I'm having a similar problem. Error report reads...
calibre, version 5.13.0
ERROR: Error: Error communicating with device
Failed to upload file named: driveinfo.calibre to ('SD Part2',): 2:PTP Layer error 2002: LIBMTP_Send_File_From_Handler(): Could not send object.
2:Error 2002: PTP General Error
Traceback (most recent call last):
File "calibre/gui2/device.py", line 89, in run
File "calibre/gui2/device.py", line 512, in _books
File "calibre/devices/mtp/driver.py", line 220, in books
File "calibre/devices/mtp/driver.py", line 192, in get_driveinfo
File "calibre/devices/mtp/driver.py", line 182, in _update_drive_info
File "calibre/devices/mtp/driver.py", line 153, in put_calibre_file
File "calibre/devices/mtp/base.py", line 25, in synchronizer
File "calibre/devices/mtp/unix/driver.py", line 400, in put_file
calibre.devices.errors.DeviceError: Failed to upload file named: driveinfo.calibre to ('SD Part2',): 2:PTP Layer error 2002: LIBMTP_Send_File_From_Handler(): Could not send object.
2:Error 2002: PTP General Error
The Kindle and SD card appear as icons on the Calibre menu bar and I can see the basic directory structure but no files (books or otherwise) are shown.
Deleting the driveinfo.calibre files made no difference. I couldn't find any metadata.calibre files.
This is on a Linux laptop. When I try on a Windows laptop the Device icons appear on the menu bar but Calibre then shuts down!
This is not a huge problem as I can move books around easily enough by other means but I was trying to use the USB link to fix a problem with displaying book covers.
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