KOreader no longer launches

[Drogba72]

My Kindle has been working with KOreader for months.
I recently downloaded books through Calibre, and since then, when I try to open KOreader, it just goes blank and then returns to the main screen. Is this a known issue, please?

Thanks in advance.

[beckster]

Your kindle might have updated.

[mergen3107]

Turn off wi-fi, restart (simple restarts) your Kindle twice, then run Hotfix “book”.
If you didn’t do the OTA blocking, then this is a good time as well

[Drogba72]

This is an 11th generation Kindle. Firmware version 5.16.2.1.1 (40975300002).

OTA blocking should already have been installed.
I looked here https://www.mobileread.com/forums/sh...d.php?t=225030 for the Kindle hotfix, but I can't find it. Do you have a link, please?

[mergen3107]

Try this version for now: https://github.com/KindleModding/Hot...es/tag/v1.14.0

[mergen3107]

Also, OTA blocking needs not only install, but also activation in KUAL

[Drogba72]

I downloaded the file https://github.com/KindleModding/Hot...es/tag/v1.14.0
On the Kindle, I restored the OTAs, connected the Kindle to the PC, set the .bin file to root, unplugged the Kindle, and launched the update. When I reorganized, I opened the hotfix book in the library. In KUAL, I blocked updates again.
I tried launching KOreader, but it redirects me to the main menu.

[mergen3107]

What does crash.log in KOReader folder tell you?

[Drogba72]

Crash.log :

---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 06/17/25-18:45:16
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: v2024.11

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
ffi.findlib: sqlite3 [0]
ffi.load: libs/libsqlite3.so.0
ffi.findlib: fbink_input [1]
ffi.load: libs/libfbink_input.so.1
[FBInk] /dev/input/event0: `bd71828-pwrkey` = KEY | POWER_BUTTON
[FBInk] /dev/input/event1: `pt_mt` = TOUCHSCREEN
[ko-input] Forked off fake event generator (pid: 7575)
06/17/25-18:45:16 INFO initializing for device KindleBasic4
06/17/25-18:45:16 INFO framebuffer resolution: {
h = 1448,
w = 1072
} --[[table: 0xb6470828]]
ffi.findlib: wrap-mupdf
ffi.load: libs/libwrap-mupdf.so
ffi.findlib: freetype [6]
ffi.load: libs/libfreetype.so.6
ffi.findlib: harfbuzz [0]
ffi.load: libs/libharfbuzz.so.0
ffi.findlib: zstd [1]
ffi.load: libs/libzstd.so.1
./luajit: ./ffi/zstd.lua:41: Src size is incorrect
stack traceback:
[C]: in function 'error'
./ffi/zstd.lua:41: in function 'zstd_uncompress'
frontend/persist.lua:124: in function 'deserialize'
frontend/persist.lua:224: in function 'load'
frontend/fontlist.lua:171: in function 'getFontList'
frontend/ui/font.lua:157: in main chunk
[C]: in function 'require'
frontend/ui/widget/button.lua:20: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttontable.lua:2: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttondialog.lua:43: in main chunk
[C]: in function 'require'
frontend/apps/filemanager/filemanagerconverter.lua:5: in main chunk
[C]: in function 'require'
frontend/ui/quickstart.lua:5: in main chunk
[C]: in function 'require'
./reader.lua:248: in main chunk
[C]: at 0x00013ead
lipc-wait-event exited normally with status: 0
---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 06/20/25-19:34:31
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: v2024.11

