abrt version: 2.0.3
architecture:   x86_64
cmdline:        ro root=/dev/mapper/VG_morn-LV_F15_slash rd_LVM_LV=VG_morn/LV_F15_slash rd_MD_UUID=069d0769:f77d3514:f82e2d0a:01499cc4 rd_LVM_LV=VG_morn/LV_swap rd_NO_LUKS rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb crashkernel=128M
component:      kernel
kernel:         2.6.40.6-0.fc15.x86_64
kernel_tainted: 512
kernel_tainted_long: Taint on warning.
os_release:     Fedora release 15 (Lovelock)
package:        kernel
reason:         [372253.778063] WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:267 radeon_fence_wait+0x296/0x33d [radeon]()
time:           Wed Oct 26 13:14:21 2011

backtrace:
:[372253.778063] WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:267 radeon_fence_wait+0x296/0x33d [radeon]()
:[372253.778066] Hardware name: P5Q-PRO
:[372253.778068] GPU lockup (waiting for 0x0402FAC5 last fence id 0x0402FAC4)
:[372253.778071] Modules linked in: tcp_lp sha256_generic dm_crypt vfat fat usb_storage uas nfs lockd fscache auth_rpcgss nfs_acl fuse ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle ppdev parport_pc lp parport sunrpc cpufreq_ondemand acpi_cpufreq mperf bridge stp llc rfcomm bnep nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ts_kmp nf_conntrack_amanda ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek snd_usb_audio snd_usbmidi_lib snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_pcm snd_rawmidi btusb bluetooth snd_seq_device snd_timer iTCO_wdt snd iTCO_vendor_support rfkill snd_page_alloc soundcore joydev i2c_i801 atl1e serio_raw asus_atk0110 microcode virtio_net kvm_intel kvm ipv6 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 firewire_ohci ata_generic pata_acpi firewire_core crc_itu_t pata_ma
:rvell radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan]
:[372253.778144] Pid: 2110, comm: Xorg Not tainted 2.6.40.6-0.fc15.x86_64 #1
:[372253.778147] Call Trace:
:[372253.778156]  [<ffffffff81054d0e>] warn_slowpath_common+0x83/0x9b
:[372253.778160]  [<ffffffff81054dc9>] warn_slowpath_fmt+0x46/0x48
:[372253.778187]  [<ffffffffa00beea1>] ? r600_gpu_is_lockup+0xbd/0xc6 [radeon]
:[372253.778208]  [<ffffffffa0098ddd>] radeon_fence_wait+0x296/0x33d [radeon]
:[372253.778213]  [<ffffffff8107064a>] ? remove_wait_queue+0x3a/0x3a
:[372253.778238]  [<ffffffffa00aa958>] radeon_ib_get+0xf1/0x178 [radeon]
:[372253.778263]  [<ffffffffa00abd9d>] radeon_cs_ioctl+0x99/0x19b [radeon]
:[372253.778277]  [<ffffffffa00157ff>] drm_ioctl+0x29e/0x37b [drm]
:[372253.778302]  [<ffffffffa00abd04>] ? radeon_cs_finish_pages+0x8e/0x8e [radeon]
:[372253.778308]  [<ffffffff811f68e8>] ? inode_has_perm+0x32/0x34
:[372253.778311]  [<ffffffff811f6991>] ? file_has_perm+0xa7/0xc9
:[372253.778316]  [<ffffffff811350de>] do_vfs_ioctl+0x460/0x4a1
:[372253.778319]  [<ffffffff81135175>] sys_ioctl+0x56/0x79
:[372253.778325]  [<ffffffff8148ed02>] system_call_fastpath+0x16/0x1b

comment:
:unsure, I just saw that now in ABRT.
:CLOSE the bug if nothing useful in backtrace