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So a last update on the CPU thingy:
First of all, the Tolino Vision Color / Kobo Libra Colour really has a dual core CPU. I am sorry for spreading the rumours of it not working, I was not aware that Koreader is actually shutting down the cores when idling.
I also compared the hwconfig between those and could not spot a relevant difference.
So:
* Either there is a difference in the NTX firmware binary disabling the second core on mine
* Or it _actually_ does not exist.
I stop here now. Still good to know it's possible to overclock to 2 GHz by replacing the kernel, as long as you accept the quirks with the touch screen inversion.
Some speed data: (start of display change/update finished, recorded at 30 fps)
2GHz:
Epub, Koreader,
Normal page flip: 4/9 frames, 6/11 frames 5/10 frames
going from cover page to next page: 6/11 frames
Going back to cover: 30/37 frames
1GHz:
Epub, Koreader, going from image page to next page: 7/13 frames
Going back to image: 26/31 frames
Normal page flip: 6/11 frames 5/10 frames
So... I am really curious why there was no actual speed improvement, honestly it even felt quicker with the fast CPU, but Koreader is really nice already.
Nickel @ 1 GHz, same epub:
page flip: 13/18 13/18 14/19
cover load: 22/30
cover leave: 14/19
Wow...
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