[Atrix 4G Q&A, Help & Troubleshooting] bironeaj:
No. If i were you I would follow this guide. It will root your phone. This same thinghappened to me and i followed this guide and its works perfectly.

MOTOROLA Atrix 4g Root

TERMS & CONDITIONS

1.	Note: ROOTING you phone WILL NOT allow you to install THEMES or ROMs. You will need to UNLOCK YOUR PHONE'S BOOTLOADER for that.

UPDATE 8/31/11 - WARNING: This will work on other phones besides AT&T, BUT it was designed for AT&T 4.5.91 and created using AT&T files. If you use this on other carrier phones you WILL have a problem installing future updates from Motorola and your carrier. Bell Canada users on 2.2.2 who have already used this and are now trying to update, see the bottom of this post.

This will work on all versions of the Motorola Atrix firmware and on any carrier. Yes, this works even if your bootloader is still locked and you're on the official AT&T 4.5.91; confirmed working on Bell Gingerbread as well (2.3.4 Gingerbread update.) This has been out for sometime, but I was oblivious to it possibly working after updating to 2.3.4. It's very simple and straightforward, just be sure to follow the directions exactly. This works whether you have been previously rooted before or not and even if you already have an old Superuser app.

WARNING: This will modify the system files of your phone and technically VOID YOUR WARRANTY. I will not take any responsibility if anything happens to your phone. Please know what you're doing and why you're doing it. Please read all directions fully at least twice before proceeding so you know what you're about to do. There is NO EASY WAY TO UNROOT this because the new 4.5.91 SBF is only a Service SBF and not Full. It helps, but you might still have to manually uninstall the Superuser.apk as well.

I have tested this on my phone being on AT&T 4.5.91 (2.3.4 Gingerbread) after the official OTA update, with a LOCKED bootloader, previously rooted with Superuser app left over from previous root. You don't need to have been rooted before and you can also have an unlocked bootloader as well.

Below instructions are for Windows only. Download links lead to the original posting website to give them traffic credit.

This method was created and posted to XDA-Developers by A.J. Birone

Motorola Atrix 4g – Complete Guide to root Motorola Atrix 4g

Prerequisites

o	Drivers installed 32-bit or 64-bit

ADB-Fastboot package

o	Root image

Instructions

3.	You may plug your phone in to the PC via USB no and leave it plugged in the entire time.

4.	Extract (you may need to download 7-Zip to extract the files from their .zip) the ADB-Fastboot package and root image to your C:\ Drive under a new folder titled “root” - You should now have everything in C:\root (Please see the picture at the bottom of the post that shows all files that are supposed to be in C:\root)

5.	Put your device into Fastboot mode: – Turn off your device. – Hold down the power button and downward volume button until you see “Fastboot” on your screen – Push the upward volume button to start Fastboot (if you're already plugged in it will auto-reboot,just hold Vol down as it starts to reboot.)

6.	Open your command prompt (Start >> run “cmd” >> enter)

7.	Type the following commands, hitting Enter after each line:

Code:

cd C:/root

fastboot flash preinstall root.img

fastboot reboot

8.	After phone fully reboots (wait about 30 seconds after it comes back up) go in and make sure to enable USB debugging (Settings >> Applications >> Development >> USB Debugging)

9.	Type the following commands, hitting Enter after each line:

Code:

adb shell

/preinstall/dosu

10.	You will now see this error, but this is where you're supposed to be: "bash: groups: command not found

root@localhost:/#"

11.	Type the following commands, hitting Enter after each line:

Code:

/bin/mount /system -o remount,rw

cp /preinstall/su /system/bin/su

chmod 6755 /system/bin/su

PATH=/system/bin:$PATH pm install /preinstall/Superuser.apk

12.	Congratulations! You are rooted!

13.	Type 'exit' and hit Enter each three times to get out of root, ADB shell and the command prompt.

14.	Make sure your USB selection on your phone is set to None and unplug the cable.

15.	You're Done!!

***If you get an error when installing the Superuser.apk, just download the Superuser app from the Market***