yes I meant : when the device goes to sleep and then off (I set it to go to sleep after 10 mn and to power itself off after 15 mn). When it shuts down, the cover of the books I was reading doesn't show the next time I power it on.
Where do I find Kobo utilities plugin ? From now on, I have to run Calibre with my mini PC that run with Ubuntu, I don't even know if Calibre keeps up to date, it never asks to update, but I don't check every update that are asked by the system quite every day.
What if I signed out and then on again et afterward put back my SD card to clear all and rebuilt the database ?
As for the page number in the right margin : I checked the box, returned to my reading : the page number was gone (it should have been the contrary), I returned in the parameters, unchecked the box et resume reading : all was ok. Then I had to work a bit (my boss is adamant about this
) and when I powered it on again, the page numbre was back...