[Asus  Eee Pad Transformer Prime] sparkym3:
I have your ICS root ready, how about we call it TPSparkyRoot. I based my research on code written by Dan Rosenberg (similar to what jchase did with NachoRoot in the fact that chown/chmod follows symlinks even when set during startup), here is a link to that research http://vulnfactory.org/blog/2011/08/25/rooting-the-droid-3/

**UPDATE**

Android's source has been patched so that future OEMs can not leave this hole open by accident.

https://android-review.googlesource.com/#/c/36035/

**UPDATE**

This method has been shown to work on the HTC One X see forum

http://xdaforums.com/showthread.php?t=1644167

Theoretically this should work on Honeycomb versions of the Prime as well, since the Honeycomb update is where I found the flaw that is being exploited. I have confirmed this works on my Prime.

**UPDATE**

This exploit does not currently work for the latest ICS update released (v9.4.2.11 on 1/18/2012). You can use OTA Rootkeeper to backup your root prior to updating using OTA, which I have confirmed to work on my device, (this may not work if you push the update manually).

https://market.android.com/details?id=org.projectvoodoo.otarootkeeper

For the devs out there, it does not to honor the ro.kernel.qemu=1 setting within the local.prop because it is already set to blank by that point by the build.prop

You must have your Prime set up to use adb and your adb location contained in your path variable (windows) or unzip the files from my zip into that directory before running.

**UPDATED**

If you are have issues getting adb working, make sure asus sync is not running, if it is then kill it.

adb shell mv /data/local/tmp /data/local/tmp.bak

adb shell ln -s /data /data/local/tmp

adb reboot

adb shell rm /data/local.prop > nul

adb shell "echo \"ro.kernel.qemu=1\" > /data/local.prop"

adb reboot

adb shell id

//IF ID IS 0/root THEN CONTINUE, ELSE START OVER>

adb remount

adb push su /system/xbin/su

adb shell chown 0.0 /system/xbin/su

adb shell chmod 06755 /system/xbin/su

//UNDO EVERYTHING EXCEPT su

adb shell rm /data/local.prop

adb shell rm /data/local/tmp

adb shell mv /data/local/tmp.bak /data/local/tmp

adb reboot

**UPDATE** As jchase stated "If your device "bootloops" don't stress, just follow through with the commands as it "loops" ro.kernel.qemu can do funky stuff." I did notice this in my rooting but just assumed it was normal as this is my first use of adb.

**UPDATE2**

If you get a permissions error on the call

adb shell "echo \"ro.kernel.qemu=1\" > /data/local.prop"

then you may try

adb shell rm /data/local.prop

And then try the echo command again. This may be due to having rooted prior without cleaning up properly. Thanks to Franky_402 for this piece of info.

I have updated the batch file to include this step, it should still be fine for those who are not having the issue as well.

I have attached a zip file containing the su and a bat file for a more automated process (just pauses when during reboots, don’t hit go until it’s done rebooting). Or, you can run the commands manually and get the su file from the origin http://downloads.androidsu.com/superuser/su-bin-3.0.3.2-efghi-signed.zip

Finally, install Superuser to make it all work https://market.android.com/details?id=com.noshufou.android.su

**UPDATE**

UNROOT

There are multiple was to unroot now that you have root access already (all you need to do is remove the su file; so you could potential skip all the steps before the remount and just add the local.prop manually using a file manager and then reboot).

The one most similar way to how you rooted would be to follow all of the steps above, but replace these 3 lines

adb push su /system/xbin/su

adb shell chown 0.0 /system/xbin/su

adb shell chmod 06755 /system/xbin/su

with this line

adb shell rm /system/xbin/su

This will remove the actual root, but it would leave behind any apps that you have given root access to or any files that those apps changed themselves (i.e. RootKeeper backs up the su file and the backup would need to be removed). If you had anything like this you would need to clean up that first before unrooting because it is a dead giveaway that it was rooted.

Viperboy should be releasing his tool shortly that utilizes this method, if you would like a one click process that installs apps along with it (superuser, busybox). I’m guessing it installed them to the root apps directory so these also would need to be removed when unrooting as well (i.e. if you root using his new tool you should unroot using it as well).

**UPDATED** Remove PayPal link in favor of link over there <-