[ltp] dual head ati 7500 t41

[alejo]

hi all, i ve been copy pasting xorg confs from here and there and
finally i got a dualhead working on the radeon 7500.

i have a wierd behaviour though..

glxgears create the window with the 3 sprockets but this image is only
seen or rendered when inside my laptop screen; when i drag it to the
second monitor, the CRT, it appears just as a black square box withouth
the rendered color sprockets?

why this? could anyone give me and idea.
is it related to a incompatibility between xinerama and xorg?

glxgears tell me this:
 root # glxinfo 
name of display: :0.0
display: :0  screen: 0
direct rendering: No
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_EXT_import_context, GLX_OML_swap_method,
GLX_SGI_make_current_read, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig
client glx vendor string: SGI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample,
GLX_EXT_import_context, 
    GLX_EXT_visual_info, GLX_EXT_visual_rating,
GLX_MESA_allocate_memory, 
    GLX_MESA_swap_control, GLX_MESA_swap_frame_usage,
GLX_OML_swap_method, 
    GLX_OML_sync_control, GLX_SGI_make_current_read,
GLX_SGI_swap_control, 
    GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group
GLX extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample,
GLX_EXT_import_context, 
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_OML_swap_method, 
    GLX_SGI_make_current_read, GLX_SGIS_multisample, GLX_SGIX_fbconfig
OpenGL vendor string: Mesa project: www.mesa3d.org
OpenGL renderer string: Mesa GLX Indirect
OpenGL version string: 1.2 (1.5 Mesa 6.1)
OpenGL extensions:
    GL_ARB_depth_texture, GL_ARB_imaging, GL_ARB_multitexture, 
    GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_shadow, 
    GL_ARB_shadow_ambient, GL_ARB_texture_border_clamp, 
    GL_ARB_texture_cube_map, GL_ARB_texture_env_add, 
    GL_ARB_texture_env_combine, GL_ARB_texture_env_crossbar, 
    GL_ARB_texture_env_dot3, GL_ARB_texture_mirrored_repeat, 
    GL_ARB_transpose_matrix, GL_ARB_window_pos, GL_EXT_abgr,
GL_EXT_bgra, 
    GL_EXT_blend_color, GL_EXT_blend_func_separate,
GL_EXT_blend_logic_op, 
    GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_clip_volume_hint,
    GL_EXT_copy_texture, GL_EXT_draw_range_elements, GL_EXT_fog_coord, 
    GL_EXT_multi_draw_arrays, GL_EXT_packed_pixels,
GL_EXT_point_parameters, 
    GL_EXT_polygon_offset, GL_EXT_rescale_normal,
GL_EXT_secondary_color, 
    GL_EXT_separate_specular_color, GL_EXT_shadow_funcs, 
    GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_subtexture, 
    GL_EXT_texture, GL_EXT_texture3D, GL_EXT_texture_edge_clamp, 
    GL_EXT_texture_env_add, GL_EXT_texture_env_combine, 
    GL_EXT_texture_env_dot3, GL_EXT_texture_lod_bias,
GL_EXT_texture_object, 
    GL_EXT_texture_rectangle, GL_EXT_vertex_array,
GL_APPLE_packed_pixels, 
    GL_ATI_texture_env_combine3, GL_ATI_texture_mirror_once, 
    GL_ATIX_texture_env_combine3, GL_IBM_texture_mirrored_repeat, 
 GL_INGR_blend_func_separate, GL_MESA_pack_invert,
GL_MESA_ycbcr_texture, 
    GL_NV_blend_square, GL_NV_point_sprite, GL_NV_texgen_reflection, 
    GL_NV_texture_rectangle, GL_SGIS_generate_mipmap, 
    GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp, 
    GL_SGIS_texture_lod, GL_SGIX_depth_texture, GL_SGIX_shadow, 
    GL_SGIX_shadow_ambient, GL_SUN_multi_draw_arrays
glu version: 1.3
glu extensions:
    GLU_EXT_nurbs_tessellator, GLU_EXT_object_space_tess

   visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav
 id dep cl sp sz l  ci b ro  r  g  b  a bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------
0x23 16 tc  0 16  0 r  y  .  5  6  5  0  0 16  0  0  0  0  0  0 0 None
0x24 16 tc  0 16  0 r  y  .  5  6  5  0  0 16  8 16 16 16  0  0 0 None
0x25 16 tc  0 24  0 r  y  .  5  6  5  8  0 16  8 16 16 16 16  0 0 None
0x26 16 tc  0 24  0 r  .  .  5  6  5  8  0 16  8 16 16 16 16  0 0 None
0x27 16 dc  0 16  0 r  y  .  5  6  5  0  0 16  0  0  0  0  0  0 0 None
0x28 16 dc  0 16  0 r  y  .  5  6  5  0  0 16  8 16 16 16  0  0 0 None
0x29 16 dc  0 24  0 r  y  .  5  6  5  8  0 16  8 16 16 16 16  0 0 None
0x2a 16 dc  0 24  0 r  .  .  5  6  5  8  0 16  8 16 16 16 16  0 0 None