(II) RADEON(0): [agp] GART texture map handle = 0xb0302000
(II) RADEON(0): [agp] GART Texture map mapped at 0xb51da000
(II) RADEON(0): Using 8 MB GART aperture
(II) RADEON(0): Using 5 MB for GART textures
(II) RADEON(0): [drm] Initialized kernel GART heap manager, 5111808
this is my Xorg.0.log
(II) RADEON(0): [agp] GART texture map handle = 0xb0302000
(II) RADEON(0): [agp] GART Texture map mapped at 0xb51da000
(II) RADEON(0): Using 8 MB GART aperture
(II) RADEON(0): Using 5 MB for GART textures
(II) RADEON(0): [drm] Initialized kernel GART heap manager, 5111808