MobileRead Forums - View Single Post - KOReader and Plato both fail on my Clara BW

leaston · 08-09-2025, 06:21 PM

EDIT: It seems to be solved. I found another post where someone had the same issue and followed the solution posted on Reddit, here:
https://www.reddit.com/r/koreader/co...mment/n4d02zc/
I downloaded the latest nightly build and replaced the /.adds/koreader directory with the one in the nightly zip file and KOReader seems to be up and running.
Plato still doesn't work and I need to see if I can find a fix for it. In the meantime, I'll just use KOReader.

Hi,
I have tried a few times to install KOReader and Plato on my Clara BW (latest firmware) with no luck so far.

I have followed the instructions in both post 1 and 2 of the 'One-Click Install Packages for KOReader & Plato' thread with the same result each time.

Once installed, I can see the NickelMenu and both apps listed. If I select KOReader, there's a pause for around 5 seconds, the backlight goes off, the 3 dot progress indicator shows briefly on screen and it just takes me right back to the main Kobo screen with the backlight back on.

If I select Plato, the backlight goes off, the screen remains the same, but the Clara GUI completely freezes. I have to use the power button in order get the Kobo to work again.

After the initial 'Updating' on screen after the install and the reboot, here's what I see on my Clara:
https://imgur.com/a/QSprGE1
Image 1 is the main screen showing some weird new 'books'.
Image 2 is what I see if I click on the one on the right 'unknown author'.
Image 3 is the PowerShell results, clearly showing everything worked.

Has anyone any ideas please? I'm baffled

In case it helps, here's the final entry in the KOReader log file:
[*] Current time: 08/09/25-23:09:53
has monolibtic? no (libs/libkoreader-monolibtic.so: cannot open shared object file: No such file or directory)
lib_search_path: libs/?
lib_basic_format: lib%s.so
lib_version_format: lib%s.so.%s[*] Version: v2025.04

ffi.load: rt.so.1 (RTLD_GLOBAL)
ffi.findlib: utf8proc [3]
ffi.load: libs/libutf8proc.so.3
ffi.findlib: blitbuffer
ffi.load: libs/libblitbuffer.so
./luajit: frontend/device/kobo/device.lua:1791: unrecognized Kobo model spaBWTPV with device id 395
stack traceback:
[C]: in function 'error'
frontend/device/kobo/device.lua:1791: in main chunk
[C]: in function 'probeDevice'
frontend/device.lua:53: in main chunk
[C]: in function 'require'
./reader.lua:151: in main chunk
[C]: at 0x00013e71
!!!!
Uh oh, something went awry... (Crash n°5: 08/09/25 @ 23:09:53)
Running FW 4.42.23296 on Linux 4.9.77 (#1 SMP PREEMPT 821e4df-20250506T120645-B0506121817)
Too many consecutive crashes, aborting . . .
!!!! ! !!!!
Restoring original fb bitdepth @ 32bpp & rotation @ 3
[FBInk] Unidentified Kobo device code (395)!
[FBInk] Detected a Kobo Unknown! (395 => ?? @ Mark ?)
[FBInk] Explicit EPDC wakeup isn't supported on this device
[FBInk] Clock tick frequency appears to be 100 Hz
[FBInk] Screen density set to 167 dpi
[FBInk] Variable fb info: 1072x1448, 32bpp @ rotation: 3 (Counter Clockwise, 270°)
[FBInk] Fixed fb info: ID is "hwtcon", length of fb mem: 6243328 bytes & line length: 4288 bytes
[FBInk] Canonical rotation: 0 (Upright, 0°)
[FBInk] Fontsize set to 16x16 (IBM (Default) base glyph size: 8x8)
[FBInk] Line length: 67 cols, Page size: 90 rows
[FBInk] Horizontal fit is perfect!
[FBInk] Vertical fit isn't perfect, shifting rows down by 4 pixels
[FBInk] Framebuffer pixel format: RGBA
[FBDepth] Screen is 1072x1448 (1072x1456 addressable, fb says 1072x1448)
[FBDepth] Buffer is mapped for 6243328 bytes with a scanline stride of 4288 bytes
[FBDepth] Current bitdepth is already 32bpp!
[FBDepth] Current rotation is already 3!

