alessandro@alessandro-X550EP:~$ lsmod | grep radeon 
radeon               1522640  0 
ttm                    85150  1 radeon
drm_kms_helper         55071  1 radeon
drm                   303102  3 ttm,drm_kms_helper,radeon
i2c_algo_bit           13413  1 radeon
alessandro@alessandro-X550EP:~$