If I run 3D OpenGL based applications in full-screen mode it causes Xorg to hang (including the default screen saver). Once it hangs I cannot go to tty1 to restart GDM or to retrieve logs. I ran ioUrbanTerror and it crashed with x still intact. The screen size was very low, luckily "xrandr -s 0" restored it. I received "drmRadeonCmdBuffer: -12. Kernel failed to parse or rejected command stream. See dmesg for more info" in the terminal". Hardware: CPU: AMD Athlon(tm) XP 2800+ MemTotal: 508280 kB Motherboard: Abit KV7 Host bridge: VIA Technologies, Inc. VT8377 [KT400/KT600 AGP] Host Bridge (rev 80) PCI bridge: VIA Technologies, Inc. VT8237/VX700 PCI Bridge ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [KT600/K8T800/K8T890 South] VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 SE] (rev 01) Running Xubuntu 9.10 had more or less the same problems with 2.6.31-20-generic-pae, 2.6.31-19-generic-pae and 2.6.31-14-generic-pae. Sometimes it will also crash if the OpenGL apps run in windowed mode, but it is very inconsistent. dmesg: [112642.813133] glxinfo:7305 freeing invalid memtype e0102000-e0112000 [112642.813145] glxinfo:7305 freeing invalid memtype e0112000-e0122000 [112642.813154] glxinfo:7305 freeing invalid memtype e0122000-e0132000 [112642.813162] glxinfo:7305 freeing invalid memtype e0132000-e0142000 [112642.813170] glxinfo:7305 freeing invalid memtype e0142000-e0152000 [112642.813180] glxinfo:7305 freeing invalid memtype e0152000-e0162000 [112642.813188] glxinfo:7305 freeing invalid memtype e0162000-e0172000 [112642.813196] glxinfo:7305 freeing invalid memtype e0172000-e0182000 [112642.813205] glxinfo:7305 freeing invalid memtype e0182000-e0192000 [112642.813213] glxinfo:7305 freeing invalid memtype e0192000-e01a2000 [112642.813221] glxinfo:7305 freeing invalid memtype e01a2000-e01b2000 [112642.813229] glxinfo:7305 freeing invalid memtype e01b2000-e01c2000 [112642.813237] glxinfo:7305 freeing invalid memtype e01c2000-e01d2000 [112642.813245] glxinfo:7305 freeing invalid memtype e01d2000-e01e2000 [112642.813253] glxinfo:7305 freeing invalid memtype e01e2000-e01f2000 [112642.813262] glxinfo:7305 freeing invalid memtype e01f2000-e0202000 [112642.813270] glxinfo:7305 freeing invalid memtype e0202000-e0212000 [112642.813278] glxinfo:7305 freeing invalid memtype e0212000-e0222000 [112642.813286] glxinfo:7305 freeing invalid memtype e0222000-e0232000 [112642.813294] glxinfo:7305 freeing invalid memtype e0232000-e0242000 [112642.813302] glxinfo:7305 freeing invalid memtype e0242000-e0252000 [112642.813311] glxinfo:7305 freeing invalid memtype e0252000-e0262000 [112642.813319] glxinfo:7305 freeing invalid memtype e0262000-e0272000 [112642.813327] glxinfo:7305 freeing invalid memtype e0272000-e0282000 [112642.813335] glxinfo:7305 freeing invalid memtype e0282000-e0292000 [112642.813343] glxinfo:7305 freeing invalid memtype e0292000-e02a2000 [112642.813352] glxinfo:7305 freeing invalid memtype e02a2000-e02b2000 [112642.813360] glxinfo:7305 freeing invalid memtype e02b2000-e02c2000 [112642.813368] glxinfo:7305 freeing invalid memtype e02c2000-e02d2000 [112642.813376] glxinfo:7305 freeing invalid memtype e02d2000-e02e2000 [112642.813384] glxinfo:7305 freeing invalid memtype e02e2000-e02f2000 [112642.813392] glxinfo:7305 freeing invalid memtype e02f2000-e0302000 [112654.931987] glxinfo:7308 freeing invalid memtype e0102000-e0112000 [112654.932037] glxinfo:7308 freeing invalid memtype e0112000-e0122000 [112654.932047] glxinfo:7308 freeing