08-09-2025, 06:21 PM	#1
leaston Addict Posts: 265 Karma: 1135030 Join Date: Nov 2010 Location: England Device: Boox Go Color 7, Kobo Forma, Kindle Keyboard	[ALMOST SOLVED] KOReader and Plato both fail on my Clara BW EDIT: It seems to be solved. I found another post where someone had the same issue and followed the solution posted on Reddit, here: https://www.reddit.com/r/koreader/co...mment/n4d02zc/ I downloaded the latest nightly build and replaced the /.adds/koreader directory with the one in the nightly zip file and KOReader seems to be up and running. Plato still doesn't work and I need to see if I can find a fix for it. In the meantime, I'll just use KOReader. Hi, I have tried a few times to install KOReader and Plato on my Clara BW (latest firmware) with no luck so far. I have followed the instructions in both post 1 and 2 of the 'One-Click Install Packages for KOReader & Plato' thread with the same result each time. Once installed, I can see the NickelMenu and both apps listed. If I select KOReader, there's a pause for around 5 seconds, the backlight goes off, the 3 dot progress indicator shows briefly on screen and it just takes me right back to the main Kobo screen with the backlight back on. If I select Plato, the backlight goes off, the screen remains the same, but the Clara GUI completely freezes. I have to use the power button in order get the Kobo to work again. After the initial 'Updating' on screen after the install and the reboot, here's what I see on my Clara: https://imgur.com/a/QSprGE1 Image 1 is the main screen showing some weird new 'books'. Image 2 is what I see if I click on the one on the right 'unknown author'. Image 3 is the PowerShell results, clearly showing everything worked. Has anyone any ideas please? I'm baffled In case it helps, here's the final entry in the KOReader log file: [] Current time: 08/09/25-23:09:53 has monolibtic? no (libs/libkoreader-monolibtic.so: cannot open shared object file: No such file or directory) lib_search_path: libs/? lib_basic_format: lib%s.so lib_version_format: lib%s.so.%s[] Version: v2025.04 ffi.load: rt.so.1 (RTLD_GLOBAL) ffi.findlib: utf8proc [3] ffi.load: libs/libutf8proc.so.3 ffi.findlib: blitbuffer ffi.load: libs/libblitbuffer.so ./luajit: frontend/device/kobo/device.lua:1791: unrecognized Kobo model spaBWTPV with device id 395 stack traceback: [C]: in function 'error' frontend/device/kobo/device.lua:1791: in main chunk [C]: in function 'probeDevice' frontend/device.lua:53: in main chunk [C]: in function 'require' ./reader.lua:151: in main chunk [C]: at 0x00013e71 !!!! Uh oh, something went awry... (Crash n°5: 08/09/25 @ 23:09:53) Running FW 4.42.23296 on Linux 4.9.77 (#1 SMP PREEMPT 821e4df-20250506T120645-B0506121817) Too many consecutive crashes, aborting . . . !!!! ! !!!! Restoring original fb bitdepth @ 32bpp & rotation @ 3 [FBInk] Unidentified Kobo device code (395)! [FBInk] Detected a Kobo Unknown! (395 => ?? @ Mark ?) [FBInk] Explicit EPDC wakeup isn't supported on this device [FBInk] Clock tick frequency appears to be 100 Hz [FBInk] Screen density set to 167 dpi [FBInk] Variable fb info: 1072x1448, 32bpp @ rotation: 3 (Counter Clockwise, 270°) [FBInk] Fixed fb info: ID is "hwtcon", length of fb mem: 6243328 bytes & line length: 4288 bytes [FBInk] Canonical rotation: 0 (Upright, 0°) [FBInk] Fontsize set to 16x16 (IBM (Default) base glyph size: 8x8) [FBInk] Line length: 67 cols, Page size: 90 rows [FBInk] Horizontal fit is perfect! [FBInk] Vertical fit isn't perfect, shifting rows down by 4 pixels [FBInk] Framebuffer pixel format: RGBA [FBDepth] Screen is 1072x1448 (1072x1456 addressable, fb says 1072x1448) [FBDepth] Buffer is mapped for 6243328 bytes with a scanline stride of 4288 bytes [FBDepth] Current bitdepth is already 32bpp! [FBDepth] Current rotation is already 3! Last edited by leaston; 08-09-2025 at 06:50 PM.