Quote:
Originally Posted by Marina Peli
Hi! I have Kobo Libra h20 and recently it has started to change pages in a weird way – when I turn the page it flashes all the rows instead of doing it fluently and fast as it did before, almost like it's refreshing rows before putting new letters. I thought it was somehow a Calibre problem but I tried doing a manual reset and opened a Kobo store book – it still does it almost every time it goes out of sleeping mode. After some time it goes away, then starts again. Does this happen to anyone else? I’m desperate at this point as it’s REALLY annoying to the eyes.
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This is a known problem triggered by something in the image being displayed. In a discussion with Kobo, it is related to how much power is being drawn at the drawing that image. It trips a low level event and the panel will refresh itself in 4 or 6 quadrants. I don't believe there is anything that can be done as at least part of it seems to be happening at the hardware level.
It is related to what is in the image. The example I have seen is with covers from the publisher Gateway. These can be an all yellow cover with little more than the title and author on it. The conversion to grey scale generated an image with a lot of small grey dots. That triggered the problem. Using calibre to send the cover produced a cover that didn't trigger this.
When reading, the only times I have seen it are with images. And, that is usually the cover. I would expect it to happen with comics with the "right" images. It is probably possible to fix these, but, I don't think I have ever tried.