/etc/audio_effects.conf"

Unable to chmod /system/etc/audio_effects.conf: No such file or directory

E:\ViPER4Joying2GB>adb shell "rm -rf /tmp/viper"

E:\ViPER4Joying2GB>echo Reboot your Head Unit NOW!

Reboot your Head Unit NOW!

E:\ViPER4Joying2GB>

Obviously it didn't copy the apk...How can I fix it so V4K is runing well.