No Jailbreak on Touch Lux 4

Turminder · 12-20-2025, 02:13 PM

Hello to a new forum!

I recently got a PB627. KoReader is already working nicely, but I'd like to go a few extra steps and make some changes in system folders.

I tried to jailbreak it; there seems to be only this option. I tried executing @Jailbreak.app of v6 (older) and v8 (latest), but it gets stuck, does not reboot, then, after pressing the devices Home button, I get the last message that says "Rooting failed" or some such.
Rebooting manually does not help either.

KoReader has a terminal, but I just get permission denied for /mnt/secure/su. Probably for the whole folder, so I'm not sure 'su' even got copied there.

uname -a says

Linux pocketbook 3.0.8-hg+default-5aef0455b9aa #1 PREEMPT Mon Jul 11 09:46:07 UTC 2022 armv7l GNU/Linux

And the Software version is

U627.6.5.2898
Released 20220720_182323
Localization: WW

Could this be the reason why it does not work? Too new? Exploit fixed?

______________________

FWIW, all I really want is to maybe lighten the system and make koreader launch immediately, autostart type.

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12-20-2025, 02:13 PM	#1
Turminder Junior Member Posts: 1 Karma: 10 Join Date: Dec 2025 Device: PocketBook Touch Lux 4	No Jailbreak on Touch Lux 4 Hello to a new forum! I recently got a PB627. KoReader is already working nicely, but I'd like to go a few extra steps and make some changes in system folders. I tried to jailbreak it; there seems to be only this option. I tried executing @Jailbreak.app of v6 (older) and v8 (latest), but it gets stuck, does not reboot, then, after pressing the devices Home button, I get the last message that says "Rooting failed" or some such. Rebooting manually does not help either. KoReader has a terminal, but I just get permission denied for /mnt/secure/su. Probably for the whole folder, so I'm not sure 'su' even got copied there. uname -a says Linux pocketbook 3.0.8-hg+default-5aef0455b9aa #1 PREEMPT Mon Jul 11 09:46:07 UTC 2022 armv7l GNU/Linux And the Software version is U627.6.5.2898 Released 20220720_182323 Localization: WW Could this be the reason why it does not work? Too new? Exploit fixed? ______________________ FWIW, all I really want is to maybe lighten the system and make koreader launch immediately, autostart type.