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
ffi.findlib: sqlite3 [0]
ffi.load: libs/libsqlite3.so.0
ffi.findlib: fbink_input [1]
ffi.load: libs/libfbink_input.so.1
[FBInk] /dev/input/event0: `bd71828-pwrkey` = KEY | POWER_BUTTON
[FBInk] /dev/input/event1: `pt_mt` = TOUCHSCREEN
[ko-input] Forked off fake event generator (pid: 9133)
06/20/25-19:34:32 INFO initializing for device KindleBasic4
06/20/25-19:34:32 INFO framebuffer resolution: {
h = 1448,
w = 1072
} --[[table: 0xb6d39820]]
ffi.findlib: wrap-mupdf
ffi.load: libs/libwrap-mupdf.so
ffi.findlib: freetype [6]
ffi.load: libs/libfreetype.so.6
ffi.findlib: harfbuzz [0]
ffi.load: libs/libharfbuzz.so.0
ffi.findlib: zstd [1]
ffi.load: libs/libzstd.so.1
./luajit: ./ffi/zstd.lua:41: Src size is incorrect
stack traceback:
[C]: in function 'error'
./ffi/zstd.lua:41: in function 'zstd_uncompress'
frontend/persist.lua:124: in function 'deserialize'
frontend/persist.lua:224: in function 'load'
frontend/fontlist.lua:171: in function 'getFontList'
frontend/ui/font.lua:157: in main chunk
[C]: in function 'require'
frontend/ui/widget/button.lua:20: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttontable.lua:2: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttondialog.lua:43: in main chunk
[C]: in function 'require'
frontend/apps/filemanager/filemanagerconverter.lua:5: in main chunk
[C]: in function 'require'
frontend/ui/quickstart.lua:5: in main chunk
[C]: in function 'require'
./reader.lua:248: in main chunk
[C]: at 0x00013ead
lipc-wait-event exited normally with status: 0
---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 06/20/25-19:45:02
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: v2024.11

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
ffi.findlib: sqlite3 [0]
ffi.load: libs/libsqlite3.so.0
ffi.findlib: fbink_input [1]
ffi.load: libs/libfbink_input.so.1
[FBInk] /dev/input/event0: `bd71828-pwrkey` = KEY | POWER_BUTTON
[FBInk] /dev/input/event1: `pt_mt` = TOUCHSCREEN
[ko-input] Forked off fake event generator (pid: 21562)
06/20/25-19:45:03 INFO initializing for device KindleBasic4
06/20/25-19:45:03 INFO framebuffer resolution: {
h = 1448,
w = 1072
} --[[table: 0xb6471778]]
ffi.findlib: wrap-mupdf
ffi.load: libs/libwrap-mupdf.so
ffi.findlib: freetype [6]
ffi.load: libs/libfreetype.so.6
ffi.findlib: harfbuzz [0]
ffi.load: libs/libharfbuzz.so.0
ffi.findlib: zstd [1]
ffi.load: libs/libzstd.so.1
./luajit: ./ffi/zstd.lua:41: Src size is incorrect
stack traceback:
[C]: in function 'error'
./ffi/zstd.lua:41: in function 'zstd_uncompress'
frontend/persist.lua:124: in function 'deserialize'
frontend/persist.lua:224: in function 'load'
frontend/fontlist.lua:171: in function 'getFontList'
frontend/ui/font.lua:157: in main chunk
[C]: in function 'require'
frontend/ui/widget/button.lua:20: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttontable.lua:2: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttondialog.lua:43: in main chunk
[C]: in function 'require'
frontend/apps/filemanager/filemanagerconverter.lua:5: in main chunk
[C]: in function 'require'
frontend/ui/quickstart.lua:5: in main chunk
[C]: in function 'require'
./reader.lua:248: in main chunk
[C]: at 0x00013ead
lipc-wait-event exited normally with status: 0
---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 07/01/25-19:41:44
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: v2024.11

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
ffi.findlib: sqlite3 [0]
ffi.load: libs/libsqlite3.so.0
ffi.findlib: fbink_input [1]
ffi.load: libs/libfbink_input.so.1
[FBInk] /dev/input/event0: `bd71828-pwrkey` = KEY | POWER_BUTTON
[FBInk] /dev/input/event1: `pt_mt` = TOUCHSCREEN
[ko-input] Forked off fake event generator (pid: 7382)
07/01/25-19:41:45 INFO initializing for device KindleBasic4
07/01/25-19:41:45 INFO framebuffer resolution: {
h = 1448,
w = 1072
} --[[table: 0xb6b9f498]]
ffi.findlib: wrap-mupdf
ffi.load: libs/libwrap-mupdf.so
ffi.findlib: freetype [6]
ffi.load: libs/libfreetype.so.6
ffi.findlib: harfbuzz [0]
ffi.load: libs/libharfbuzz.so.0
ffi.findlib: zstd [1]
ffi.load: libs/libzstd.so.1
./luajit: ./ffi/zstd.lua:41: Src size is incorrect
stack traceback:
[C]: in function 'error'
./ffi/zstd.lua:41: in function 'zstd_uncompress'
frontend/persist.lua:124: in function 'deserialize'
frontend/persist.lua:224: in function 'load'
frontend/fontlist.lua:171: in function 'getFontList'
frontend/ui/font.lua:157: in main chunk
[C]: in function 'require'
frontend/ui/widget/button.lua:20: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttontable.lua:2: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttondialog.lua:43: in main chunk
[C]: in function 'require'
frontend/apps/filemanager/filemanagerconverter.lua:5: in main chunk
[C]: in function 'require'
frontend/ui/quickstart.lua:5: in main chunk
[C]: in function 'require'
./reader.lua:248: in main chunk
[C]: at 0x00013ead
lipc-wait-event exited normally with status: 0
---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 07/06/25-12:09:41
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: v2024.11

