System setup:

OS: Fedora-19
GFX: ATI
kernel: Linux malibu.XXXX.com 3.11.3-201.fc19.x86_64 #1 SMP Thu Oct 3 00:47:03 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux



Trace:
Oct  8 20:59:27 malibu kernel: [56515.220579] ------------[ cut here ]------------
Oct  8 20:59:27 malibu kernel: [56515.220603] WARNING: CPU: 4 PID: 364 at drivers/gpu/drm/drm_crtc.c:1992 drm_mode_set_config_internal+0xd6/0xe0 [drm]()
Oct  8 20:59:27 malibu kernel: [56515.220615] Modules linked in: ebtable_nat xt_CHECKSUM fuse tun bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_nat nf_nat_ipv
6 ip6table_mangle ip6table_security ip6table_raw ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle iptable_security iptable_raw nf_conntrack_ipv4 nf_defrag_i
pv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables rfcomm bnep vsock snd_hda_codec_hdmi snd_hda_codec_idt iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal coretemp kvm
_intel kvm crc32_pclmul crc32c_intel hp_wmi ghash_clmulni_intel sparse_keymap ppdev arc4 iwldvm btusb mac80211 microcode joydev uvcvideo bluetooth videobuf2_vmalloc videobuf2_memops snd_hda_intel vi
deobuf2_core snd_hda_codec videodev iwlwifi snd_hwdep serio_raw snd_seq cfg80211 media sdhci_pci sdhci snd_seq_device mmc_core rfkill snd_pcm lpc_ich e1000e snd_page_alloc mfd_core snd_timer snd ptp
 mei_me soundcore mei pps_core shpchp wmi parport_pc tpm_tis parport tpm_infineon tpm tpm_bios hp_accel lis3lv02d video input_polldev mperf binfmt_misc uinput radeon i2c_algo_bit drm_kms_helper ttm 
firewire_ohci drm firewire_core crc_itu_t i2c_core
Oct  8 20:59:27 malibu kernel: [56515.220626] CPU: 4 PID: 364 Comm: Xorg Tainted: G        W    3.11.3-201.fc19.x86_64 #1
Oct  8 20:59:27 malibu kernel: [56515.220626] Hardware name: Hewlett-Packard HP EliteBook 8470w/179B, BIOS 68ICF Ver. F.32 12/05/2012
Oct  8 20:59:27 malibu kernel: [56515.220628]  0000000000000009 ffff88035e7fdae0 ffffffff8164777f 0000000000000000
Oct  8 20:59:27 malibu kernel: [56515.220630]  ffff88035e7fdb18 ffffffff8106715d ffff8804246184a0 0000000000000000
Oct  8 20:59:27 malibu kernel: [56515.220631]  ffff8804277fe000 ffff880424319860 0000000000000080 ffff88035e7fdb28
Oct  8 20:59:27 malibu kernel: [56515.220631] Call Trace:
Oct  8 20:59:27 malibu kernel: [56515.220636]  [<ffffffff8164777f>] dump_stack+0x45/0x56
Oct  8 20:59:27 malibu kernel: [56515.220638]  [<ffffffff8106715d>] warn_slowpath_common+0x7d/0xa0
Oct  8 20:59:27 malibu kernel: [56515.220639]  [<ffffffff8106723a>] warn_slowpath_null+0x1a/0x20
Oct  8 20:59:27 malibu kernel: [56515.220646]  [<ffffffffa003fae6>] drm_mode_set_config_internal+0xd6/0xe0 [drm]
Oct  8 20:59:27 malibu kernel: [56515.220649]  [<ffffffffa00ab641>] drm_fb_helper_set_par+0x71/0xf0 [drm_kms_helper]
Oct  8 20:59:27 malibu kernel: [56515.220652]  [<ffffffff813457b1>] fb_set_var+0x191/0x430
Oct  8 20:59:27 malibu kernel: [56515.220655]  [<ffffffff81144606>] ? free_hot_cold_page_list+0x46/0xa0
Oct  8 20:59:27 malibu kernel: [56515.220657]  [<ffffffff81350f81>] fbcon_blank+0x1d1/0x2d0
Oct  8 20:59:27 malibu kernel: [56515.220658]  [<ffffffff813c68f4>] do_unblank_screen+0xb4/0x1e0
Oct  8 20:59:27 malibu kernel: [56515.220660]  [<ffffffff813bd973>] vt_ioctl+0x10d3/0x1150
Oct  8 20:59:27 malibu kernel: [56515.220662]  [<ffffffff81646e5b>] ? avc_compute_av+0x1a3/0x1b5
Oct  8 20:59:27 malibu kernel: [56515.220663]  [<ffffffff813b1695>] tty_ioctl+0x275/0xb70
Oct  8 20:59:27 malibu kernel: [56515.220665]  [<ffffffff8129a269>] ? avc_has_perm_flags+0xc9/0x180
Oct  8 20:59:27 malibu kernel: [56515.220668]  [<ffffffff811b9f4d>] do_vfs_ioctl+0x2dd/0x4b0
Oct  8 20:59:27 malibu kernel: [56515.220670]  [<ffffffff811a9d6e>] ? ____fput+0xe/0x10
Oct  8 20:59:27 malibu kernel: [56515.220671]  [<ffffffff811ba1a1>] SyS_ioctl+0x81/0xa0
Oct  8 20:59:27 malibu kernel: [56515.220673]  [<ffffffff81656959>] system_call_fastpath+0x16/0x1b
Oct  8 20:59:27 malibu kernel: [56515.220674] ---[ end trace 0e5b42bab49a2c03 ]---
Oct  8 20:59:27 malibu kernel: [56515.239621] ------------[ cut here ]------------