Random Screensaver Image

[IanScuffling]

Originally Posted by Mingyar

If it helps, for my 3 Kobo readers, I almost lost patience before I finally had the expected success. I didn't count the sleep and stop times before the images finally appeared.

Originally Posted by Dougr33

Agreed... I went spastic reinstalling, redoing, trying everything. Took untold number of sleep/power cycles to start working, but eventually did, and now does so reliably, so I'm very grateful for this hack. Have the Clara HD, and the only weird thing is that my 'line' is diagonal across the left upper corner area, but the picture then fills and looks great. It is possible, as stated above, that the best thing is to set a 5min timeout, and just let it keep cycling naturally.

Thanks to both of you. I will continue to be patient. It's probably good for me!

Originally Posted by IanScuffling

Thanks to both of you. I will continue to be patient. It's probably good for me!

Good luck. Here's something weird: right after mentioning that my 'line' ran diagonally across a corner (and the picture filled in top then bottom), it started running normally! After more than a month of the weird behavior. Anyway, glad to have this hack.. like having my choice of screensavers.

[MGlitch]

The 4/2 firmware update seems to have tossed an odd issue in to this. It still works on my Forma though it goes to a blank sleep screen then to the image. However that’s not the odd issue I’m writing about.

This no longer reflects the rotation of the screen. It will always display as if the buttons were on the left.

[IanScuffling]

After more than a month, my screensaver started showing up!

[cila]

Hello,

Thanks a lot for this amazing thread. Looks like I just have the same problem as @IanScuffling...

I follow all the steps, the .tar is gone and the .addons has been sucessfully created, but looks like it's not working

And I wish I do not have to wait months to have it works..

Any Idea ? Maybe author of the OP ?

Thanks

[Mingyar]

Maybe someone who have the same kobo model could post the config file.

[Owl_]

Originally Posted by frostschutz

This uses fbink instead of pngshow to display scanline and image. (No fancy debugging yet - sorry.)

You have to re-detect scanline for this version. Remove old scanline value from screensaver.cfg, then let the device drop into standby, and from standby into poweroff. (Wait some time between those steps. Scanline detection takes a few seconds, and if you just rebooted, some seconds before the mod is even active.)

My H2O is using 4.8.11073 firmware, and detected these scanlines:

#
# Standby scanline autodetected Sat Oct 27 18:18:56 CEST 2018
#   If this value does not work, remove it so it will be re-detected.
#
standby=1231: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


#
# Poweroff scanline autodetected [1] Sat Oct 27 18:19:17 CEST 2018
#   If this value does not work, remove it so it will be re-detected.
#
poweroff=1231: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

It worked on a Kobo Aura One (NOT limited edition) running the firmware 4.13.12638

PS: I first disabled in the settings:
-battery indicator while charging
-show current read in sleeping mode

I set 5 minutes to sleeping mode and 10 to powered off

It'd need a debug/change in order to be easily installed

Anyway

[frostschutz]

Please note this is a built-in feature since Firmware 4.13 according to @davidfor
---> https://www.mobileread.com/forums/sh....php?p=3868795 <---

[DNSB]

Originally Posted by frostschutz

Please note this is a built-in feature since Firmware 4.13 according to @davidfor
---> https://www.mobileread.com/forums/sh....php?p=3868795 <---

I've also tested it and it works on my Clara HD and Aura One.

[momo3513]

Originally Posted by frostschutz

AutoShelf・FlashCard・HyphenDicts・MagicMemory・MiniClock・NickelIcons・ScreenSaver・UsbDebug・WebPortal・(GitHub)

--- ScreenSaver ---

This mod displays a random "screensaver" PNG image on sleep/poweroff.

Please note this is a built-in feature since Firmware 4.13 according to @davidfor
---> https://www.mobileread.com/forums/sh....php?p=3868795 <---

=== Installation steps: ===

1. Disable "Show current read" in Kobo's privacy/power settings.
   (mod requires blank Sleeping / Poweroff screens)
2. copy KoboRoot-ScreenSaver*.tgz » .kobo/KoboRoot.tgz
3. eject/umount device, disconnect the USB cable
   (mod does not work while charging)
   
   --- KoboRoot.tgz will automatically install & reboot ---
   
4. let the device go to sleep (by either setting timeout, or pressing power button)
   (mod should display an automatically detected scanline for standby)
   Attachment 151716
   
5. let the device power off (by either setting timeout, or holding power button)
   (mod should display an automatically detected scanline for poweroff)
   Attachment 151717
   
   --- ScreenSaver should now be fully operational ---
   [Some people reported they had to repeat steps 4 & 5 to make it work.]
   