invalid memtype e0122000-e0132000 [112654.932056] glxinfo:7308 freeing invalid memtype e0132000-e0142000 [112654.932065] glxinfo:7308 freeing invalid memtype e0142000-e0152000 [112654.932073] glxinfo:7308 freeing invalid memtype e0152000-e0162000 [112654.932082] glxinfo:7308 freeing invalid memtype e0162000-e0172000 [112654.932090] glxinfo:7308 freeing invalid memtype e0172000-e0182000 [112654.932098] glxinfo:7308 freeing invalid memtype e0182000-e0192000 [112654.932107] glxinfo:7308 freeing invalid memtype e0192000-e01a2000 [112654.932115] glxinfo:7308 freeing invalid memtype e01a2000-e01b2000 [112654.932125] glxinfo:7308 freeing invalid memtype e01b2000-e01c2000 [112654.932133] glxinfo:7308 freeing invalid memtype e01c2000-e01d2000 [112654.932141] glxinfo:7308 freeing invalid memtype e01d2000-e01e2000 [112654.932149] glxinfo:7308 freeing invalid memtype e01e2000-e01f2000 [112654.932158] glxinfo:7308 freeing invalid memtype e01f2000-e0202000 [112654.932166] glxinfo:7308 freeing invalid memtype e0202000-e0212000 [112654.932174] glxinfo:7308 freeing invalid memtype e0212000-e0222000 [112654.932182] glxinfo:7308 freeing invalid memtype e0222000-e0232000 [112654.932191] glxinfo:7308 freeing invalid memtype e0232000-e0242000 [112654.932199] glxinfo:7308 freeing invalid memtype e0242000-e0252000 [112654.932207] glxinfo:7308 freeing invalid memtype e0252000-e0262000 [112654.932215] glxinfo:7308 freeing invalid memtype e0262000-e0272000 [112654.932224] glxinfo:7308 freeing invalid memtype e0272000-e0282000 [112654.932232] glxinfo:7308 freeing invalid memtype e0282000-e0292000 [112654.932240] glxinfo:7308 freeing invalid memtype e0292000-e02a2000 [112654.932248] glxinfo:7308 freeing invalid memtype e02a2000-e02b2000 [112654.932257] glxinfo:7308 freeing invalid memtype e02b2000-e02c2000 [112654.932265] glxinfo:7308 freeing invalid memtype e02c2000-e02d2000 [112654.932273] glxinfo:7308 freeing invalid memtype e02d2000-e02e2000 [112654.932281] glxinfo:7308 freeing invalid memtype e02e2000-e02f2000 [112654.932289] glxinfo:7308 freeing invalid memtype e02f2000-e0302000 [112823.872066] ioUrbanTerror.i: page allocation failure. order:4, mode:0x40d0 [112823.872075] Pid: 7345, comm: ioUrbanTerror.i Not tainted 2.6.31-19-generic-pae #56-Ubuntu [112823.872079] Call Trace: [112823.872093] [] ? printk+0x18/0x1a [112823.872103] [] __alloc_pages_slowpath+0x340/0x480 [112823.872108] [] __alloc_pages_nodemask+0x10f/0x120 [112823.872112] [] __get_free_pages+0x17/0x30 [112823.872120] [] __kmalloc+0xdf/0x180 [112823.872127] [] ? default_spin_lock_flags+0x8/0x10 [112823.872197] [] radeon_cp_cmdbuf+0xa98/0xbf0 [radeon] [112823.872240] [] ? drm_lock+0x252/0x350 [drm] [112823.872256] [] drm_ioctl+0x180/0x360 [drm] [112823.872274] [] ? radeon_cp_cmdbuf+0x0/0xbf0 [radeon] [112823.872280] [] ? do_swap_page+0x30b/0x530 [112823.872284] [] ? handle_mm_fault+0x397/0x4a0 [112823.872291] [] vfs_ioctl+0x73/0x90 [112823.872295] [] do_vfs_ioctl+0x71/0x310 [112823.872302] [] ? do_page_fault+0x19b/0x380 [112823.872306] [] sys_ioctl+0x5f/0x80 [112823.872311] [] syscall_call+0x7/0xb [112823.872314] Mem-Info: [112823.872316] DMA per-cpu: [112823.872319] CPU 0: hi: 0, btch: 1 usd: 0 [112823.872321] Normal per-cpu: [112823.872323] CPU 0: hi: 186, btch: 31 usd: 0 [112823.872328] Active_anon:52446 active_file:2377 inactive_anon:55479 [112823.872330] inactive_file:4951 unevictable:0 dirty:18 writeback:719 unstable:0 [112823.872331] free:1513 slab:3407 mapped:4829 pagetables:2123 bounce:0 [112823.872337] DMA free:2048kB min:84kB low:104kB high:124kB active_anon:2576kB inactive_anon:2680kB active_file:420kB inactive_file:704kB unevictable:0kB present:15804kB pages_scanned:0 all_unreclaimable? no [112823.872342] lowmem_reserve[]: 0 491 491 491 [112823.872349] Normal free:4004kB min:2792kB low:3488kB high:4188kB active_anon:207208kB inactive_anon:219236kB active_file:9088kB inactive_file:19100kB unevictable:0kB present:502856kB pages_scanned:0 all_unreclaimable? no [112823.872353] lowmem_reserve[]: 0 0 0 0 [112823.872357] DMA: 6*4kB 4*8kB 5*16kB 2*32kB 3*64kB 1*128kB 2*256kB 2*512kB 0*1024kB 0*2048kB 0*4096kB = 2056kB [112823.872367] Normal: 793*4kB 38*8kB 15*16kB 3*32kB 3*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 4004kB [112823.872377] 16505 total pagecache pages [112823.872379] 6890 pages in swap cache [112823.872381] Swap cache stats: add 77798, delete 70908, find 65279/71352 [112823.872384] Free swap = 1864780kB [112823.872386] Total swap = 1975952kB [112823.878709] 130784 pages RAM [112823.878712] 0 pages HighMem [112823.878714] 3747 pages reserved [112823.878715] 30573 pages shared [112823.878717] 114204 pages non-shared glxinfo 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_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_allocate_memory, GLX_MESA_copy_sub_buffer, GLX_MESA_swap_control, GLX_MESA_swap_frame_usage, GLX_OML_swap_method, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_visual_select_group OpenGL vendor string: Tungsten Graphics, Inc. OpenGL renderer string: Mesa DRI R200 (RV280 5964) 20090101 AGP 4x x86/MMX+/3DNow!+/SSE TCL OpenGL version string: 1.3 Mesa 7.6 OpenGL extensions: GL_ARB_draw_buffers, GL_ARB_imaging, GL_ARB_multisample, GL_ARB_multitexture, GL_ARB_point_parameters, GL_ARB_point_sprite, 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_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_fog_coord, 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_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_vertex_array, GL_APPLE_packed_pixels, GL_ATI_blend_equation_separate, GL_ATI_texture_env_combine3, GL_ATI_texture_mirror_once, GL_ATI_fragment_shader, 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_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 8 GLX Visuals 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 ---------------------------------------------------------------------- 0x21 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x22 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x6a 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x6b 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x6c 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x6d 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x6e 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x61 32 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 Ncon 8 GLXFBConfigs: 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 ---------------------------------------------------------------------- 0x62 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x63 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x64 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x65 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x66 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x67 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow 0x68 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None 0x69 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 Slow