[Android Q&A, Help & Troubleshooting] Chrno219:
Hi,

I tried all root methods on the net but nothing worked.

Now I tried to add the su binary and the other files how it is described on the rockchipfirmware page.

But it didn't work either. Than I changed the boot.img to get write permission on the /system partition.

The permissions are now VERY unsafe, but nothing is working.

Info:

ro.build.description=rk3028a-user 4.4.4 KTU84P user.lucid.20141014.100831 release-keys

ro.com.google.gmsversion=4.4.4_r4

ro.product.version=1.0.3

mount:
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,seclabel,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,seclabel,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,seclabel,relatime 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
none /sys/fs/cgroup tmpfs rw,seclabel,relatime,mode=750,gid=1000 0 0
none /sys/fs/cgroup/memory cgroup rw,relatime,memory 0 0
tmpfs /mnt/secure tmpfs rw,seclabel,relatime,mode=700 0 0
tmpfs /mnt/asec tmpfs rw,seclabel,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,seclabel,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/mtd/by-name/system /system ext4 rw,seclabel,noatime,nodiratime,user_xattr,barrier=1,data=ordered,noauto_da_alloc,discard 0 0
/dev/block/mtd/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,noatime,nodiratime,user_xattr,barrier=1,data=ordered,noauto_da_alloc,discard 0 0
/dev/block/mtd/by-name/metadata /metadata ext4 rw,seclabel,nosuid,nodev,noatime,nodiratime,user_xattr,barrier=1,noauto_da_alloc,discard 0 0
/dev/block/mtd/by-name/userdata /data ext4 rw,seclabel,nosuid,nodev,noatime,nodiratime,user_xattr,barrier=1,data=ordered,noauto_da_alloc,discard 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
/dev/fuse /mnt/shell/emulated fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/block/dm-0 /mnt/asec/com.maxmpz.audioplayer.unlock-1 ext4 ro,dirsync,seclabel,nosuid,nodev,noatime,user_xattr,barrier=1 0 0

/system:
drwxr-xr-x. 16 root root 4096 Jan 1 1970 ./
drwxr-x---+ 4 root root 4096 Mai 24 19:52 ../
drwxrwxrwx. 2 root root 4096 Mai 24 00:58 app/
drwxrwxrwx. 3 root 2000 4096 Mai 24 20:18 bin/
-rw-r--r--. 1 root root 3783 Dez 1 03:46 build.prop
drwxr-xr-x. 10 root root 4096 Dez 1 04:03 etc/
drwxr-xr-x. 2 root root 4096 Sep 30 2014 fonts/
drwxr-xr-x. 3 root root 4096 Sep 30 2014 framework/
drwxr-xr-x. 8 root root 8192 Dez 1 03:41 lib/
drwx------. 2 root root 4096 Jan 1 1970 lost+found/
drwxr-xr-x. 3 root root 4096 Dez 1 04:07 media/
drwxr-xr-x. 2 root root 4096 Okt 14 2014 preinstall/
drwxr-xr-x. 2 root root 4096 Okt 10 2014 priv-app/
drwxr-xr-x. 3 root root 4096 Sep 30 2014 tts/
drwxr-xr-x. 8 root root 4096 Sep 30 2014 usr/
drwxr-xr-x. 5 root 2000 4096 Sep 30 2014 vendor/
drwxrwxrwx. 2 root 2000 4096 Mai 23 23:28 xbin/

/system/bin(shorted)
drwxrwxrwx. 3 root 2000 4096 Mai 24 20:18 ./
drwxr-xr-x. 16 root root 4096 Jan 1 1970 ../
-rwsrwsrwt. 1 root 2000 1062992 Mai 24 20:18 busybox*
-rwsrwsrwt 1 root 2000 83 Mai 24 00:17 remount.sh* (self written script to remount /system in rw mode...did not work)
-rwsrwsrwt 1 root 2000 91980 Mai 24 20:18 su*

/system/xbin
drwxrwxrwx. 2 root 2000 4096 Mai 23 23:28 ./
drwxr-xr-x. 16 root root 4096 Jan 1 1970 ../
-rwsr-sr-x 1 root root 1062992 Mai 23 22:07 busybox*
-rwxr-xr-x 1 root root 104800 Mai 23 23:28 daemonsu*
-rwxr-xr-x. 1 root 2000 59748 Sep 30 2014 dexdump*
-rwxr-xr-x. 1 root 2000 9620 Sep 30 2014 io*
-rwsr-sr-x 1 root root 104800 Mai 23 23:27 su*

Do I have to do something else to get root access?

Thanks

Chrno219