[Android Q&A, Help & Troubleshooting] dihhedessa:
Hi everyone,

I was trying to flash a nightly update from cyanogen and was getting the error : CM 12 Error:detected filesystem ext4 for /dev/block/platform/msm_sdcc.1/by-name/system and so, troubleshooting the problem, I tried to extend the system partitions through the procedure I found in a thread that contained the code down bellow and I believe that was after that that I lost my recoverymode. After this I tried do full wipe and flash an earlier ROM to see if I could get the phone back and that was the last time I was able to enter in the recoverymode. Now I just have a black screen and also when I try to start my phone it took about 2 min on a black screen and then the OS starts. Besides that, all network connectivity was lost (wifi, call signal, 4g/3g) and user space-sdcard (/data partition) too (althoug it seems to be mounted). It appears that was all disabled. Without a recovery mode and internet I am completely stuck. I tried to install a cwm and a twrp through adb after install flash gordon and flashify apk but it did not worked since it cannot recognize a file inside my /data . And the idea I had to restore from rommanager apk failed in the moment it tried to connect on internet to download content.

Please help!! Follow details:

LG_E975

I did a full wipe partition / cache/ dalvik

cyanogemMod version: 11-20141115-SNAPSHOT-M12-E975

android : 4.4.4.

kernel version: 3.4.0-CM+

Code I found and ran when trying to solve CM 12 Error:detected filesystem ext4 for /dev/block/platform/msm_sdcc.1/by-name/system

#!/sbin/sh

OUTFD=$2

ui_print() {
echo -n -e "ui_print $1\n" > /proc/self/fd/$OUTFD
echo -n -e "ui_print\n" > /proc/self/fd/$OUTFD
}

ui_print ""
ui_print "###########################"
ui_print "# audahadi #"
ui_print "# modded from forumber2's #"
ui_print "# Repartition script #"
ui_print "# Mi 3W /system 1.2G #"
ui_print "# only! #"
ui_print "###########################"

ui_print ""
ui_print "Unmounting systems partiton..."

umount -l /system
umount -l /system1
umount -l /dev/block/mmcblk0p25
umount -l /dev/block/mmcblk0p26

ui_print ""
ui_print "WARNING! System is ready, repartitioning will start in 2 seconds"
sleep 2
ui_print ""
ui_print "Removing partitions..."
parted /dev/block/mmcblk0 rm 25
parted /dev/block/mmcblk0 rm 26
ui_print "Removing partitions...COMPLETED"
ui_print ""
ui_print "Creating new partitions..."
parted /dev/block/mmcblk0 mkpart primary 403MB 1740MB
parted /dev/block/mmcblk0 mkpart primary 1740MB 1745MB
parted /dev/block/mmcblk0 name 25 system
parted /dev/block/mmcblk0 name 26 system1
ui_print "Creating new partitions...COMPLETED"
ui_print ""
ui_print "Unmounting systems partitions again..."
umount -l /system
umount -l /system1
umount -l /dev/block/mmcblk0p25
umount -l /dev/block/mmcblk0p26
ui_print "Unmounting systems partitions again...COMPLETED"
ui_print ""
ui_print "Formatting new partitions..."
mke2fs -b 4096 -T ext4 /dev/block/mmcblk0p25
mke2fs -b 4096 -T ext4 /dev/block/mmcblk0p26
ui_print "Formatting new partitions...COMPLETED."
ui_print ""
ui_print "ALL DONE!..."
ui_print ""
ui_print "Rebooting to recovery in 5 seconds..."
ui_print "Thanks to forumber2 for his original GT-i9300 repartition script"
sleep 5
reboot recovery
fi

Output from df command:

shell@e975:/ $ df
df
Filesystem Size Used Free Blksize
/dev 905.8M 128.0K 905.6M 4096
/sys/fs/cgroup 905.8M 12.0K 905.8M 4096
/mnt/asec 905.8M 0.0K 905.8M 4096
/mnt/obb 905.8M 0.0K 905.8M 4096
/mnt/fuse 905.8M 0.0K 905.8M 4096
/system 1.5G 401.3M 1.1G 4096
/cache 788.4M 14.4M 774.0M 4096
/data 25.0G 271.0M 24.8G 4096
shell@e975:/ $

Output from /proc/partitions

shell@e975:/ $ cat /proc/partitions
cat /proc/partitions
major minor #blocks name

179 0 30535680 mmcblk0
179 1 65536 mmcblk0p1
179 2 512 mmcblk0p2
179 3 512 mmcblk0p3
179 4 2048 mmcblk0p4
179 5 512 mmcblk0p5
179 6 512 mmcblk0p6
179 7 24576 mmcblk0p7
179 8 512 mmcblk0p8
179 9 1 mmcblk0p9
179 10 3072 mmcblk0p10
179 11 3072 mmcblk0p11
179 12 780 mmcblk0p12
179 13 780 mmcblk0p13
179 14 780 mmcblk0p14
179 15 8192 mmcblk0p15
179 16 8192 mmcblk0p16
179 17 8 mmcblk0p17
179 18 16384 mmcblk0p18
179 19 16384 mmcblk0p19
179 20 512 mmcblk0p20
179 21 512 mmcblk0p21
179 22 1556480 mmcblk0p22
179 23 819200 mmcblk0p23
179 24 26714112 mmcblk0p24
179 27 24576 mmcblk0p27
179 28 3072 mmcblk0p28
179 29 8 mmcblk0p29
179 30 32768 mmcblk0p30
179 31 32768 mmcblk0p31
259 0 512 mmcblk0p32
259 1 512 mmcblk0p33
259 2 16384 mmcblk0p34
259 3 879599 mmcblk0p35
shell@e975:/ $

