[ROM][UNLOCKED][UNOFFICIAL][BETA] LineageOS 14.1 for the LeapFrog Epic

[blakegriplingph]

Disclaimer

/*
* This ROM can and will kill your cat, deprive you of your social life
* and cause problems with your device if you aren't careful.
* This firmware contains chemicals known to the State of California
* to cause cancer and birth defects or other reproductive harm.
* You have been warned.
*/

LineageOS needs no introductions. This is an unofficial port of Nougat for the LeapFrog Epic, a children's educational Android tablet released in 2015 yet still hasn't received a major operating system update since then, despite the Epic being (theoretically) capable of running anything newer than Kitkat, or perhaps even PostmarketOS for that matter.

- EVEN MORE IMPORTANT:
The ROM will only work with an unlocked bootloader which removes signature enforcement on both SP Flash Tool and whenever the tablet boots up. Links to the hacked preloader, LK and TWRP recovery image can be found here. Flashing these can be a risky proposition so it is advised to do a full EMMC backup of the device prior to modding your Epic. A backup procedure can be found on this blog post.

- IMPORTANT:
You should only flash Magisk via TWRP as updating or installing it via the manager will cause a boot loop. In case you end up with such an issue just flash the ROM again and you should be fine.

Also, this does not come with a kids' mode UI and will cut you off from LeapFrog online services such as the App Centre and the Academy programme. You may however download the LeapFrog Academy app from the Play Store (assuming you installed an OpenGapps package, duh...) Whether it is possible to bring back the kids and parents launcher along with some services through a flashable zip is yet to be determined, but that wouldn't be a priority issue for now.

Installation instructions
- Unlock the bootloader and install TWRP
- Boot to TWRP by pressing volume up + power
- Wipe system, data and cache
- Install the LineageOS zip you just downloaded
- ...
- PROFIT!

Rules
- Please search the thread before asking questions
- Please try to stay on topic, I know it's not always possible
- Please report bugs here
- Report only one issue per bug report
- When reporting bugs please post a logcat and/or dmesg containing pertinent information regarding the issue...

Prerequisites for Installation
- Unlocked Bootloader
- TWRP Installed

Downloads
*** Please do NOT create any mirrors ***
Lineage-14.1 for the LeapFrog Epic

Source Code
- Device Tree: https://github.com/mt8127-tadpole/android_device_quanta_narnia
- Kernel Source: https://github.com/mac2612/android_kernel_alcatel_ttab
- Vendor Tree: https://github.com/mt8127-tadpole/android_vendor_quanta_narnia

Thanks
- LineageOS
- Mac2612 for the kernel-side work
- Stricted for the ttab kernel sources
- Diplomatic for his knowledge of MediaTek internals
- ggow because I kanged most of the text on this OP from him

XDA:DevDB Information
LineageOS, ROM for the LeapFrog Epic

Contributors
mac2612
blakegriplingph
Kai2000
R0rtiz
Stricted

ROM OS Version: 7.1.2 Nougat

Version Information
Status: Beta
Stable Release Date: TBA?

Created 2020-08-26
Last Updated 2020-09-08

 

[blakegriplingph]

Working
* HWC
* Wifi/Bluetooth
* 2D/3D acceleration
* Accelerometer
* Touchscreen
* Audio (internal and headset)
* Internal microphone
* Basic camera stuff (front and back)

Not Working
* NVRAM has issues (SELinux permissions?)
* Video recording crashes the camera app
* Battery life is pathetically horrible and needs optimisation
* Some performance issues due to certain services
* HWC/ION error log spam
* 1080p video lag (codec issues? LOS14.1 for ford also has similar problems apparently. Videos are rendered through software)
* You tell me

 

[blakegriplingph]

And here's a quick demo video of the ROM in action:

 

[Stricted]

nice to see this finally working

 

[bigrammy]

Working
* HWC
* Wifi/Bluetooth
* 2D/3D acceleration
* Accelerometer
* Touchscreen
* Audio (internal and headset)
* Internal microphone

Not Working
* NVRAM has issues (SELinux permissions?)
* Video recording crashes the camera app
* Battery life is pathetically horrible and needs optimisation
* Some performance issues due to certain services
* HWC/ION error log spam
* 1080p video lag (codec issues? LOS14.1 for ford also has similar problems apparently. Videos are rendered through software)
* You tell me

