[error -6] on Ubuntu 16.04

[botcs]

Worked well on 14.04 but after upgrading:
ipad_charge: unable to claim interface: error -6
ipad_charge: Resource busy
ipad_charge: error setting charge mode
ipad_charge: no such device or an error occured

I have iPad mini 1

[jameslovallo]

I get the same error on mine with an iPad Air 2. Have you found a workaround?

[botcs]

not yet :\

[nitsanw]

Had the same issue, after some digging around came up with following solution:

       // hacked into set_charging_mode, replace the claim_interface block with this
       // Resource Busy issue is caused because kernel is attached to device, so enable auto detach
        if ((ret = libusb_set_auto_detach_kernel_driver(dev_handle, 1)) < 0) {
                fprintf(stderr, "ipad_charge: set auto detach failed: error %d\n", ret);
                fprintf(stderr, "ipad_charge: %s\n", libusb_strerror(ret));
                return ret;
        }

        // Original code assumes the bInterfaceNumber is always 0, for me it turned out to be 2.
        // You can use lsusb to find out which interface numbers are available
        if ((ret = libusb_claim_interface(dev_handle, 2)) < 0) {
                fprintf(stderr, "ipad_charge: unable to claim interface: error %d\n", ret);
                fprintf(stderr, "ipad_charge: %s\n", libusb_strerror(ret));
                goto out_close;
        }

I am running Ubuntu 16.04 on an MBP 11,1 and charging and iPad4. Seems to work now.

To find the bInterfaceNumber I used lsusb -v which give you much gory detail.
Hope this helps

[JanUmbhau]

Hi nitsanw! I'm new to Linux and am having the same problem. Where exactly do I insert and/or create a new file with the content you posted above? I'm a little reluctant to type anything into the Terminal, without verifying beforehand that that's where the code should go :) Thanks in advance!

[nitsanw]

The fix is now on a fork:
https://github.com/nitsanw/ipad_charge
I need to further test it and I will submit as PR.

[JanUmbhau]

Thanks!

[nitsanw]

@botcs @JanUmbhau WFM :), try the PR and report back

[botcs]

make succesful, but still not WFM.

when iPad mini connected, returns the following:
./ipad_charge
ipad_charge: no such device or an error occured

However my iPad charges... a bit nasty, I don't know where could be actually the problem

[0ki]

Thanks, @nitsanw!
Your patch worked for me.
Here is a compiled version of ipad_charge as patched: http://02.lv/f/2017/01/21/ipad_charge

[freeRain19]

@0ki , thanks a lot. This file help me.

[jeffsturgis]

Thanks @nitsanw! Patch works great!

[Silfalion]

it worked for me too, thanks a lot!