6. Put your images in .addons/screensaver/{standby,poweroff} folders.

=== Configuration: ===

There is a configuration file in .addons/screensaver/screensaver.cfg
Don't edit it with MS Notepad - use Notepad++ or any proper editor instead.

It contains automatically detected scanline offset/pattern which is used to verify that the device is showing the Sleeping / Poweroff screen to be replaced with screensaver images.

Example for autodetected values of my H2O:

Spoiler:

#
# Standby scanline autodetected [1] Sun Sep 18 12:54:13 CEST 2016
#   If this value does not work, remove it so it will be re-detected.
#
standby=1288:ffff*31a60000*7bcfffff*ffdf*ffff*0000*c638ffff*f79e39e70000*8430ffff*21040000*b5b6ffff*f79e39e70000*8430ffff*21040000*b5b6ffff*d69a000039e7528a18e30000*2965c6180861000018e35acb52aa29450000*ad55ffff*b596086139e74a4918c30000*2124ffff*d6ba08414208528a21040000*31a6ffffad750000*212408410000*630cffff*630c0000*2965bdf7ffff*84300000*18c3ffff*


#
# Poweroff scanline autodetected [1] Sun Sep 18 12:56:30 CEST 2016
#   If this value does not work, remove it so it will be re-detected.
#
poweroff=1288:0000*b596ffff*4a490000*2945ffff*39e70000*18e3ce59ffff*632c0000*52aaffff*21240000*a514e73cbdd7c618ffff*5aeb0000*6b4dffff*0000*18e3ffff*4a490000*0861c618ffff*7bcf0000*defbffff*4a490000*2945f7bebdf7ad75defbffff*ce7900005acbffff*d69a7befffff*6b4d0000*0861c618ffff*7bcf0000*defbffff*4a490000*b596ffff*b5b629650000*0020a514ffff*f7be0000*18e3ce59ffff*632c0000*52aaffff*21240000*6b6dffff*6b6dffff*0000*

The value represents offsetattern, the pattern is a single line of pixels at the given offset.

0000* is one or more black pixels, ffff* is one or more white pixels, other values are things in between. standby patterns usually start/end with ffff* (white background), poweroff with 0000* (black background).

These values might be misdetected or stop working after firmware update or when changing to a different language. You have to remove previously detected values in order to re-detect new ones.

To uninstall this mod, set uninstall=1 in this configuration file.

=== Images: ===

You can put your images in the .addons/screensaver/{standby,poweroff} folders. The images must be in PNG format.

Supports up to about 1000 files, depending on filename length. (shorter is better). Image dimensions and offsets depends on your device, please adapt accordingly. Small filesizes are better - reduce color to grayscale (16 colors) or black/white.

Old (pre 4.x) version text:

Spoiler:

This mod displays a random PNG image on sleep/poweroff. You can put your images in a hidden .addons/screensaver folder. Sample images included.

The image must be in PNG format, no spaces in the filename, extension .png (lower case). Not too many files in total (at most 1000 or so, maybe more if the file names are very short!).

Please report whether the mod works for you, (and on which device,) thanks!

To install, KoboRoot-ScreenSaver.tgz » .kobo/KoboRoot.tgz

There have been several changes:

• Instead of /.ScreenSaver/ the folder is now in .addons/screensaver/
  I will be moving all of my mods to .addons/ in the near future so there are not twenty things in the main directory.
• There is a configuration file in .addons/screensaver/screensaver.cfg
  Use a proper editor to edit it, not MS Notepad!
  Note: the configuration file will be created a few seconds after the device boots up and starts nickel. If you connect to PC instantly it may not be there yet and you have to reboot the Kobo and give it a few seconds - I'll fix this issue in a future version)
• Two modes of operation: logread (the method used so far), scanline (a new method that requires setup but supports different image sets for sleep and poweroff)
• Uninstall is now by setting uninstall=1 in the config file.

It appears the log messages the mod was using for logread mode no longer exist in 3.18.0 and there are no others to replace them, either. So you're now forced to use scanline mode ...

How to use Scanline mode: https://www.mobileread.com/forums/sh...35#post3165835

Spoiler:

----

The mod no longer works with 4.x firmware (Kobo Aura One - September 2016).

I attached an experimental version for 4.x firmware below. I do not have an Kobo Aura One so I can not test it myself. It works on my H2O running 4.x firmware.

This version uses a new method (inotify affiliate.conf) to detect standby/poweroff. It no longer supports previous logread/scanline modes so there is nothing to configure anymore (except when you want to uninstall the mod).

The inotify might also work for older firmwares - I have not tested.

Please note for the 4.x version the images moved into subfolders .addons/screensaver/standby/ and .addons/screensaver/poweroff/

---
The mod no longer works for 4.2.8283 (Kobo Aura One January 2017) Firmware.

