Quote:
Originally Posted by ZodWallop
I am no help on your actual issue. I'm just replying to:
If you install KoboTouchExtended plugin, you can keep epubs on your hard drive and Calibre will send books to the Kobo as kepubs. No need to convert them yourself.
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Yes, that's exactly the method I'm using to convert epubs.
I select the book or books that interest me, right click, send to device, send specific format to, device memory, double click kepub.
Quote:
Originally Posted by rtiangha
I've noticed something similar too when reading a kepub and it tries to load certain (full size?) images, also on a Glo HD.
If I'm lucky, it's in the middle of the book and I can skip ahead using the table of contents and go backwards, or the slider to go past the problematic page (the image usually renders fine in the preview window, but when I tap it to go to the page, it crashes when it tries to load the image proper.).
If I'm not lucky, it's the cover and it'll immediately crash when I try to open the book. What I have to do in that case is replace the cover image, either by opening it in GIMP, making any kind of change (ex. convert it to black and white, scale it down, crop it, etc.) and replacing it with that, or using Calibre to source a new cover from somewhere else.
When I say crash, I mean it automatically turns off. I'm not sure what it is about these images that triggers a crash, and it isn't a 4.31 issue; I think it started back in the 4.20s; maybe 4.25 or 4.26 or so (but don't quote me on that; haven't kept track too closely). All I remember is that one book I had no problems opening before started to give me issues after a firmware update; I replaced the cover and re-uploaded it and it was fine. I can't remember what book it was and I've just learned to deal with it. Haven't tried other things like using an epub version instead or looking into the book code or image settings; no time. They were sideloaded though, converted with kepubify.
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A solution to your problem could be to change the page setup in common options on Calibre from something like "tablet" which does not alter image resolution to "generic e-ink" this way the images should be lighter (but sadly also a a little more blurry) and then, to make your books "receive" the change of setting, select your books, then convert books and on the first page select restore defaults or ... remove all your books from caliber and then add them again, this should work.
Obviously, do some backups, and if you don't want to waste any time, you might want to try on a single book to see if the method works.
However what happens to you seems different, because I have books with very heavy images, which do not have this problem.