Congratulations :highfive: https://www.xda-developers.com/developers-port-lineageos-leapfrog-epic-tablet-for-children/

Well deserved recognition :good: :good:

 

[blakegriplingph]

Congratulations :highfive: https://www.xda-developers.com/developers-port-lineageos-leapfrog-epic-tablet-for-children/

Well deserved recognition :good: :good:

Thanks guys! I'm actually tempted to port Pie or 10 to the Epic based on the efforts of one dude who did a similar feat on his Galaxy S2, but I thought it would be a monumental task especially with 10 requiring system-as-root.

 

[TheDeveloperDude95]

Thanks guys! I'm actually tempted to port Pie or 10 to the Epic based on the efforts of one dude who did a similar feat on his Galaxy S2, but I thought it would be a monumental task especially with 10 requiring system-as-root.

I cant believe you did it, congrats:victory:
Hey, you want to make a Leapfrog Epic Development telegram

 

[plarfman]

Now thats epic

 

[ggow]

Really good to see this, nice job :good:

 

[blakegriplingph]

Really good to see this, nice job :good:

Thanks! We actually tried using your kernel at some point but that proved to be a pain to set up, so we decided to just kang the kernel sources and blobs off @Stricted's ttab build instead.

That being said we do need some aid on optimising the build though, but this is hampered by the fact that not everyone has an Epic with them, not unless they have kids who outgrew this device lol.

 

[blakegriplingph]

@Ziona @ggow Any ideas on how to fix them lingering issues with the battery tho?

 

[Ziona]

@Ziona @ggow Any ideas on how to fix them lingering issues with the battery tho?

I'm going to help if possible, but bare in mind without having a test device its extremely hard to aid in this well.

 

[blakegriplingph]

I'm going to help if possible, but bare in mind without having a test device its extremely hard to aid in this well.

I understand. Not sure if you could pick up one at your place for one.

 

[Ziona]

I understand. Not sure if you could pick up one at your place for one.

That wont be possible, did you also get to confirm that the device is entering deep sleep state , an not stuck in Partial Wake Lock.

 

[blakegriplingph]

That wont be possible, did you also get to confirm that the device is entering deep sleep state , an not stuck in Partial Wake Lock.

I haven't actually checked yet tbh.

 

[Ziona]

I haven't actually checked yet tbh.

If the device is not then battery will suffer.
Try by adding smart kernel manager app an check deep sleep state after screen is off a minute or so an then back on.

On first screen menu theirs a CPU uptime listing, check if no deep sleep is listed .

 

[blakegriplingph]

If the device is not then battery will suffer.
Try by adding smart kernel manager app an check deep sleep state after screen is off a minute or so an then back on.

On first screen menu theirs a CPU uptime listing, check if no deep sleep is listed .

I'll see what I can do.

 

[blakegriplingph]

Lol that spam wasn't expected.

Anyway, I'd like to continue on with this, but my friends and I do need help in regards to the issues I outlined in the first page.

 

[x_orange90_x]

Nice work!

Is this a practically usable build, or more of an experimental project? My son (5 1/2yrso) has an Epic and I'm terribly frustrated at how dated it has become simply because of KitKat rather than the actual hardware. I wanted to put PBS Kids Games app on it this morning and it's giving me an about Crosswalk Project Services. I tried manually installing that and it still just doesn't work.

If this is just an experimental project, is there anything post-KitKat that would be for me?

Thanks, and again, Great Work!

 

[blakegriplingph]

Nice work!

Is this a practically usable build, or more of an experimental project? My son (5 1/2yrso) has an Epic and I'm terribly frustrated at how dated it has become simply because of KitKat rather than the actual hardware. I wanted to put PBS Kids Games app on it this morning and it's giving me an about Crosswalk Project Services. I tried manually installing that and it still just doesn't work.

If this is just an experimental project, is there anything post-KitKat that would be for me?

Thanks, and again, Great Work!

Apologies for the late reply, but I've been busy lately with various other matters so I haven't really had the time to tend to this project. It is for the most part functional, but battery life is abysmal and hardware video codecs are for some reason not working.