Comment 18 for bug 1098561

The shell script in the workaround failed here. The awk command produced a \x5b that sed choked on. So, I tweaked the awk script to bracket its output as sed character classes; that let the script finish, but I wound up with a corrupt fglrx_drv.so and had to drop into recovery mode, uninstall fglrx, then boot in to low graphics mode and reinstall it.

However, the thread in http://ubuntuforums.org/archive/index.php/t-2074962.html led me to a workaround that did succeed. I grabbed the /etc/ati/control from a 12.10 install that was running on the same system, copied that to the 13.04 system, and the watermark is gone.