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
ffi.findlib: sqlite3 [0]
ffi.load: libs/libsqlite3.so.0
ffi.findlib: fbink_input [1]
ffi.load: libs/libfbink_input.so.1
[FBInk] /dev/input/event0: `bd71828-pwrkey` = KEY | POWER_BUTTON
[FBInk] /dev/input/event1: `pt_mt` = TOUCHSCREEN
[ko-input] Forked off fake event generator (pid: 4194)
07/06/25-12:09:42 INFO initializing for device KindleBasic4
07/06/25-12:09:42 INFO framebuffer resolution: {
h = 1448,
w = 1072
} --[[table: 0xb6c29348]]
ffi.findlib: wrap-mupdf
ffi.load: libs/libwrap-mupdf.so
ffi.findlib: freetype [6]
ffi.load: libs/libfreetype.so.6
ffi.findlib: harfbuzz [0]
ffi.load: libs/libharfbuzz.so.0
ffi.findlib: zstd [1]
ffi.load: libs/libzstd.so.1
./luajit: ./ffi/zstd.lua:41: Src size is incorrect
stack traceback:
[C]: in function 'error'
./ffi/zstd.lua:41: in function 'zstd_uncompress'
frontend/persist.lua:124: in function 'deserialize'
frontend/persist.lua:224: in function 'load'
frontend/fontlist.lua:171: in function 'getFontList'
frontend/ui/font.lua:157: in main chunk
[C]: in function 'require'
frontend/ui/widget/button.lua:20: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttontable.lua:2: in main chunk
[C]: in function 'require'
frontend/ui/widget/buttondialog.lua:43: in main chunk
[C]: in function 'require'
frontend/apps/filemanager/filemanagerconverter.lua:5: in main chunk
[C]: in function 'require'
frontend/ui/quickstart.lua:5: in main chunk
[C]: in function 'require'
./reader.lua:248: in main chunk
[C]: at 0x00013ead
lipc-wait-event exited normally with status: 0
---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 07/06/25-16:04:10
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: v2024.11

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: ./ffi/framebuffer_linux.lua:55: cannot open framebuffer
stack traceback:
[C]: in function 'assert'
./ffi/framebuffer_linux.lua:55: in function 'init'
./ffi/framebuffer_mxcfb.lua:830: in function 'init'
./ffi/framebuffer.lua:140: in function 'new'
frontend/device/kindle/device.lua:1571: in function 'init'
frontend/device.lua:54: in main chunk
[C]: in function 'require'
./reader.lua:151: in main chunk
[C]: at 0x00013ead
---------------------------------------------
launching...
_ _____ ____ _
| |/ / _ \| _ \ ___ __ _ __| | ___ _ __
| ' / | | | |_) / _ \/ _` |/ _` |/ _ \ '__|
| . \ |_| | _ < __/ (_| | (_| | __/ |
|_|\_\___/|_| \_\___|\__,_|\__,_|\___|_|

It's a scroll... It's a codex... It's KOReader!
[*] Current time: 07/07/25-08:27:02
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: v2024.11

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: ./ffi/framebuffer_linux.lua:55: cannot open framebuffer
stack traceback:
[C]: in function 'assert'
./ffi/framebuffer_linux.lua:55: in function 'init'
./ffi/framebuffer_mxcfb.lua:830: in function 'init'
./ffi/framebuffer.lua:140: in function 'new'
frontend/device/kindle/device.lua:1571: in function 'init'
frontend/device.lua:54: in main chunk
[C]: in function 'require'
./reader.lua:151: in main chunk
[C]: at 0x00013ead

[mergen3107]

“cannot open framebuffer”
You need to try installing your hotfix again.

Unless you updated or factory restored Kindle twice in a row…