| Summary: | glxgears in Xorg trunk does not operate smoothly with Solaris's OpenGL 1.3 implementation | ||
|---|---|---|---|
| Product: | xorg | Reporter: | Roland Mainz <roland.mainz> |
| Component: | App/other | Assignee: | Xorg Project Team <xorg-team> |
| Status: | RESOLVED NOTABUG | QA Contact: | |
| Severity: | critical | ||
| Priority: | high | CC: | amir.bukhari, stuart.kreitman |
| Version: | git | ||
| Hardware: | SPARC | ||
| OS: | Solaris | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
(In reply to comment #0) > glxgears 2004-11-08-trunk jumps with Solaris OpenGL 1.3 implementation and is > pretty much unuseable, the gears move forth and back and are far far away from > rotating smoothly... ;-( Is vsync on? Are you using the smooth rotation patch? Depending on the framerate and the vertical retrace rate, it's not unheard of for glxgears to appear to be standing still, or rotating backwards. This is not a bug, the r200 and fglrx drivers show the same behaviour. This is the same effect as watching car wheels spinning on TV. As the car speeds up they look to be rotating forward, then slowing down, then standing still, then rotating backwards. Time domain aliasing. Note that the SPARC graphics group that produces Sun's OpenGL implementation does not provide a hardware-accelerated GL pipeline for the m64, only the software implementation. (For those not familiar with SPARC graphics, m64 was Sun's low end 2-D board in previous generation machines, based on ATI Rage II chipset in early models and Rage XL chipset in later ones.) If you want smooth, usable OpenGL output, use a board with hardware acceleration. so if this is a bug in sun's opengl, then it doesn't belong here. if it's a bug in glxgears, it's still not a bug, since gears is not expected to rotate smoothly but rather to update as fast as possible, which may create aliasing when not synced to vblank. |
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glxgears 2004-11-08-trunk jumps with Solaris OpenGL 1.3 implementation and is pretty much unuseable, the gears move forth and back and are far far away from rotating smoothly... ;-( Same problem can be observed with other GL applications on the same kind of hardware (m64) - on the same machine with Linux+Mesa (indirect rendering) almost smooth operation can be reached. Sounds pretty much like a problem in Sun's OpenGL implementation. glxinfo output: -- snip -- % (DISPLAY=:0.0 LD_LIBRARY_PATH=$PWD/../../exports/lib/ ./glxinfo) name of display: :0.0 display: :0 screen: 0 direct rendering: No server glx vendor string: Sun Microsystems, Inc. server glx version string: 1.4 Sun OpenGL 1.3 patch 113886-20 for Solaris server glx extensions: GLX_SUN_get_transparent_index, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGI_make_current_read, GLX_ARB_multisample, GLX_EXT_visual_info 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_SGI_make_current_read, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer OpenGL vendor string: Sun Microsystems, Inc. OpenGL renderer string: SUNWm64 mmap software renderer, VIS OpenGL version string: 1.2 (1.3 Sun OpenGL 1.3 patch 113886-20 for Solaris) OpenGL extensions: GL_ARB_imaging, GL_ARB_multitexture, GL_ARB_point_parameters, GL_ARB_texture_border_clamp, GL_ARB_texture_cube_map, GL_ARB_texture_env_add, GL_ARB_texture_env_combine, GL_ARB_texture_env_dot3, GL_ARB_transpose_matrix, GL_EXT_abgr, GL_EXT_blend_color, GL_EXT_blend_logic_op, GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_draw_range_elements, GL_EXT_multi_draw_arrays, GL_EXT_point_parameters, GL_EXT_polygon_offset, GL_EXT_rescale_normal, GL_EXT_texture3D, GL_EXT_texture_env_add, GL_EXT_texture_env_combine, GL_EXT_texture_filter_anisotropic, GL_HP_convolution_border_modes, GL_SGIS_texture_border_clamp, GL_SGIX_texture_lod_bias, GL_SGIX_texture_scale_bias, GL_SUN_convolution_border_modes, GL_SUN_multi_draw_arrays glu version: 1.3 Sun OpenGL 1.3 for Solaris 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 8 pc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None 0x24 8 sc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None 0x25 8 sg 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None 0x26 8 gs 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None 0x27 8 dc 1 0 0 c . . 0 0 0 0 0 0 0 0 0 0 0 0 0 None 0x28 24 tc 0 24 0 r y . 8 8 8 0 0 32 8 16 16 16 16 1 0 None -- snip --