Calibre stop recognizing Fire after Household Sharing

[juanmatias]

Hello.

Yesterday I synched an Amazon Fire with Calibre. I sent books from my PC to the device.

After that I set up the Family Sharing options, adding an Adult profile.

Today Calibre does not recognize the device.

Device is recognized by the OS (I can operate on files with no problem)

I'm adding here the debug info from Calibre that shows the device is being detected, but there is a problem and it can't be accessed.

I deleted the adult account I have added but there is no changes, still not detected.

What can I do to restore the Calibre-Fire communication?

Data:

$ cat /etc/system-release
Fedora release 27 (Twenty Seven)

$ uname -a
Linux **** 4.14.8-300.fc27.x86_64 #1 SMP Wed Dec 20 19:00:18 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

$ calibre --version
calibre (calibre 3.12)

===================================

calibre 3.12  embedded-python: False is64bit: True
Linux-4.14.8-300.fc27.x86_64-x86_64-with-fedora-27-Twenty_Seven Linux ('64bit', '')
('Linux', '4.14.8-300.fc27.x86_64', '#1 SMP Wed Dec 20 19:00:18 UTC 2017')
Python 2.7.14
Linux: ('Fedora', '27', 'Twenty Seven')
Interface language: es
USB devices on system:
[['0x1949', '0x271', '0xffff', u'Amazon', u'Fire', u'G0W0MA077387FAXV']]

No disabled plugins
Looking for devices of type: MTP_DEVICE
Unknown device USBDevice(busnum=2, devnum=2, vendor_id=0x1949, product_id=0x0271, bcd=0xffff, manufacturer=Amazon, product=Fire, serial=G0W0MA077387FAXV) claims to be an MTP device
MTP devices connected:
USBDevice(busnum=2, devnum=2, vendor_id=0x1949, product_id=0x0271, bcd=0xffff, manufacturer=Amazon, product=Fire, serial=G0W0MA077387FAXV)

Trying to open: USBDevice(busnum=2, devnum=2, vendor_id=0x1949, product_id=0x0271, bcd=0xffff, manufacturer=Amazon, product=Fire, serial=G0W0MA077387FAXV)
Opening device failed:
Traceback (most recent call last):
  File "/usr/lib64/calibre/calibre/devices/mtp/unix/driver.py", line 150, in debug_managed_device_detection
    self.open(d, 'debug')
  File "/usr/lib64/calibre/calibre/devices/mtp/driver.py", line 125, in open
    BASE.open(self, device, library_uuid)
  File "/usr/lib64/calibre/calibre/devices/mtp/base.py", line 25, in synchronizer
    return func(self, *args, **kwargs)
  File "/usr/lib64/calibre/calibre/devices/mtp/unix/driver.py", line 220, in open
    connected_device, as_unicode(e)))
OpenFailed: Failed to open USBDevice(busnum=2, devnum=2, vendor_id=0x1949, product_id=0x0271, bcd=0xffff, manufacturer=Amazon, product=Fire, serial=G0W0MA077387FAXV): Error: Unable to open MTP device with busnum=2 and devnum=2, tried 1 such devices

 
Looking for devices of type: SMART_DEVICE_APP
All IP addresses {u'lo': [{'peer': u'127.0.0.1', 'netmask': u'255.0.0.0', 'addr': u'127.0.0.1'}], u'enp2s0f5': [{'broadcast': u'172.148.0.255', 'netmask': u'255.255.255.0', 'addr': u'172.148.0.31'}]}
No device is connected
 
Looking for devices...
 
Devices possibly connected: None

[juanmatias]

Ok, I did a hard reset, set the Fire up againand still the same problem.

Indeed i tried to start Calibre as Root and the same problem again:

Running Calibre from commandline shows these messages:

$ calibre
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile
Device 0 (VID=1949 and PID=0271) is UNKNOWN in libmtp v1.1.14.
Please report this VID/PID and the device model to the libmtp development team
error returned by libusb_claim_interface() = -6LIBMTP PANIC: Unable to initialize device
Error while trying to open MTPDevice(busnum=2, devnum=3, vendor_id=6473, product_id=625, bcd=65535, serial=u'G0W0MA077387FAXV', manufacturer=u'Amazon', product=u'Fire') (Driver: <calibre.devices.mtp.driver.MTP_DEVICE object at 0x7f5194118750>)
Traceback (most recent call last):
  File "/usr/lib64/calibre/calibre/gui2/device.py", line 295, in detect_device
    dev.open(cd, self.current_library_uuid)
  File "/usr/lib64/calibre/calibre/devices/mtp/driver.py", line 125, in open
    BASE.open(self, device, library_uuid)
  File "/usr/lib64/calibre/calibre/devices/mtp/base.py", line 25, in synchronizer
    return func(self, *args, **kwargs)
  File "/usr/lib64/calibre/calibre/devices/mtp/unix/driver.py", line 220, in open
    connected_device, as_unicode(e)))
OpenFailed: Failed to open MTPDevice(busnum=2, devnum=3, vendor_id=6473, product_id=625, bcd=65535, serial=u'G0W0MA077387FAXV', manufacturer=u'Amazon', product=u'Fire'): Error: Unable to open MTP device with busnum=2 and devnum=3, tried 1 such devices

[juanmatias]

Ok, I don't know what I did, but:

1. I left Fire connected to PC
2. I converted books with Calibre
3. I copied files through file manager from PC to Fire
4. I disconnected Fire
5. I reconnected Fire
6. Calibre did recognize the device and offered me to handle it

Now I can manage the device with Calibre.

Is there a way to debug this just in case it happens again?

[kovidgoyal]

On linux/OS X onlya single program can connect to an MTP device at a time. So make sure your operating system/file manager are not conencting to the Fire.