glxgears performance on f11 2.6.30 kernel & 2.6.31 (f12 alpha)

[planetf1]

I've noticed recently that glxgears performance on a V5200 (mobility 
M52, similar to X1400) radeon card has dropped from ~1300-1500 FPS to 
~600 FPS on
  - Fedora 11 with 2.6.30 kernel
  - Fedora 12 alpha
  - Fedora 12 alpha + rawhide

This occurs with & without an xorg.conf (with just EXA enabled)

There are no errors being reported in Xorg.0.log

Is this expected/known or should I open up a bugzilla?

glxinfo is:
name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
     GLX_ARB_multisample, GLX_EXT_import_context, 
GLX_EXT_texture_from_pixmap,
     GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
     GLX_OML_swap_method, GLX_SGI_make_current_read, GLX_SGI_swap_control,
     GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
     GLX_SGIX_visual_select_group
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_copy_sub_buffer, 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_EXT_texture_from_pixmap
GLX version: 1.2
GLX extensions:
     GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
     GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
     GLX_MESA_swap_frame_usage, GLX_OML_swap_method, 
GLX_SGI_make_current_read,
     GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig,
     GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group,
     GLX_EXT_texture_from_pixmap
OpenGL vendor string: DRI R300 Project
OpenGL renderer string: Mesa DRI R300 (RV530 71C4) 20090101  TCL DRI2
OpenGL version string: 1.4 Mesa 7.6-devel
OpenGL extensions:
     GL_ARB_depth_texture, GL_ARB_draw_buffers, GL_ARB_fragment_program,
     GL_ARB_imaging, GL_ARB_multisample, GL_ARB_multitexture,
     GL_ARB_point_parameters, GL_ARB_shadow, GL_ARB_shadow_ambient,
     GL_ARB_texture_border_clamp, GL_ARB_texture_compression,
     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_MESAX_texture_float,
     GL_ARB_texture_mirrored_repeat, GL_ARB_texture_rectangle,
     GL_ARB_transpose_matrix, GL_ARB_vertex_buffer_object,
     GL_ARB_vertex_program, GL_ARB_window_pos, GL_EXT_abgr, GL_EXT_bgra,
     GL_EXT_blend_color, GL_EXT_blend_equation_separate,
     GL_EXT_blend_func_separate, GL_EXT_blend_logic_op, 
GL_EXT_blend_minmax,
     GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array, 
GL_EXT_convolution,
     GL_EXT_copy_texture, GL_EXT_draw_range_elements,
     GL_EXT_framebuffer_object, GL_EXT_fog_coord,
     GL_EXT_gpu_program_parameters, GL_EXT_histogram, 
GL_EXT_multi_draw_arrays,
     GL_EXT_packed_depth_stencil, 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_filter_anisotropic, GL_EXT_texture_lod_bias,
     GL_EXT_texture_mirror_clamp, GL_EXT_texture_object,
     GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, GL_EXT_vertex_array,
     GL_EXT_vertex_array_bgra, GL_APPLE_packed_pixels,
     GL_ATI_blend_equation_separate, GL_ATI_texture_env_combine3,
     GL_ATI_texture_mirror_once, GL_ATI_separate_stencil,
     GL_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip,
     GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate,
     GL_MESA_pack_invert, GL_MESA_ycbcr_texture, GL_MESA_window_pos,
     GL_NV_blend_square, GL_NV_light_max_exponent, GL_NV_texture_rectangle,
     GL_NV_texgen_reflection, GL_NV_vertex_program, GL_OES_read_format,
     GL_SGI_color_matrix, GL_SGI_color_table, GL_SGIS_generate_mipmap,
     GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp,
     GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays

[jonesn at snowdon ~]$ glxgears
3488 frames in 5.0 seconds = 697.563 FPS
3076 frames in 5.0 seconds = 615.084 FPS
3104 frames in 5.0 seconds = 620.795 FPS
^C


Thanks
Nigel.
bugs at cherrybyte.me.uk