Maylong M-285 Seems OK! /Rooting?
Posted 27 May 2012 - 09:01 AM
M-285 Mobility Tablet PC Specifications:
CPU 1.0 GHz Cortex A8 with 3D accelerator
Memory RAM 512MB DDR
Flash 4GB Built-in Flash Drive
Display Touch Panel 7" TFT LCD(capacitive)
Resolution 800 X 480 Pixels, Auto-rotate screen
Camera 0.3M Pixel
Resistive type touch panel
Speaker Two built-in loud speakers 1W
SD/MMC One MicroSD card slot compatible with up to
32GB SD card
USB Mini USB 2.0 x 1
Buttons/Switches Power On/Off, Speakers volume Up/Down
Battery Built-in Li-Polymer battery
AC Charger Input DC 110-220V AC
Output 5V DC 2A
Physical Characteristics Dimension 7.5" X 4.6" X 0.3"
Weight 13 OZ
Environment Conditions Temperature Operation 0-50¡ãC
Humidity Operation 0-90%, Non-Condensed
Storage 0-90%, Non-Condensed
I'm hoping someone can point me to a rooting process. It has Android Ice cream 4.0 on it W/Updates.
I'm A Experienced Linux(Ubuntu Mainly) W/ A Bit Of Terminal Skill...
The Tablet Is Very Responsive Gets Bogged Down On Heavy Flash Sites. For The Specs It Seems To Do OK. I'd Like To Squeeze All I Can Out Of It.
I Am All The Way New To Tablets. I Had A Velocity Cruz T301 That I Ran S. Hills Custom Rom, On. But, I Sold Due To Flash And Hardware Limitations. This Tab Seems Alot Better!
Any Help @ All Will Be Very Much Appreciated.
Posted 10 June 2012 - 08:31 AM
I have discovered the following about the M-285;
1 Android 4.0.3 operating system, Kernel 3.0.8+ and Root Access from factory.
2 SU is installed from factory. System, rootfs and data files all appear to be rw instead of ro from the
factory (cat /proc/mounts to verify). Also using a Terminal Emulator I get the $ prompt initally and after typing su I get the # prompt.
3 SuperUser installs from Google Play,appears to work and was able to update SU Binaries.
4 Root Check Basic installs from Google Play and verifies that I have Root Access.
5 Titanium Backup installs from Google Play and appears to work. Purchased Pro Version and all seems to work.
6 Hold Power and Menu Button during power up to enter Recovery Mode.(None of the keys work and must hold Power Button down to get out of the mode).
7 Was able to enter Safe Mode once but don't remember what keys I held down during power up.
8 Has an undocumented HDMI output that requires an HDMI Mini to HDMI cable. My TV reported it as 1080P. Also when connected to my TV via HDMI the TV displays whatever is on the M-285 display.
9 The camera is front facing only, has options for 5,3,2,1 M Pixels or VGA plus Video or Panoramic mode.
10 Will charge from the USB Port in addition to the supplied AC Wall Charger.
While playing with the tablet and ADB trying to get CWM Recovery installed I managed to pretty much kill the thing. Boots to the Maylong Screen three times and then hangs. ADB commands and shell still work so all is not lost.
I found the following post after the disaster and was able to get CWM V126.96.36.199 installed and it appears to work very well. Unfortunately I don't have a backup to restore from.
Download this file, unzip it and push recovery.img file to /sdcard.
Then you have to execute this command, with root priviledges, on "Terminal Emulator" or "adb shell":
cat /sdcard/recovery.img > /dev/block/nandg
sync; sync; sync
Now CWM is installed on your device.
Using CWM I was able to install the latest ROM from this link http://www.androidfi...stiantroy/roms/ and it loaded but the touch screen does not work.
Not exactly what finally worked but the tablet is now restored (I think using the Christian Troy ROM above). Somewhere along the line the touchscreen started to working again.
I did not have a backup of my stock ROM as stated but did have Titanium Backup of all my apps and data which I used to restore all my apps at the end. I also had backed up my original /dev/block/nanda, nandb, nandc, nandd, nande, nandf, nandh and nandi files to my sdcard.
I found that information at this link http://androidforums...ge-mid9742.html
The process is dependent upon ABD shell, and busybox.
Open ABD shell and enter the following a line at a time.
cat /dev/block/nanda > /sdcard/dump/bootloader.img
cat /dev/block/nandc > /sdcard/dump/boot.img
cat /dev/block/nandg > /sdcard/dump/recovery.img
By using the following syntax I was able to restore the original Maylong bootloader.img and boot.img which allowed me to get back into CWM Recovery in one case.
cat bootloader.img > /dev/block/nanda
cat boot.img > /dev/block/nandc
cat recovery.img > /dev/block/nandg (Note: This recovery.img was downloaded and is not the original)
NOTE: None of this may work in another case and is probably not all that helped me recover the M-285. I have now also made two backups using CWM Recovery. Should be OK in the future.
NOTE: To boot into CWM Recovery, hold down the Power and Menu buttons. Seems like I remember you also have to hold down the Menu button when using the ' ADB reboot recovery ' command to get into CWM Recovery.
This post has been edited by My Tablet: 25 June 2012 - 08:17 PM