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appears. It can be accessed using a tool called uuu from a package mfgtools to start e.g. uboot from USB. So cat /dev/zero >/dev/mmcblk0 does not brick the device,
appears. It can be accessed using a tool called uuu from a package mfgtools to start e.g. uboot from USB. So cat /dev/zero >/dev/mmcblk0 does not brick the device,
only a wrong U-Boot might be a problem.
only a wrong U-Boot might be a problem.
== Accessing eMMC ==
The eMMC can be exported as mass storage also in factory u-boot enabling full backups by the following command:
  ums 0 mmc 0


== Installation ==
== Installation ==

Revision as of 11:09, 19 February 2022

Kobo Kobo Libra H2O
insides
insides
Manufacturer Kobo
Name Kobo Libra H2O
Codename kobo-librah2o
Released 2019
Hardware
Chipset Freescale i.MX6 SLL
CPU 1x 1 GHz Cortex-A9
GPU PXP + EPDC
Display 1680x1264 eInk
Storage 8GB eMMC
Memory 512M
Architecture armv7
Software
Original software Kobo firmware
postmarketOS
Category testing
Pre-built images no
Mainline yes
Features
Flashing
No data
USB Networking
Works
Internal storage
No data
SD card
No data
Battery
No data
Screen
No data
Touchscreen
Works
Multimedia
Camera Flash
No data
IR TX
No data
Connectivity
WiFi
Works
NFC
No data
Miscellaneous
FDE
No data
USB OTG
No data
HDMI/DP
No data
Sensors
Magnetometer
No data
Ambient Light
No data
Proximity
No data
Hall Effect
No data
Haptics
No data
Barometer
No data


Contributors

  • Andi (has only a device with a broken screen)

Users owning this device


Mainlining status

A basic devicetree is upstream, display waits for testing

How to enter flash mode

Contrary to non-waterproof eBook readers, the Libra H2O does not have an internal replaceable µSD but an internal eMMC, so things have to be flashed on the device. On factory uboot fastboot mode can be entered using pagedown while powering on. Alternatively using the serial console and enter fastboot 0 on the uboot prompt. Note: if nothing which looks like a bootloader is found on startup, the following device

hid-generic 0003:1FC9:0128.001B: hiddev1,hidraw1: USB HID v1.10 Device [   NXP    SemiConductor Inc  SE Blank 6SLL] on usb-0000:00:14.0-6.1/input0

appears. It can be accessed using a tool called uuu from a package mfgtools to start e.g. uboot from USB. So cat /dev/zero >/dev/mmcblk0 does not brick the device, only a wrong U-Boot might be a problem.

Accessing eMMC

The eMMC can be exported as mass storage also in factory u-boot enabling full backups by the following command:

 ums 0 mmc 0

Installation

See also