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Old 04-03-2025, 07:10 AM   #1
Aadvik5951
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Change Screensaver to custom image on HF Firmware

Is there a way to change the screensaver on HF firmware?
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Old 04-03-2025, 07:22 AM   #2
Piecho
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Default Koreader setting work to me

You can choose a book cover or a custom image as screensaver via this menu:

TOP MENU / / Screen / Screensaver
You can use JPG/PNG files as screensaver (properly dithered grayscale images look best). Transfer the files from your computer into any folder on your device. And choose this folder as your screensaver folder via this menu:

TOP MENU / / Screen / Screensaver / Settings
Please refer to this Mobileread forum post for advanced information about preparing screensaver
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Old 04-03-2025, 09:29 AM   #3
Aadvik5951
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Natively, please.
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Old 04-03-2025, 10:47 AM   #4
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Old 04-03-2025, 11:11 AM   #5
Aadvik5951
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Please?
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Old 04-03-2025, 03:49 PM   #6
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The thing is, Kindles are very fussy about the formatting (dimensions, bit depth, etc) of the screensavers; the values tend to vary between Kindle models and there is a real risk your Kindle will end up in a boot loop if you mess it up.

Now, if you still want to go ahead despite the warning, the easiest way to do this on HF firmware is as follows:
  1. Inspect the file properties (e.g. right-click -> properties -> details on Windows) of your default kindle screensavers, which are located in folder /usr/share/blanket/screensavers on your Kindle
  2. Use this tool to convert your desired source images to the required screensaver format, by feeding the correct values identified in step 1
  3. Send the converted files to /usr/share/blanket/screensavers, either by copying them alongside the original screensavers, or by replacing them.

Good luck!
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Old 04-03-2025, 10:33 PM   #7
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I noticed that while my Kobo ereaders didn't care about the images placed in their screensaver directory (colour was rendered as B&W, size was stretched, etc.), my Kindle PW4 crashed when I placed a couple of colour images of M. C. Escher art in the screensavers directory. I also tried renaming them to replace an existing screensaver but still crashed. I finally ended up editing the images to match the characteristics (size & colour depth) of an existing image and then they worked.
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Old 04-04-2025, 05:38 AM   #8
Aadvik5951
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How to change from read only to read and write without mntroot rw(that does not work)?
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Old 04-04-2025, 09:00 AM   #9
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That's the only way to do it.
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