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libimobiledevice / idevicerestore

Restore/upgrade firmware of iOS devices
https://libimobiledevice.org
GNU Lesser General Public License v3.0
1.32k stars 391 forks source link

Unable to discover device mode #32

Closed mcjoeng closed 7 years ago

mcjoeng commented 9 years ago

OS：openSUSE 13.2 Device：iPhone5S 8.1.3

mcjoeng@mcj:~/iPhone Software Updates> idevicerestore -e -c iPhone6,2_8.1.3_12B466_Restore.ipsw NOTE: using cached version data ERROR: Unable to discover device mode. Please make sure a device is attached. mcjoeng@mcj:~/iPhone Software Updates>

FunkyM commented 9 years ago

Are you able to run ideviceinfo in the first place?

Poulpoutine commented 8 years ago

I have the same problem, ideviceinfo tells me "No device found, is it plugged in? " but i can see that there is the recovery icon on my iphone 4 which is obviously plugged in.

THOMASCameroun commented 8 years ago

i have the same issue ..... ios 9.2.1 iphone5 cdma

Sn0wDev commented 8 years ago

try running it as root so: sudo idevicerestore your.ipsw it worked for me, after raging for about 15 minutes :P :package:

18chablis commented 8 years ago

Unable to discover device mode. Please make sure a device is attached i am able to run it and i have downloaded every packages for idevicerestore. how can i fix this problem?

SamuelTulach commented 7 years ago

Thanks, Sn0wDev. SUDO worked for me.

rihorn commented 5 years ago

I am still getting the error Unable to discover device mode

I'm using idevicerestore -e 'x.ipsw' under the su root

mounaiban commented 5 years ago

NOTE: This comment is officially out of date, please check my updated comment below...

... I'm just going to repeat what Sn0wDev said in https://github.com/libimobiledevice/idevicerestore/issues/32#issuecomment-216081626 in a more SEO-friendly format for all our lost friends across the internets to find us. I was having this same problem when this trick fixed it for me.

If you are having a problem connecting to your iOS device with idevicerestore, with a message like

ERROR: unable to discover device mode, please make sure a device is attached

try running idevicerestore as root using sudo, with your device connected and in either DFU or Recovery Mode, and with usbmuxd correctly installed on your system:

sudo -l -i 0x00000000BABECAFE

or if you want to erase your device:

sudo -l -e -i 0x00000000BABECAFE

As usual, substitute the -l -e -i with the right options for what you are doing! Just in case distros matter, I am currently running Fedora 29 Workstation.

PROTIP: ECID in dmesg (DFU or Recovery Mode only)

Your device's ECID should show up in an entry in the kernel ring buffer log when you connect it while it is in DFU or Recovery Mode. Type dmesg after connecting your device and check for messages like:

usb-2-2: Product: Apple Mobile Device (DFU Mode)
usb-2-2: Manufacturer: Apple Inc.
usb-2-2: SerialNumber: CPID [omitted...] ECID:00000000BABECAFE [omitted...]

Alternatively just dmesg | grep -n2 ECID

Thanks to devnull for the tip, as seen on this ~2013 article iPhone 3GS – restore or upgrade firmware of iOS devices using Linux on the Sloppy Linux Notes blog: https://sysadm.mielnet.pl/tag/idevicerestore/

nikias commented 5 years ago

@mounaiban I fixed a couple of things in your comment. You should not use -u option when you are using -i ECID, it is always best to just use ECID anyway. Also starting from normal mode is also just fine, maybe you have to run it as root, depending on your setup. However running it as root is only required if libirecovery is not correctly set up via udev. The user running idevicerestore only needs to be member of the group specified in 39-libirecovery.rules and then it shoud work just fine.

nh2 commented 5 years ago

Hey, I came here via Google.

Would it make sense to change the message

ERROR: Unable to discover device mode. Please make sure a device is attached.

into

ERROR: Unable to discover device mode. Please make sure a device is attached and ensure it's in the right mode.

? For in my case I had it plugged in but didn't know I had to put it into the recovery mode (or whatever it's called where in off state, you keep the button pressed and insert the cable) first; I thought it can detect it already when it's simply on.

nh2 commented 5 years ago

BTW, thanks for this software, I just successfully reset an old iPad with it.

I also packaged it for nixpkgs/NixOS, so that it can easily be obtained on any Linux distribution: https://github.com/NixOS/nixpkgs/pull/59427

nikias commented 5 years ago

@nh2 no it doesn't make much sense to change that because it can detect it in all modes. If it fails to detect a device in normal mode then this is usually because usbmuxd isn't properly set up on the system or not running for some reason.

nh2 commented 5 years ago

@nikias Ah I see. Indeed usbmuxd was not running for me, as I just used idevicerestore directly. Is it correct that for that usage, the device needs to be in the recovery mode?

nikias commented 5 years ago

@nh2 well that works obviously. Recovery or DFU mode. Devices in normal mode will be switched to Recovery by idevicerestore.

mounaiban commented 4 months ago

Just an update to my previous comment, incorporating advice from @nikias.

To those coming here from Google (or seeking advice via ChatGPT):

The Unable to discover device mode. Please make sure a device is attached error occurs when idevicerestore is unable to transmit to the device via USB. This is done on Linux (and most other *nix OSes) by writing to USB node files. By default the node files are not writable by a non-superuser.

While running idevicerestore using sudo or as a superuser overcomes this problem, it is safer to add yourself a group authorised to write to the devices' USB node files.

To check which group to add your account to, run cat /lib/udev/rules.d/39-libirecovery.rules, and look in the GROUP= fields. At time of writing, on Fedora 40, the group is disk.

To add your account to the disk group, run: sudo usermod -aG disk $(whoami)

Remember to log out and back in for the membership to take effect.

Now, just run idevicerecovery without sudo, it should just work! :smiley:

Try reconnecting the device if you are still having trouble.

Checking permissions

You can verify that you have write access to node files by first looking up the bus address on lsusb:

...
Bus 001 Device 009: ID 05ac:0069 Apple, Inc. Apple Mobile Device [Recovery Mode]
...

In this case, our device will be in /dev/bus/usb/001/009. Check the write permissions with ls -l /dev/bus/usb/001/009:

crw-rw-r--. 1 root disk 189, 11 May 17 13:05 /dev/bus/usb/001/009

This is correct, as both the superuser root and the group disk has read-write permissions, and can transmit to the USB device represented by this node, while any other non-superuser is not allowed to do so.