Quote:
Originally Posted by jayp2013mobile
Let try a recap. I used to be able to simply connect my Kindle unit to my desktop computer via USB cable ; Calibre would automatically acknowledge the unit and titles previously downloaded to the unit would appeared as "On Device". Not anymore : I seems only able to connect via the wireless option but even that is unstable : if the unit is left unattended for a while, the "On Device" listing disappear from the Calibre interface and yet the Kindle continue to indicate connected. I must manually disconnect then reactivate the wireless option. As suggested, I have disable my anti-virus to check if the problem was there but it did not change anything.
Also titles sent to my Kindle after 29-Nov-15 are not listed as "On Device" although they are sitting in my Kindle. The only major change around then was when I upgraded Calibre to 2.45.0
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OK, so now we know that the fundamental question is not related to CC, but is instead related to calibre and USB. Apparently you were using a cable but that stopped working.
CC sees books that were transferred by CC. It does not see books transferred in other ways such as by a USB connection except in limited ways (the books are in a recognized Amazon format (e.g., not KFX), if the books are stored in CC's folder, and if CC's scan on wireless connect is enabled). Mixing USB and CC connections is not supported.
As for the wireless device connection: network connections time out if not used. Calibre will disconnect if the connection isn't used. The device can disconnect. The wireless network between the two can disconnect. Sometimes these disconnections happen without telling CC.
As for on-device after 29-Nov-15, you don't say *how* these missing books were transferred. If books were transferred using CC then we can help. If they were transferred using a USB cable or by Amazon's "Whispersync" or equivalent then CC won't see them unless the conditions I described above are met.
My apologies, but I feel that we are running in circles here. Your post of 28/2/16 did not say that the problem was with USB connections, and I assumed that you were using CC. You get help with USB connections in the calibre or kindle forums.
So, have you been using CC and not USB since 29-Nov-15? If so, then the advice we have given in previous posts is appropriate. If you have been using USB and that stopped working and you want help with that then you must post in a calibre or kindle forum. CC has no role to play.
If you have been using USB but now are switching to CC then you must ensure that the books on the device are in CC's folder so CC can find them when it connects as a wireless device. You can use a file manager to check this. However, books downloaded directly from Amazon will almost certainly not work with either CC or calibre.
My feeling: you seem to want to use USB. In this case you should post in an appropriate forum for help on making it work.