[Kindle 7] No device found on Linux-Debian

[54321guest]

Debug Report::

calibre 7.0 embedded-python: True
Linux-6.1.0-13-amd64-x86_64-with-glibc2.36 Linux ('64bit', 'ELF')
('Linux', '6.1.0-13-amd64', '#1 SMP PREEMPT_DYNAMIC Debian 6.1.55-1 (2023-09-29)')
Python 3.11.5
Interface language: None
USB devices on system:
[['0x138a', '0x18', '0x78', '', '', 'd3bc9e5148cc'],
['0x1949', '0x271', '0xffff', 'Amazon', 'Fire', 'G0W0N5048253F0W8'],
['0x4f2',
'0xb2f8',
'0x6026',
'Chicony Electronics Co.,Ltd.',
'HP Truevision HD',
'0x0001']]

No disabled plugins
Looking for devices of type: MTP_DEVICE
MTP devices connected:
USBDevice(busnum=4, devnum=2, vendor_id=0x1949, product_id=0x0271, bcd=0xffff, manufacturer=Amazon, product=Fire, serial=G0W0N5048253F0W8)

Trying to open: USBDevice(busnum=4, devnum=2, vendor_id=0x1949, product_id=0x0271, bcd=0xffff, manufacturer=Amazon, product=Fire, serial=G0W0N5048253F0W8)
Opening device failed:
Traceback (most recent call last):
File "calibre/devices/mtp/unix/driver.py", line 214, in open
File "calibre/devices/mtp/base.py", line 24, in synchronizer
File "calibre/devices/mtp/unix/driver.py", line 166, in create_device
libmtp.MTPError: Unable to open MTP device with busnum=4 and devnum=2, tried 1 such devices

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre/devices/mtp/unix/driver.py", line 144, in debug_managed_device_detection
File "calibre/devices/mtp/driver.py", line 137, in open
File "calibre/devices/mtp/base.py", line 24, in synchronizer
File "calibre/devices/mtp/unix/driver.py", line 217, in open
calibre.devices.errors.OpenFailed: Failed to open USBDevice(busnum=4, devnum=2, vendor_id=0x1949, product_id=0x0271, bcd=0xffff, manufacturer=Amazon, product=Fire, serial=G0W0N5048253F0W8): Error: Unable to open MTP device with busnum=4 and devnum=2, tried 1 such devices


Looking for devices of type: SMART_DEVICE_APP
All IP addresses {'lo': [{'addr': '127.0.0.1', 'netmask': '255.0.0.0', 'peer': '127.0.0.1'}], 'wlo1': [{'addr': '10.0.0.228', 'netmask': '255.255.255.0', 'broadcast': '10.0.0.255'}]}
No device is connected

Looking for devices...

Devices possibly connected: None

[54321guest]

*FIRE 7 (7th Gen)

[Quoth]

Make sure not mounted for File System because it's MTP.

[kovidgoyal]

Only one program can access MTP devices at a time on Linux. Prevent your desktop/file manager from automounting the device and it will work in calibre.