Thread: Kobo Firmware 2.4.0
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Old 02-20-2013, 11:56 PM   #211
mconh
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Posts: 68
Karma: 112688
Join Date: Oct 2011
Location: Cambridge Ontario
Device: Kobo Touch, Glo, AuraHD, AuraH20
Quote:
Originally Posted by davidfor View Post
I have seen that a couple of times as I have changed firmware. The first time it scared me, but I just had to do something to refresh the home page, I stopped worrying.

For the recent firmware, the cover images for books on the SD card are generated on the fly each time they are needed. They are no longer stored in the main memory. And any cover images stored for them will be ignored.

The white bars down the side are probably because of how the images are generated. The device is using the first page of the book as the cover. That means if the cover image in the book does not fill the page, there will be empty stripes down the side. And the generation is done with the settings you use for reading the book. If you have non-zero margins set in you reader settings, these will be used. This is how it has been done for all firmware versions.

The only thing I can think of for "high definition full screen covers" is that you are using calibre to send the covers to the device. I don't think the driver sends the covers when sending the books to the SD card, but if it does, they will be ignored. I'll have to check what the driver does and fix it if needed.

I thought the SD card and cover related changes started with 2.1.4, but it might have been 2.2.0.

Thanks for the info Davidfor.

On the home screens I also had multiple dead taps to get to the home screen, the dreaded book behind loading and everything was sluggish on all four units. I tried uninstall to factory on one new Glo and reinstalled 2.4 with no change.

I reverted all four units to 2.1.5. The normal home screens, speed and full screen covers are all back to normal.

Since the books and the settings did not change on the downgrade it must be the firmware that caused ALL the covers on all four units to have white stripes on the sides. I use all Zero margins. On the first reboot and sleep the full cover screens were back on all units with 1.1.5. While I understand the reason for changing how the covers are generated, I think it has caused as many problems as it has solved.

I think I will stick with 2.1.5 which seems to be the most stable release since 1.9.17.
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