PocketBook 614 plus (pocketbook-614-plus)
| This device has been archived. This means that it no longer appears in pmbootstrap and is likely broken. It can still be selected in pmbootstrap init by typing in the vendor and codename, but you will have to build the kernel package manually. |
 A broken Pocketbook 614 caused by a folder falling (device was on top) | |
| Manufacturer | PocketBook |
|---|---|
| Name | 614 plus |
| Codename | pocketbook-614-plus |
| Model | PocketBook 614 |
| Released | 2017 |
| Type | ebook reader |
| Hardware | |
| Chipset | Allwinner A13 |
| CPU | ARM Cortex-A8 @ 1Ghz |
| GPU | Mali 400 MP1 |
| Display | 800x600 e-paper |
| Storage | microSDHC |
| Memory | 256 MB |
| Architecture | armv7 |
| Software | |
Original software  The software and version the device was shipped with. |
PocketBook firmware Linux 3.0.8 |
Extended version The most recent supported version from the manufacturer. |
PocketBook firmware |
| FOSS bootloader | yes |
| Nura | |
| Category | archived |
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline. |
no |
pmOS kernel The kernel version that runs on the device's port. |
6.8.0 |
| Device package |
 device-pocketbook-614-plus |
| Kernel package |
linux-postmarketos-allwinner |
Flashing Whether it is possible to flash the device with pmbootstrap flasher. |
Untested
|
|---|---|
USB Networking After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system). |
Works
|
Internal storage eMMC, SD cards, UFS... |
Works
|
SD card Also includes other external storage cards. |
Works
|
Battery Whether charging and battery level reporting work. |
Works
|
Screen Whether the display works; ideally with sleep mode and brightness control. |
Untested
|
| Multimedia | |
3D Acceleration |
Untested
|
| Connectivity | |
WiFi |
Untested
|
| Miscellaneous | |
FDE Full disk encryption and unlocking with unl0kr. |
Untested
|
USB OTG USB On-The-Go or USB-C Role switching. |
Untested
|
| Sensors | |
Accelerometer Handles automatic screen rotation in many interfaces. |
Untested
|
Magnetometer Sensor to measure the Earth's magnetism |
Untested
|
Ambient Light Measures the light level; used for automatic screen dimming in many interfaces. |
Untested
|
Proximity |
Untested
|
Hall Effect Measures magnetic fields; usually used as a flip cover sensor |
Untested
|
Barometer Sensor to measure air pressure |
Untested
|
Power Sensor Sensor to monitor current, voltage and power. Not fuel gauge! |
Untested
|
Primary Bootloader Whether it is possible to replace stock bootloader with U-Boot. |
Works
|
|---|---|
Secondary Bootloader Whether it is possible to chainload U-Boot from stock bootloader. |
Untested
|
Mainline Whether latest upstream versions of U-Boot are not broken and it is possible to use them. |
Works
|
Internal Storage Whether it is possible to boot from internal storage (e.g. eMMC or UFS). |
Works
|
SD card Whether it is possible to boot from SD card. |
Works
|
USB Host Whether it is possible to boot from a USB storage or connect a keyboard. |
Untested
|
USB Peripheral Whether it is possible to use device as a peripheral in U-Boot, e.g. for fastboot mode. |
Works
|
Display |
Untested
|
Keyboard |
Untested
|
Buttons Whether it is possible to navigate in boot menu or grub with volume and power buttons. |
Untested
|
Contributors
Users owning this device
- AlinTriesPorting (Notes: Received from therapy; broken screen, worn out shell)
- Hitechshell
Original software
A regular sdcard is used as internal memory, so we can simply take it out and read/write it on the computer. It is worth noting that the image is tied to a specific sdcard (its serial number), but it is enough to simply untie the image from this dependence.
 |
Note: Before experiments, make a backup copy of the SD card (via dd) |
# fdisk -l /dev/sda
Disk /dev/sda: 7.37 GiB, 7908360192 bytes, 15446016 sectors Disk model: Card Reader Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x00000000 Device Boot Start End Sectors Size Id Type /dev/sda1 1009664 15446015 14436352 6.9G b W95 FAT32 /dev/sda2 * 73728 139263 65536 32M 6 FAT16 /dev/sda3 1 1009664 1009664 493M 85 Linux extended /dev/sda5 139264 172031 32768 16M 83 Linux /dev/sda6 172032 204799 32768 16M 83 Linux /dev/sda7 204800 275455 70656 34.5M 83 Linux /dev/sda8 275456 776191 500736 244.5M 83 Linux /dev/sda9 776192 976895 200704 98M 83 Linux /dev/sda10 976896 1009663 32768 16M 83 Linux Partition table entries are not in disk order.
sda1 - userdata sda2 - boot partition (with kernel) sda5 - ??? sda6 - ??? sda7 - root (/) sda8 - /ebrmain (contain cramfs.img) sda9 - /mnt/secure (contain some apps and libs) sda10 - ??? (contain dictionaries)
Unlinking an image from a specific SD card: after the system starts, the main application is launched - pocketbook located in /dev/sda8 (in fact, this is a link to /mnt/cramfs/bin/monitor.app). This binary contains a check for the serial number of the memory card. However, we can easily cheat this check: replace the path to the serialnumber of sdcard with a simple text file with this number.
copy the cramfs.img file from sda8 and unpack it: cramfsck -x tmp_cram cramfs.img As a result, there will be a monitor.app file in the tmp_cram/bin directory.
Using strings we can find that the program gets the serial number from /sys/block/mmcblk%c/device/serial
Сreate a file with serial number in /mnt/secure (you can do it in another place, the main thing is that the final path is the same length as the line above) and replace path from from /sys/block/mmcblk%c/device/serial to your file.
now just copy the file to sda8, delete the old link and create a new one. ln -s monitor_patched.app pocketbook
Installation
pmbootstrap install --sdcard=/dev/sda
See also
- pmaports!4901 Initial merge request