Lots of debug output from Radeon driver

configname: CONFIG_FB_RADEON_DEBUG

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Frame buffer Devices
└─>Lots of debug output from Radeon driver
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say Y here if you want the Radeon driver to output all sorts
of debugging information to provide to the maintainer when
something goes wrong.