abrt version: 2.0.3
architecture:   x86_64
cmdline:        ro root=/dev/mapper/vg_ace-lv_root rd_LVM_LV=vg_ace/lv_root rd_LVM_LV=vg_ace/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
component:      kernel
kernel:         2.6.38.8-35.fc15.x86_64
kernel_tainted: 512
kernel_tainted_long: Taint on warning.
os_release:     Fedora release 15 (Lovelock)
package:        kernel
reason:         WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:269 radeon_fence_wait+0x2a8/0x325 [radeon]()
time:           Mon Jul 18 23:50:58 2011

backtrace:
:WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:269 radeon_fence_wait+0x2a8/0x325 [radeon]()
:Hardware name:         
:GPU lockup (waiting for 0x00192230 last fence id 0x0019222F)
:Modules linked in: fuse 8021q garp stp llc rfcomm ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables sco bnep l2cap snd_hda_codec_hdmi snd_hda_codec_realtek xc5000 tuner au8522 snd_usb_audio snd_usbmidi_lib snd_rawmidi au0828 dvb_core videobuf_vmalloc videobuf_core tveeprom v4l2_common joydev videodev v4l2_compat_ioctl32 snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm microcode i2c_i801 btusb serio_raw iTCO_wdt iTCO_vendor_support bluetooth rfkill e1000e snd_timer snd soundcore snd_page_alloc ipv6 pata_acpi ata_generic firewire_ohci firewire_core crc_itu_t pata_marvell video radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: speedstep_lib]
:Pid: 1065, comm: Xorg Not tainted 2.6.38.8-35.fc15.x86_64 #1
:Call Trace:
: [<ffffffff8105511a>] warn_slowpath_common+0x83/0x9b
: [<ffffffff810551d5>] warn_slowpath_fmt+0x46/0x48
: [<ffffffffa00c5117>] ? r600_gpu_is_lockup+0xbd/0xc6 [radeon]
: [<ffffffffa009fdff>] radeon_fence_wait+0x2a8/0x325 [radeon]
: [<ffffffff8106f26e>] ? autoremove_wake_function+0x0/0x3d
: [<ffffffffa00a03b9>] radeon_sync_obj_wait+0x11/0x13 [radeon]
: [<ffffffffa00655da>] ttm_bo_wait+0xbf/0x17a [ttm]
: [<ffffffffa0066002>] ? ttm_bo_list_ref_sub+0x29/0x2b [ttm]
: [<ffffffffa00b006b>] radeon_bo_wait+0x7b/0x9f [radeon]
: [<ffffffffa00b05dd>] radeon_gem_wait_idle_ioctl+0x3d/0x74 [radeon]
: [<ffffffffa0019861>] drm_ioctl+0x29e/0x37b [drm]
: [<ffffffff811eb0f7>] ? inode_has_perm+0x76/0x8c
: [<ffffffffa00b05a0>] ? radeon_gem_wait_idle_ioctl+0x0/0x74 [radeon]
: [<ffffffff8104127e>] ? should_resched+0xe/0x2d
: [<ffffffff81063331>] ? recalc_sigpending+0x79/0x7e
: [<ffffffff811eb1b1>] ? file_has_perm+0xa4/0xc6
: [<ffffffff8112f3ac>] do_vfs_ioctl+0x47e/0x4bf
: [<ffffffff8109fc99>] ? audit_syscall_exit+0x12d/0x148
: [<ffffffff8112f443>] sys_ioctl+0x56/0x7b
: [<ffffffff81009e75>] ? int_check_syscall_exit_work+0x34/0x3d
: [<ffffffff81009bc2>] system_call_fastpath+0x16/0x1b

comment:
:I am unsure how the problem occurred or how it can be reproduced. I was using Gnome Shell 3.0.2 and 
:using SMPlayer, which was playing ATSC digital television.