Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 1 PID: 1209 at drivers/gpu/drm/i915/intel_pm.c:6312 intel_display_power_put+0x14c/0x160 [i915]()
Modules linked in: pn544_mei mei_phy pn544 hci nfc vfat fat rfcomm fuse ccm rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd sunrpc fscache nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw bnep arc4 x86_pkg_temp_thermal iTCO_wdt coretemp iTCO_vendor_support snd_hda_codec_realtek dell_wmi snd_hda_codec_generic snd_hda_codec_hdmi sparse_keymap kvm_intel ppdev kvm snd_hda_intel snd_hda_controller iwlmvm snd_hda_codec uvcvideo snd_hwdep
 dell_laptop dcdbas mac80211 snd_seq crct10dif_pclmul crc32_pclmul snd_seq_device videobuf2_vmalloc crc32c_intel videobuf2_memops videobuf2_core snd_pcm ghash_clmulni_intel v4l2_common videodev btusb media bluetooth iwlwifi joydev cfg80211 lpc_ich mfd_core serio_raw i2c_i801 sdhci_pci rfkill tpm_tis tpm wmi parport_pc mei_me parport snd_timer dell_smo8800 dw_dmac mei snd i2c_hid dw_dmac_core i2c_designware_platform i2c_designware_core soundcore shpchp binfmt_misc i915 i2c_algo_bit drm_kms_helper drm e1000e ptp pps_core sdhci_acpi sdhci mmc_core video uas usb_storage
CPU: 1 PID: 1209 Comm: Xorg.bin Not tainted 3.17.7-300.fc21.x86_64 #1
Hardware name: Dell Inc. Latitude E7440/07F3F4, BIOS A10 06/26/2014
 0000000000000000 00000000a9d64a34 ffff8800cbadbc70 ffffffff817401ea
 0000000000000000 ffff8800cbadbca8 ffffffff810970bd ffff880210f8002c
 000000000000000b ffff880210f88610 0000000000000001 ffff880210f80000
Call Trace:
 [<ffffffff817401ea>] dump_stack+0x45/0x56
 [<ffffffff810970bd>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff810971ea>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa01362ec>] intel_display_power_put+0x14c/0x160 [i915]
 [<ffffffffa0181e03>] intel_crtc_control+0x83/0x100 [i915]
 [<ffffffffa0181ee7>] intel_crtc_update_dpms+0x67/0x80 [i915]
 [<ffffffffa018b0a9>] intel_connector_dpms+0x59/0x70 [i915]
 [<ffffffffa00c5389>] drm_mode_obj_set_property_ioctl+0x399/0x3a0 [drm]
 [<ffffffffa00c53cf>] drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm]
 [<ffffffffa00b5e6f>] drm_ioctl+0x1df/0x680 [drm]
 [<ffffffff810c7668>] ? __enqueue_entity+0x78/0x80
 [<ffffffff810cda1b>] ? put_prev_entity+0x5b/0x400
 [<ffffffff8101f3d7>] ? __switch_to_xtra+0x167/0x1a0
 [<ffffffff81220ff0>] do_vfs_ioctl+0x2d0/0x4b0
 [<ffffffff81221251>] SyS_ioctl+0x81/0xa0
 [<ffffffff81135d96>] ? __audit_syscall_exit+0x1f6/0x2a0
 [<ffffffff817473a9>] system_call_fastpath+0x16/0x1b