This script should do the trick:
DRIVER=/usr/lib/xorg/modules/drivers/fglrx_drv.so
for x in $(objdump -d $DRIVER|awk '/call/&&/EnableLogo/{print "\\x"$2"\\x"$3"\\x"$4"\\x"$5"\\x"$6}'); do
sed -i "s/$x/\x90\x90\x90\x90\x90/g" $DRIVER
done
Or you can download it here. And run it as root.
thank you! so much for this great article a day after published :] i accidently downloaded the ati beta graphics driver for ubuntu and found myself with the dreading amd/ati watermark which was a pretty upsetting feeling but this easy script fixed the issue thank you bud oh yeah! dont run in x server run in terminal keep it up ill bookmark this blog and you should take a look at mine also Computer Repair in San Antonio Blog
For 64 bit versions, change the following line for your lib64 (confirmed on Fedora 17 and Ubuntu 12.04):
DRIVER=/usr/lib64/xorg/modules/drivers/fglrx_drv.so
Titan, you are correct. In fact I first got this script from a Fedora user. So I can confirm for Fedora (idk about ubuntu) that you do have to s/lib/lib64. According to otto (see below) the script works as is for ubuntu 12.04.
So, please note the original script I posted is for 64-bit Debian Wheezy where the 64bit lib dir is simply lib and not lib64.
Good post, the fix/hack works. I tried in ubuntu 12.04 (64bits) with out changing anything to the script and it works.
Your script didn’t work for me (Ubuntu 12.04, AMD64). This one, from http://www.ubunturoot.com/2012/07/remove-amdati-drivers-testing-only.html, worked:
#!/bin/sh
; do
DRIVER=/usr/lib/fglrx/xorg/modules/drivers/fglrx_drv.so
for x in $(objdump -d $DRIVER|awk ‘/call/&&/EnableLogo/{print “\\x”$2″\\x”$3″\\x”$4″\\x”$5″\\x”$6}’
sed -i “s/$x/\x90\x90\x90\x90\x90/g” $DRIVER
done
Thanks, really useful!
About the lib/lib64 problem, why not changing the script like that so we don’t have to bother :
instead of : DRIVER=/usr/lib/xorg/modules/drivers/fglrx_drv.so
this : DRIVER=`find /usr -name ‘fglrx_drv.so’ 2> /dev/null`
like that fglrx_drv.so would be found wherever it is within /usr i think.
I’m getting this error:
objdump: ‘/usr/lib64/xorg/modules/drivers/fglrx_drv.so’: No such file
Using ubuntu 12.04 x64, any ideas?
Wow,
I have fedora 17 64bit and the file was indeed in lib64, not lib 
thank you all, it worked like a charm!
Check /usr/lib/ or /lib. Poke around. Each distro is a little different.
Hello guys,
It works on me. I change the lib to lib64, my OS is Ubuntu 12.10. Maybe the important is the fglrx_drv.so file because when I browse the root folder through /usr the lib64 folder is just a link. I think both ways will work if not thats the time you have to change. Anyway thank you guys for this script, it helps me get rid the AMD watermark.