[unb3ar]

@NiLuJe: Thank you for such a quick answer! I transfer them over the USB cable, manually copying the books to the device in the documents dir. I could use SSH over Wi-Fi, but I haven't enabled wireless yet; until I'm sure I can fully control the requests Kindle is making over the wire.

With the aid of Calibre, as you suggested, only AZW3 ebook covers showed up. I've noticed the AZW3 file and related .sdr dir must be placed in a newly created dir in documents, which name must be different from the AZW3 file itself, for the cover to be displayed.

Am I missing something or I have to convert the ebooks to AZW3 to be able to see the covers of all the PDF, DjVU and epub ebooks I have?

Is there a way to show at least PDF covers in the home screen - which happens that they're supported?

How does Calibre exactly make it work? It doesn't seem to add any extra content. Does it modify the AZW3 file in such a way to allow Kindle to view the cover? I don't believe so. I found out that if you rename the dir Calibre has created before unplugging the device, the cover won't show anymore. Conversely if you first unplug the device, then reconnect it, you can rename the dir containing the AZW3 file and its .sdr to anything without compromising the display of the cover.

It's just my PW2 behaving oddly because has never been registered? Or is it a consequence of the JB? It appears, as though for a split second, the cover is sometimes displayed, but after the screen is refreshed, it's expunged...