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Medion Lifetab S9714 (medion-kai)

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Revision as of 14:09, 11 January 2020 by Bonsaiblue (talk | contribs) (adding section about wifi)
Lenovo Medion Lifetab S9714
Medion Lifetab S9714
Medion Lifetab S9714
Manufacturer Lenovo
Name Medion Lifetab S9714
Codename medion-kai
Released 2012
Hardware
Chipset NVIDIA TEGRA 3
CPU NVIDIA TEGRA 3 Quad-Core 1.2 GHz
GPU NVIDIA TEGRA 3 (Ultra Low Power GeForce)
Display 1280 x 800 touchscreen
Storage 32 GB internal storage
Memory 1 GB
Architecture armv7
Software
Original software Android 4.0 / 4.1
postmarketOS
Category testing
Pre-built images no
Features
Flashing
Works
USB Networking
Works
Internal storage
No data
SD card
No data
Battery
No data
Screen
Works
Touchscreen
Works
Multimedia
3D Acceleration
No data
Audio
No data
Camera
No data
Camera Flash
No data
Connectivity
WiFi
No data
Bluetooth
No data
GPS
No data
NFC
No data
Modem
Calls
No data
SMS
No data
Mobile data
No data
Miscellaneous
FDE
No data
USB OTG
No data
HDMI/DP
No data
Sensors
Accelerometer
No data
Magnetometer
No data
Ambient Light
No data
Proximity
No data
Hall Effect
No data
Haptics
No data
Barometer
No data


Contributors

Maintainer(s)

Users owning this device


How to enter flash mode

To start fastboot mode:

  1. boot into recovery by holding volume-down and power button at the same time, then
  2. adb reboot bootloader

To unlock bootloader in fastboot mode (CAUTION: this will erase userdata! Backup before doing this!): fastboot oem unlock

Installation

My procedure was:

  1. Backup all important user data
  2. Unlock bootloader (see above)
  3. Install CWM recovery by going into fastboot mode and then running fastboot flash recovery A2109_CWMrecovery-6.0.1.9d.img
  4. Backup Android installation on SD card
  5. Follow installation guide (note that flashing rootfs can take a few minutes without feedback, just wait)
  6. After flashing has finished, the screen should show the Medion logo and a notice saying "Cold booting linux"; after that, the postmarkedOS logo and then the demo should come up.

Notes

Apparently, the device was manufactured by Lenovo for vendor Medion and is similar to Lenovo's A2110 / A2109 boards. Some information about the IdeaTab A2109.


WiFi

Still trying to get WiFi working. Collected information so far:

Chip for WLAN 11b/g/n and Bluetooth 3.0: Broadcom BCM4330

PCI id according to system/etc/nvram_4330.txt: 14e4:4360

Kernel config parameters in vendor's config:

   grep -i "bcm" config | grep -v "^#"
   CONFIG_BCMDHD_CFG80211=y
   CONFIG_BCMDHD_WIFI_CONTROL_FUNC=y
   CONFIG_BCMDHD_HW_OOB=y
   CONFIG_BCMDHD_CSCAN_ENABLE=y
   CONFIG_BCMDHD_INSMOD_NO_FW_LOAD=y
   CONFIG_BCMDHD_FXN_FW_PATH="/system/vendor/firmware/bcm4330/fw_bcmdhd.bin"
   CONFIG_BCMDHD_FXN_NVRAM_PATH="/system/etc/nvram_4330.txt"
   CONFIG_BCMDHD_FXN_195_89=m
   CONFIG_BCMA_POSSIBLE=y

BCM-related files in vendor's ROM:

   find . -iname "*bcm*"
   system/vendor/firmware/bcm4330
   system/vendor/firmware/bcm4330/fw_bcmdhd_p2p.bin
   system/vendor/firmware/bcm4330/fw_bcmdhd.bin
   system/vendor/firmware/bcm4330/fw_bcmdhd_apsta.bin
   system/lib/modules/bcmdhd.ko
   system/etc/firmware/bcm4330.hcd
   system/bin/bcm4330_bt_fw_loader.sh
   find . -iname "*4330*"
   system/vendor/firmware/bcm4330
   system/etc/nvram_4330.txt
   system/etc/firmware/bcm4330.hcd
   system/bin/bcm4330_bt_fw_loader.sh


What I tried so far:

  • Created subpackage $pkgname-nonfree-firmware:nonfree_firmware for device-medion-kai locally, including fw_bcmdhd.bin, nvram_4330.txt, fw_bcmdhd_apsta.bin, fw_bcmdhd_p2p.bin, mfg.bin, all are copied to /lib/firmware/postmarketos/bcm4330/
  • Adjusted CONFIG_BCMDHD_FXN_FW_PATH and CONFIG_BCMDHD_FXN_NVRAM_PATH accordingly
  • Rebuilt and flashed
  • Configured /etc/network/interfaces according to WiFi#Using_wpa_supplicant

Result:

   sudo /etc/init.d/networking restart
    * Starting networking ...
    *   lo ...
   ip: RTNETLINK answers: File exists                                                        [ !! ]
    *   wlan0 ...
   ip: ioctl 0x8913 failed: No such device                                                   [ !! ]
    * ERROR: networking failed to start

Related links:

See also