Installing ClockworkMod Touch & Stock Bootloader (1.2)
This guide was last updated 07/03/2012 by Ray
See my video instructions at the bottom of this article.
The NVFlash tool (program) is the PRIMARY Starting Point for any major changes or software fixes to your GTab. If you are having ANY problems with your ViewSonic G-Tablet, this is THE guide to follow.
- Backup any data on the GTab that you wish to save and copy it to some external storage. These procedures potentially delete everything on your GTab.
- Charge the battery to at least 70%. It is also a good idea to leave the power cable connected during these operations.
- Power off the GTab & remove your external SDCard (if you have one in the device).
- Download the NVFlash file from above.
- Extract the archive and rename the extracted folder to nvflash.
- LINUX ONLY: You must make the nvflash file executable – Open the nvflash folder; right-click on the nvflash file; Properties; Permissions tab; Tic the box to run the file as a program. Then - Skip to the “PROCESS” steps below.
- WINDOWS ONLY: INSTALL the APX drivers located in the “Flash USB driver” folder.
- On the GTab, hold the Volume minus (“-”) button AND the power button until the GTab comes on and then goes BLACK (this is the APX mode
- CONNECT the USB cable between the GTab and your computer.
- When the gTablet is detected by Windows, and you are prompted for drivers, point the wizard to the ‘Flash USB Driver’ folder (inside the new “nvflash” folder.
- The driver install should complete normally and you will hear an audible connection sound.
- Power off gTablet by pressing the Power button for ~5 seconds.
- WINDOWS ONLY: If you have not installed the APX/USB drivers, then go back to the “PREREQUISITES.” Step and complete this step first.
- On the GTab, hold the Volume minus (“-”) button AND the power button until the GTab comes on and then goes BLACK (this is the APX mode).
- Connect the USB cable between the GTab and your computer. (If you continued from the previous section, the cable may already be connected.)
- On your computer, open a COMMAND PROMPT (or terminal), CD (change directory) to the nvflash folder & run the NVFlash program: Windows users, run the nvflash_gtablet.bat – Linux users, enter the command, “sudo sh ./nvflash_gtablet.sh” (without the quotes. – note the space after the “sh” and before the “./nvflash” characters.)
- Wait. The NVFlash tool will only take about two minutes to complete. Do not proceed until it reports that it is finished.
- Turn the GTab off by holding the power button until the line of text at the top of the screen disappears.
- Remove the USB cable (You are finished with the computer. Everything else is on the gTab.)
Partition the SDCard
- On the GTab, start ClockWorkMod (CWM) RECOVERY: Hold the power and volume plus (“+”) buttons until the “recovery key detected” text appears at the top of the screen.
- Select “advanced” and press the Home/Enter button (arrow on the right side of the screen).
- Select “Partition Internal SD Card” and press Home.
- Select “4096M” and press Home – then select “0M” and press Home again. The GTab will report that it is “Partitioning Internal SD Card.” Do not touch the device until it reports “Done!” at the bottom of the screen.
- Repeat steps 3 & 4 but select “2048M” & “0M” (rather than 4096M & 0M).
- Select “+++Go Back+++” and press Home.
- Select “power off” and press Home.
Reboot into Stock
If you wish to flash a new custom operating system, here is our list of viable candidates: ROMs for the GTab
Video Instructions for NVFlash & Installing ICS
To determine if your device has the LARGER system partition…
(if you did this NVFlash, then it DOES.)
To check the size of your SYSTEM partition, open the Terminal Emulator app (free on Play Store), enter “df” (without quotes). The “Filesystem” area is at the top of the list (either turn the GTab to portrait mode or scroll up to view the top of the list). Check the line that ends “/system”.
My device (with 250meg system) reads: /dev/block/mtdblock3 253696 216480 37216 85% /system
If your device shows something around 200000 instead of the 253696, then you probably have the smaller (200meg) system partition.
TELL US about your experience in the comments below.
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