https://bugs.freedesktop.org/show_bug.cgi?id=58659
--- Comment #17 from Jerome Glisse glisse@freedesktop.org --- You also need step 12 of and please add :
printk(KERN_INFO "TITITOTOTUTUPOPO\n");
to
radeon_device.c line 992 after DRM_INFO("initializing ke ....
And when testing to make sure you are using the patched module dmesg | grep TITITOTO
should tell you if it's the case.