Experimental version for 4.2.+ here https://www.mobileread.com/forums/sh...04#post3463704
---

Latest experiment version here: https://www.mobileread.com/forums/sh...00#post3766000

Hello! I just got my Kobo Clara HD, and I tried this hack to the letter, as far as I can tell. My issue is that although I can tell the device is registering the PNG files as I see them as "books", I can't get them to appear as a power off or sleep screen.

My process was:
1. Downloaded the KoboRoot-ScreenSaver-20181216 zip file.
2. Extracted the files
3. Renamed the KoboRoot-ScreenSaver-20181216.tgz to KoboRoot.tgz
On the Kobo:
4. Turned off the Show Current Read option
5. Mounted the device and the file explorer opened up
6. Went into the .kobo file and pasted the KoboRoot.tgz file
7. Ejected the device and unplugged when the notification for removing safely appeared
8. The Kobo did reboot, but I didn't see the line that you describe, I don't believe
9. Remounted the device and found the .addon file
10. Pasted in my choice image as a PNG file amongst the existing options
11. Uninstalled that configuration using Notepad++ like recommended

Like I said, I can see the images in the books section as PNG files, but my power off and sleep screens still read "Power off" and "Sleeping".

Do you have any tips you could offer as to what I may have missed?

[MGlitch]

You missed this

Originally Posted by frostschutz

Please note this is a built-in feature since Firmware 4.13 according to @davidfor
---> https://www.mobileread.com/forums/sh....php?p=3868795 <---

The mod hasn’t been updated because it’s no longer needed. Kobo implemented it.

[frostschutz]

FWIW I just updated (newer fbink version) and it still works for me on my H2O on latest firmware, though it needed an additional reboot to detect things properly.

But yeah, the builtin is what you should try first, provided you're running new enough firmware and you don't mind it using the same images for sleep vs. poweroff. The builtin is guaranteed to work, this addon can't help but use such a roundabout method...

Maybe in the future there will be a more reliable method to make a screensaver addon, I'm not very active lately but others are doing amazing work.

[DNSB]

Originally Posted by momo3513

Hello! I just got my Kobo Clara HD, and I tried this hack to the letter, as far as I can tell. My issue is that although I can tell the device is registering the PNG files as I see them as "books", I can't get them to appear as a power off or sleep screen.

Spoiler:

My process was:
1. Downloaded the KoboRoot-ScreenSaver-20181216 zip file.
2. Extracted the files
3. Renamed the KoboRoot-ScreenSaver-20181216.tgz to KoboRoot.tgz
On the Kobo:
4. Turned off the Show Current Read option
5. Mounted the device and the file explorer opened up
6. Went into the .kobo file and pasted the KoboRoot.tgz file
7. Ejected the device and unplugged when the notification for removing safely appeared
8. The Kobo did reboot, but I didn't see the line that you describe, I don't believe
9. Remounted the device and found the .addon file
10. Pasted in my choice image as a PNG file amongst the existing options
11. Uninstalled that configuration using Notepad++ like recommended

Like I said, I can see the images in the books section as PNG files, but my power off and sleep screens still read "Power off" and "Sleeping".

Do you have any tips you could offer as to what I may have missed?

Place your screensaver images in a directory called screensaver inside the .kobo directory. Please note that the directory name is case sensitive. I suggest using images close to the screen size of your Kobo (I modified my image choices to match the screen size and gray scaled them at the same time using ImageWorsener).

Under Settings => Energy saving and privacy, I have Show current read and Show book covers full screen checked.

[VickyT]

Bonjour,

Je viens d'acquérir une Kobo Libra H2O, est-il possible de personnaliser l'écran de veille sur ce modèle (je souhaite le même en mode "veille" et en mode "éteint") ?

Quelle résolution doit faire l'image dans ce cas ? (liseuse 7 pouces)

Suis-je obligée d'installer KoboRoot.tgz ? (sur ma Kobo aura H2O édition 2 ça ne fonctionnait pas, je voyais mon écran de veille personnalisé dans l'écran d'accueil - mélangé à mes livres - mais il n'apparaissait pas lors de la veille de l'écran ou lorsque la Kobo était éteinte).

Bref, Kobo a-t-il pris en compte cette demande de personnalisation et peut-on faire la manipulation plus simplement en allant directement dans les dossiers système de l'appareil pour copier-coller l'image désirée comme économiseur d'écran ?

Je vous remercie par avance

[DNSB]

Originally Posted by VickyT

Bonjour,

Je viens d'acquérir une Kobo Libra H2O, est-il possible de personnaliser l'écran de veille sur ce modèle (je souhaite le même en mode "veille" et en mode "éteint")?

You might want to read the message immediately above yours.