I rooted with TWRP 3.2.1-0, installed SuperSU zip (later automatically updated) and added Busybox. I presently have three backups plus one of the EFS directory alone. The older one is some three weeks old. Since then I fight with this problem. Probably, I have done something wrong, but I canxe2x80x99t figure out what.
The problem is that I donxe2x80x99t really have root access, even if any type of root checker says that I do. Files on ES Explorer read rw each time I restore any of those backups, as I can see, but a couple of minutes later the CHMOD strangely changes by itself to what it is when a phone is not rooted, and writing permissions are gone. Chang CHMOD with a file manager has the same result, but showing dwrx. If I reboot I have drw everywhere, but no effect on root access as in any case, and in less than 2 minutes all root directories revert to their original permissions, except the /system directory, maintaining now drwxrwxr-x. This is very confusing and difficult to describe, but something is sure: the permissions change by themselves and I never have root access. However I had it before the first TWRP backup because I could install an application on /system. I know little about adb commands, but I have used those that I found on other threads on this forum and elsewhere, and get some answers like adbd cannot run as root in production builds for adb root. I also tried the following command on both the TWRP terminal and a terminal emulator app, also both under u0227@jflte:/ and after entering SU: mount -o rw,remount /system
Result under u0227@jflte:/ Mount: Permission denied
after entering SU here tmp-mksh: Mount: not found
Command /system/bin/mount -o remount,rw /system /system
Result: Permission denied
More commands that I ran on adb on computer
adb devices
Result: List of devices attached * daemon not running. starting it now on port 5037 * * daemon started successfully * 4daf65fc device
adb shell
Result: shell@jflte:/ $ su 1|shell@jflte:/ $ # 1|shell@jflte:/ $ adb root * daemon not running. starting it now on port 5038 * * daemon started successfully * error: device not found
mount -o remount,rw /system
Result: mount: Permission denied
mount -o remount,rw -t ext4 /dev/block/actc /system
Result: mount: Permission denied
There are others that I tried, but this post is already so long... Still, when I try to install any app with System Apps Installer or other as root, as I could before, I invariably get the same answer: Mounting error, Cannot mount system partition as Read/Write.
I found a few advices to use the command cat /proc/mounts to find problems. I did, but I post a copy of the very long result after this text because I canxe2x80x99t find anything by myself. Perhaps it will help someone to help me.
The same happens now with the other slightly older backups that I restored, but at the beginning I even installed an application in the /system. Why has this changed? Could it have been from the latest updated SuperSU version, because I read on XDA Developers it has issues and recommend changing to an older version? I searched a lot and found many threads about this permissions problems but none changing like mine, and none solved. I wonder what the cause can be and. Why so many threads about the root permissions issue and not a single one solved? Thank anyone for any welcome help. Sorry for being so long, but I really want to repair this issue and with so many threads about it I couldn't find just one solution.
Result from command cat /proc/mounts
root@jflte:/ # cat /proc/mounts 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 none /dev/cpuctl cgroup rw,relatime,cpu 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 debugfs /sys/kernel/debug debugfs rw,relatime 0 0 none /sys/fs/cgroup tmpfs rw,seclabel,relatime,mode=750,gid=1000 0 0 none /acct cgroup rw,relatime,cpuacct 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 /dev/block/platform/msm_sdcc.1/by-name/apnhlos /firmware vfat ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,gid=1000,fmask=0337,dmask=0227,codepage=cp437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0 /dev/block/platform/msm_sdcc.1/by-name/mdm /firmware-mdm vfat ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,gid=1000,fmask=0337,dmask=0227,codepage=cp437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0 /dev/block/platform/msm_sdcc.1/by-name/system /system ext4 ro,seclabel,relatime,errors=panic,data=ordered 0 0 /dev/block/platform/msm_sdcc.1/by-name/userdata /data ext4 rw,seclabel,nosuid,nodev,noatime,discard,journal_checksum,journal_async_commit,noauto_da_alloc,data=ordered 0 0 /dev/block/platform/msm_sdcc.1/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,noatime,discard,journal_checksum,journal_async_commit,noauto_da_alloc,errors=panic,data=ordered 0 0 /dev/block/platform/msm_sdcc.1/by-name/efs /efs ext4 rw,seclabel,nosuid,nodev,noatime,discard,journal_checksum,journal_async_commit,noauto_da_alloc,errors=panic,data=ordered 0 0 /dev/block/platform/msm_sdcc.1/by-name/hidden /preload ext4 ro,seclabel,nosuid,nodev,relatime,data=ordered 0 0 /dev/block/platform/msm_sdcc.1/by-name/persdata /persdata/absolute ext4 rw,seclabel,nosuid,nodev,relatime,data=ordered 0 0 /data/media /mnt/shell/emulated sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=legacy,reserved=20MB 0 0 /data/privatemode /mnt/shell/privatemode sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1000,gid=1000,derive=none 0 0 /data/knox/sdcard /mnt/shell/knox-emulated sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1000,gid=1000,derive=none 0 0 tmpfs /storage/emulated tmpfs rw,seclabel,nosuid,nodev,relatime,mode=751,gid=1028 0 0 /dev/block/vold/179:33 /mnt/media_rw/extSdCard vfat rw,dirsync,seclabel,nosuid,nodev,noexec,noatime,nodiratime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0 /mnt/media_rw/extSdCard /storage/extSdCard sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=unified 0 0 /data/media /storage/emulated/0 sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=legacy,reserved=20MB 0 0 /data/media /storage/emulated/legacy sdcardfs rw,seclabel,nosuid,nodev,relatime,uid=1023,gid=1023,derive=legacy,reserved=20MB 0 0 root@jflte:/ #