Output from /dev/block directory :

shell@e975:/dev/block $ ls -l
ls -l
brw------- root root 7, 0 1970-01-02 12:07 loop0
brw------- root root 7, 1 1970-01-02 12:07 loop1
brw------- root root 7, 2 1970-01-02 12:07 loop2
brw------- root root 7, 3 1970-01-02 12:07 loop3
brw------- root root 7, 4 1970-01-02 12:07 loop4
brw------- root root 7, 5 1970-01-02 12:07 loop5
brw------- root root 7, 6 1970-01-02 12:07 loop6
brw------- root root 7, 7 1970-01-02 12:07 loop7
brw------- root root 179, 0 1970-01-02 12:07 mmcblk0
brw------- root root 179, 1 1970-01-02 12:07 mmcblk0p1
brw------- root root 179, 10 1970-01-02 12:07 mmcblk0p10
brw------- root root 179, 11 1970-01-02 12:07 mmcblk0p11
brw-rw---- system system 179, 12 1970-01-02 12:07 mmcblk0p12
brw-rw---- system system 179, 13 1970-01-02 12:07 mmcblk0p13
brw-rw---- system system 179, 14 1970-01-02 12:07 mmcblk0p14
brw------- root root 179, 15 1970-01-02 12:07 mmcblk0p15
brw------- root root 179, 16 1970-01-02 12:07 mmcblk0p16
brw------- root root 179, 17 1970-01-02 12:07 mmcblk0p17
brw-rw---- root system 179, 18 1970-01-02 12:07 mmcblk0p18
brw------- root root 179, 19 1970-01-02 12:07 mmcblk0p19
brw------- root root 179, 2 1970-01-02 12:07 mmcblk0p2
brw------- root root 179, 20 1970-01-02 12:07 mmcblk0p20
brw------- root root 179, 21 1970-01-02 12:07 mmcblk0p21
brw------- root root 179, 22 1970-01-02 12:07 mmcblk0p22
brw------- root root 179, 23 1970-01-02 12:07 mmcblk0p23
brw------- root root 179, 24 1970-01-02 12:07 mmcblk0p24
brw------- root root 179, 27 1970-01-02 12:07 mmcblk0p27
brw------- root root 179, 28 1970-01-02 12:07 mmcblk0p28
brw------- root root 179, 29 1970-01-02 12:07 mmcblk0p29
brw------- root root 179, 3 1970-01-02 12:07 mmcblk0p3
brw------- root root 179, 30 1970-01-02 12:07 mmcblk0p30
brw------- root root 179, 31 1970-01-02 12:07 mmcblk0p31
brw------- root root 259, 0 1970-01-02 12:07 mmcblk0p32
brw------- root root 259, 1 1970-01-02 12:07 mmcblk0p33
brw------- root root 259, 2 1970-01-02 12:07 mmcblk0p34
brw------- root root 259, 3 1970-01-02 12:07 mmcblk0p35
brw------- root root 179, 4 1970-01-02 12:07 mmcblk0p4
brw------- root root 179, 5 1970-01-02 12:07 mmcblk0p5
brw------- root root 179, 6 1970-01-02 12:07 mmcblk0p6
brw------- root root 179, 7 1970-01-02 12:07 mmcblk0p7
brw-rw---- system system 179, 8 1970-01-02 12:07 mmcblk0p8
brw-rw---- system system 179, 9 1970-01-02 12:07 mmcblk0p9
drwxr-xr-x root root 1970-01-02 12:07 platform
brw------- root root 1, 0 1970-01-02 12:07 ram0
brw------- root root 1, 1 1970-01-02 12:07 ram1
brw------- root root 1, 10 1970-01-02 12:07 ram10
brw------- root root 1, 11 1970-01-02 12:07 ram11
brw------- root root 1, 12 1970-01-02 12:07 ram12
brw------- root root 1, 13 1970-01-02 12:07 ram13
brw------- root root 1, 14 1970-01-02 12:07 ram14
brw------- root root 1, 15 1970-01-02 12:07 ram15
brw------- root root 1, 2 1970-01-02 12:07 ram2
brw------- root root 1, 3 1970-01-02 12:07 ram3
brw------- root root 1, 4 1970-01-02 12:07 ram4
brw------- root root 1, 5 1970-01-02 12:07 ram5
brw------- root root 1, 6 1970-01-02 12:07 ram6
brw------- root root 1, 7 1970-01-02 12:07 ram7
brw------- root root 1, 8 1970-01-02 12:07 ram8
brw------- root root 1, 9 1970-01-02 12:07 ram9
drwx------ root root 1970-01-02 12:09 vold
shell@e975:/dev/block $

Output from cat /proc/mounts :

shell@e975:/dev/block $ cat /proc/mounts
cat /proc/mounts
rootfs / rootfs ro,seclabel,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
debugfs /sys/kernel/debug debugfs 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
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
tmpfs /mnt/fuse tmpfs rw,seclabel,relatime,mode=775,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/platform/msm_sdcc.1/by-name/system /system ext4 ro,seclabel,relatime,
data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/cache /cache ext4 rw,seclabel,nosuid,node
v,noatime,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/userdata /data ext4 rw,seclabel,nosuid,no
dev,noatime,noauto_da_alloc,data=ordered 0 0
shell@e975:/dev/block $