ASUS Transformer Pad (asus-tf300t)
![]() ASUS Transformer Pad | |
Manufacturer | ASUS |
---|---|
Name | Transformer Pad |
Codename | tf300t |
Released | 2012 |
Hardware | |
Chipset | Nvidia Tegra 3 T30 |
CPU | Quad-core 1.2 GHz Cortex-A9 |
GPU | ULP GeForce |
Display | 1280x800 IPS |
Storage | 16/32 GB |
Memory | 1 GB |
Software | |
Original software | Android 4.0 on Linux 3.1 |
postmarketOS | |
Category | testing |
Pre-built images | no |
Mainline | no |
Flashing |
No data |
---|---|
USB Networking |
No data |
Internal storage |
No data |
SD card |
No data |
Battery |
No data |
Screen |
No data |
Touchscreen |
No data |
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 |
None of this work has been merged upstream. Check out the work-in-progress here or contact jonty-comp on IRC.
There is a rebased version of jonty-comp's branch on postmarketos/device-asus-tf300t
Contributors
- jonty-comp
- Jasper (working on ASUS Transformer Pad Infinity)
- MartijnBraam
What works
- Compiling CM13 kernel (GitHub)
- Compiling 4.14-rc3 with tf300t specific patches
- Flashing via Android recovery zip (Boot image included)
- System boots
- Most sensors/cameras/devices seem to be detected (e.g. accelerometer values can be read from
/sys
etc)
What does not work
- Flashing via fastboot (device appears to write successfully but then locks up and does not apply the uploaded image)
- Framebuffer (stuck on ASUS bootloader graphic)
The framebuffer issue is an interesting one as it works without issue on CM13-based Android ROMs with the same kernel and defconfig. Possible toolchain issue or patch needed for GCC6.
Devices with a working framebuffer output modesetting information in dmesg
after loading the tegradc driver, but the PMOS compiled kernel does not. Common fixes including setting values in /sys
have no effect yet.
Unlocking
The first step to do anything with the device is unlocking, with this device its done by sideloading the unlock apk from asus and clicking a few buttons in the app. The apk can be found on the asus support page.
Fastboot issue
It seems like the bootloader doesn't handle flashing the boot and userdata partition correctly, the official firmware package flashes an "Android blob" to the staging partition with fastboot which triggers an flashing screen on the tablet which copies the data to the correct partitions.
After unlocking the device the blobs still needs to have some signature which can be generated by drwowe/BlobTools. This repository adds the -s option to sign the generated blobs.
$ ./pmbootstrap.py export /example
...
$ blobpack -s output.blob LNX /example/boot.img-asus-tf300t APP asus-tf300t.img
Found 2 partitions as commandline arguments
Partname: LNX Filename: boot.img-asus-tf300t
Partname: APP Filename: asus-tf300t.img
Size: 60
2 partitions starting at offset 0x3C
Offset: 92
$ fastboot flash staging output.blob
target didn't report max-download-size
sending 'staging' (680522 KB)...
OKAY [113.288s]
writing 'staging'...
FAILED (remote: (InvalidSize))
finished. total time: 116.623s
The update doesn't get updated yet with this code but at least the bootloader doesn't freeze anymore after the flashing command.