Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 0 PID: 2775 at drivers/gpu/drm/i915/intel_pm.c:6317 intel_display_power_put+0x14c/0x160 [i915]()
Modules linked in: cdc_acm ccm rfcomm fuse xt_CHECKSUM ipt_MASQUERADE tun 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 x86_pkg_temp_thermal coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi crct10dif_pclmul arc4 snd_hda_intel snd_hda_controller iwlmvm crc32_pclmul snd_hda_codec mac80211 uvcvideo iwlwifi videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_hwdep crc32c_intel
 iTCO_wdt iTCO_vendor_support btusb ghash_clmulni_intel bluetooth cfg80211 dell_wmi sparse_keymap snd_seq snd_seq_device snd_pcm dell_laptop shpchp ie31200_edac edac_core dcdbas rfkill mei_me mei int3403_thermal i2c_i801 serio_raw lpc_ich mfd_core snd_timer snd soundcore nouveau i915 ttm i2c_algo_bit drm_kms_helper mxm_wmi drm r8169 mii video wmi
CPU: 0 PID: 2775 Comm: Xorg.bin Not tainted 3.17.1-304.fc21.x86_64 #1
Hardware name: Dell Inc. Inspiron 7447/0AM750, BIOS A00 06/23/2014
 0000000000000000 000000008a205a90 ffff880208b17c70 ffffffff8173dbb1
 0000000000000000 ffff880208b17ca8 ffffffff81096e8d ffff8802209e002c
 000000000000000b ffff8802209e8610 0000000000000001 ffff8802209e0000
Call Trace:
 [<ffffffff8173dbb1>] dump_stack+0x45/0x56
 [<ffffffff81096e8d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff81096fba>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa00cd33c>] intel_display_power_put+0x14c/0x160 [i915]
 [<ffffffffa0118db3>] intel_crtc_control+0x83/0x100 [i915]
 [<ffffffffa0118e97>] intel_crtc_update_dpms+0x67/0x80 [i915]
 [<ffffffffa0122059>] intel_connector_dpms+0x59/0x70 [i915]
 [<ffffffffa0045389>] drm_mode_obj_set_property_ioctl+0x399/0x3a0 [drm]
 [<ffffffffa00453cf>] drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm]
 [<ffffffffa0035e6f>] drm_ioctl+0x1df/0x680 [drm]
 [<ffffffff810c7428>] ? __enqueue_entity+0x78/0x80
 [<ffffffff810cd7db>] ? put_prev_entity+0x5b/0x400
 [<ffffffff8101f297>] ? __switch_to_xtra+0x167/0x1a0
 [<ffffffff812203a0>] do_vfs_ioctl+0x2d0/0x4b0
 [<ffffffff81220601>] SyS_ioctl+0x81/0xa0
 [<ffffffff8122281d>] ? SyS_poll+0x6d/0x120
 [<ffffffff81744d29>] system_call_fastpath+0x16/0x1b