[marinheiro]

I have a Kindle Paperwhite which has stopped working with Calibre. It used to work with an earlier version of Calibre, but I haven't used it for a while, and just discovered it won't work with my current Calibre, version 3.44.0 (I know this isn't the very latest but I prefer to stick with the version that comes with the Ubuntu distribution).

I'm on Linux. If I don't start Calibre, and connect through the USB port, the Kindle appears at /dev/sda and /dev/sda1, and I can manually mount it and access the contents. The Kindle shows the USB Drive Mode page.

If instead I start Calibre, Calibre recognizes the Kindle, reads the contents, and immediately after unmounts the Kindle. After that /dev/sda is present, but there is no /dev/sda1. The Kindle itself goes straight to its homepage. Calibre, however, doesn't seem to recognize that the Kindle has gone away (the device still appears on the dashboard), and Calibre still shows me the list of books on the Kindle. Of course, if I try to run a command (eg. copy book to Kindle) Calibre gives me an error message: it can't see /media/myname/kindle. Which is correct, because its gone away.

The Kindle is unmodified: I have never rooted it, I've only ever side-loaded books to it, and I have done a full reset and deleted *.calibre from it. Any suggestions for anything else I can try?

Thanks
Graham