[Q] usb connectivity - Android Q&A, Help & Troubleshooting

Hi guys.
I was editing the vold.fstab file using root explorer. When i restarted my phone i got a message "Unfortunately Usb connectivity has stopped working." when i open settings i got message "Unfortunately, Settings has stopped working". I still have my original vold.fstab file left in my sd card but sd card is not working too. I have an Xperia M rooted and unlocked bootloader Please help.
Please tell me if there is a way to reset everything and reinstall the firmware.
Thanks.

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Zexter21 said:
Hi guys.
I was editing the vold.fstab file using root explorer. When i restarted my phone i got a message "Unfortunately Usb connectivity has stopped working." when i open settings i got message "Unfortunately, Settings has stopped working". I still have my original vold.fstab file left in my sd card but sd card is not working too. I have an Xperia M rooted and unlocked bootloader Please help.
Please tell me if there is a way to reset everything and reinstall the firmware.
Thanks.
Click to expand...
Click to collapse
You could try to use adb to restore the original vold.fstab to your /system/etc/ folder if your usb debugging is still working:
Code:
adb push vold.fstab /system/etc/vold.fstab
adb shell
su
chmod 755 /system/etc/vold.fstab
exit
adb reboot
If it doesn't work try an other way:
Code:
adb push vold.fstab /data/local/tmp/vold.fstab
adb shell
su
mv /data/local/tmp/vold.fstab /system/etc/vold.fstab
chmod 755 /system/etc/vold.fstab
exit
adb reboot
If any of these ways doesn't work and you have a cwm recovery try to give these commands while you are booted to recovery.
You could also make a flashable zip and you flash it from recovery.
**If you double mounted your sdcard may be corruped and you have to use a partition manager to recreate the partition of your sdcard on PC**

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Thanks for the reply.
Well the usb debugging is still working. So i tried the both adb push command, it says "cannot stat 'vold.fstab': no such file or directory" . EDIT: Tried it again, says "failed to copy vold.fstab to '/system/etc/vold.fstab': Read only file system.
I also tried that chmod command but doesn't works, says "cannot chmod system/etc/vold.fstab: Read only file system.".
And about that cwm, i can't get into cwm recovery. I tried all that vol up and down things. I tried using sd card with a card reader, it works fine. Please help.
Thanks in advance.

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Zexter21 said:
Thanks for the reply.
Well the usb debugging is still working. So i tried the both adb push command, it says "cannot stat 'vold.fstab': no such file or directory" . EDIT: Tried it again, says "failed to copy vold.fstab to '/system/etc/vold.fstab': Read only file system.
I also tried that chmod command but doesn't works, says "cannot chmod system/etc/vold.fstab: Read only file system.".
And about that cwm, i can't get into cwm recovery. I tried all that vol up and down things. I tried using sd card with a card reader, it works fine. Please help.
Thanks in advance.
Click to expand...
Click to collapse
To apply these changes to system partition you have to make your system partition rewritable.Try to make it rw from Root Explorer or try some adb command:
Code:
adb remount
adb shell
su
mount -o remount,rw /system
If this doesn't work try something like:
mount -o remount,rw -t {your partition type} /dev/block/{your partition name and number} /system
* To see your partition table give the command cat proc/mtd or cat /proc/emmc *
Example:
mount -o remount,rw -t ext3 /dev/block/mmcblk0p25 /system
Then try to push the file in the system (Give the "exit" command to quit the shell before try to push the file).

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Gatosbil said:
To apply these changes to system partition you have to make your system partition rewritable.Try to make it rw from Root Explorer or try some adb command:
Code:
adb remount
adb shell
su
mount -o remount,rw /system
If this doesn't work try something like:
mount -o remount,rw -t {your partition type} /dev/block/{your partition name and number} /system
* To see your partition table give the command cat proc/mtd or cat /proc/emmc *
Example:
mount -o remount,rw -t ext3 /dev/block/mmcblk0p25 /system
Then try to push the file in the system (Give the "exit" command to quit the shell before try to push the file).
Click to expand...
Click to collapse
Okay here's what i did.
I pushed the vold.fstab that i backed up before editing. After that i copied the vold.fstab into /system/etc in R/W Mode.
Then i restarted my phone, and finally everything worked fine.
Thanks for the help mate. You've been big help to me. I couldn't have done it without you.

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hello i have a problem similar to this.i edit my vold.fstab file on my emdoor em63 tablet and when i rebooted the sdcard didnt work i was switching the internal to external, I tried to push the file with adb but it says device not found adb works fine for everything else but not for my sdcard i can remount, mount, reboot, but i cant push or pull and on the table when i got to settings/apps or settings/storage force close on me what can i do?