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General Mobile E-Tab 4 (gm-mehmet)

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General Mobile E-Tab 4 (2012)
E-tab 4 front
E-tab 4 front
Manufacturer General Mobile
Name E-Tab 4 (2012)
Codename gm-mehmet
Released 2012
Hardware
Chipset Samsung Exynos 4412 Quad
CPU Cortex-A9
GPU Mali-400 MP
Display 800x1280
Storage 16GB
Memory ~1GB RAM
Architecture armv7
Software
Original software Android
Original version
The version the device was shipped with.
4.2.2
postmarketOS
Category testing
Pre-built images
Whether pre-built images are available here.
no
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Partial
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Untested
Battery
Charging and battery level reporting works
Untested
Screen
Display works. Ideally with sleep mode and brightness control.
Untested
Touchscreen
Untested
Multimedia
3D Acceleration
Untested
Audio
Audio playback, microphone, headset and buttons.
Untested
Camera
Untested
IR TX
Untested
Connectivity
WiFi
Untested
Bluetooth
Untested
GPS
Untested
NFC
Near Field Communication
Untested
Modem
Calls
Untested
SMS
Untested
Mobile data
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
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Untested


This page is WIP

There may be missing or wrong information.

Contributors

  • 19atlas

Users owning this device

  • 19atlas (Notes: android 4.2.2 is too old also device is old)


How to enter flash mode

Press Power + Volume Up to boot into recovery mode (i want to recommend using TWRP Recovery)

For fastboot, try adb reboot fastboot.

Installation

We recommend using recovery mode (ex. twrp). (see)[1]

Mainline component status

Element type Element Works? Notes
Chipset Exynos 4412
Graphics Mali-400MP4
PMIC (Regulators) max77686 Supported in mainline
Fuel gauge MAX17040 Supported by MAX17042 driver
Charger MAX8903 Supported in mainline (though no other DTSes use it yet...)
Touchscreen Focaltech ft5x0x or Atmel MXT1664S Atmel supported, Focaltech unclear (need exact model number, but should be supported by edt-ft5x06 driver?)
Display LTL101AL03 Not in mainline, but should be simple to implement
Backlight PWM backlight Can use the pwm-backlight driver.
Buttons gpio-keys Volume up/down and power button.
Audio WM8985 The codec itself is supported but we might need more to get it to work
Camera ON Semiconductor AS0260 Not in mainline,
GPS UBLOX G6010 Not in mainline
Accelerometer Bosch BMA150 Supported in mainline. Oddly enough, downstream handles it in some Yamaha-related driver (grep for YAS_ACC_DRIVER), drivers/input/misc/yas_cfg.h
Magnetometer Alps HSCDTD007/008 Downstream sources initially led to Yamaha YAS530, grep for YAS_MAG_DRIVER, drivers/input/misc/yas_cfg.h; but dmesg claims HSCDTD007/008. Either way, supported in mainline.
Light sensor ISL29023 Supported in mainline by ISL29018 driver

Some parts of this have been verified with a MEHMET_HW_VE1 [0x7] revision tablet.

See also