Description of problem:
Using GNOME Shell 3.16.4 and GDM with 
Linux HP_17 4.2.6-200.fc22.x86_64 #1 SMP Tue Nov 10 16:45:19 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

This occurs about 2/3 of the time that the screen blanks due to the "Blank Screen" setting in the Gnome settings.  I usually hit the Shift key to wake up the screen and I immediately know that the OS is unresponsive as the clock on the Screen save is not incrementing.  If I wait about 30 seconds the screen blanks again and on the when I unblank the screen again with the Shift key then I am able to resume the session.  Same things occurs if I use the Mouse to wake up the system.

This has been occuring frequently but I was unable to report the bug as I had VM Player installed and apparently this taints the kernel.  I uninstalled VM Player specifically for the purpose of being able to report this bug.

Additional info:
reporter:       libreport-2.6.3
WARNING: CPU: 0 PID: 1850 at drivers/gpu/drm/i915/intel_display.c:3918 intel_crtc_wait_for_pending_flips+0x1c6/0x230 [i915]()
WARN_ON(wait_event_timeout(dev_priv->pending_flip_queue, !intel_crtc_has_pending_flip(crtc), 60*HZ) == 0)
Modules linked in:
 xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun fuse nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge 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 arc4 intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm iTCO_wdt vfat iwlmvm iTCO_vendor_support fat crct10dif_pclmul crc32_pclmul mac80211 uvcvideo hp_wmi crc32c_intel sparse_keymap videobuf2_vmalloc videobuf2_core videobuf2_memops iwlwifi v4l2_common videodev snd_soc_rt286 snd_hda_codec_realtek snd_hda_codec_hdmi snd_soc_rl6347a
 snd_hda_codec_generic snd_soc_core cfg80211 media snd_hda_intel snd_compress snd_hda_codec snd_pcm_dmaengine ac97_bus snd_hda_core i2c_i801 snd_hwdep snd_seq lpc_ich mei_me rfkill snd_seq_device mei shpchp snd_pcm processor_thermal_device snd_timer tpm_crb dw_dmac snd int3402_thermal int3403_thermal dw_dmac_core tpm intel_soc_dts_iosf i2c_designware_platform int3400_thermal soundcore snd_soc_sst_acpi hp_wireless i2c_designware_core iosf_mbi acpi_pad acpi_thermal_rel int340x_thermal_zone nfsd auth_rpcgss nfs_acl lockd grace sunrpc binfmt_misc i915 i2c_algo_bit drm_kms_helper 8021q garp drm stp llc mrp r8169 serio_raw mii sdhci_acpi sdhci mmc_core video i2c_hid wmi
CPU: 0 PID: 1850 Comm: Xorg Not tainted 4.2.6-200.fc22.x86_64 #1
Hardware name: Hewlett-Packard HP ENVY Notebook/80DE, BIOS F.04 06/01/2015
 0000000000000000 00000000f62622fc ffff880448693b18 ffffffff817729ea
 0000000000000000 ffff880448693b70 ffff880448693b58 ffffffff8109e4b6
 ffff880448693cc0 0000000000000000 ffff880447848d38 ffff8804479e3000
Call Trace:
 [<ffffffff817729ea>] dump_stack+0x45/0x57
 [<ffffffff8109e4b6>] warn_slowpath_common+0x86/0xc0
 [<ffffffff8109e545>] warn_slowpath_fmt+0x55/0x70
 [<ffffffff810df6d3>] ? finish_wait+0x53/0x70
 [<ffffffffa019b986>] intel_crtc_wait_for_pending_flips+0x1c6/0x230 [i915]
 [<ffffffff810df990>] ? wake_atomic_t_function+0x70/0x70
 [<ffffffffa019cd32>] intel_crtc_disable_planes+0x32/0x100 [i915]
 [<ffffffffa019ec5b>] intel_crtc_control+0x4b/0x110 [i915]
 [<ffffffffa019ed7e>] intel_crtc_update_dpms+0x5e/0x80 [i915]
 [<ffffffffa01a41ef>] intel_connector_dpms+0x5f/0x70 [i915]
 [<ffffffffa009c7ab>] drm_mode_obj_set_property_ioctl+0x25b/0x270 [drm]
 [<ffffffffa009c7ff>] drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm]
 [<ffffffffa008c365>] drm_ioctl+0x125/0x610 [drm]
 [<ffffffffa009c7c0>] ? drm_mode_obj_set_property_ioctl+0x270/0x270 [drm]
 [<ffffffff813a4bd9>] ? timerqueue_add+0x59/0xb0
 [<ffffffff81108024>] ? enqueue_hrtimer+0x44/0x80
 [<ffffffff81778e3e>] ? _raw_spin_unlock_irqrestore+0xe/0x10
 [<ffffffff81108abf>] ? hrtimer_start_range_ns+0x1bf/0x3b0
 [<ffffffff81231445>] do_vfs_ioctl+0x295/0x470
 [<ffffffff816463fc>] ? __sys_recvmsg+0x8c/0xa0
 [<ffffffff81231699>] SyS_ioctl+0x79/0x90
 [<ffffffff817793ee>] entry_SYSCALL_64_fastpath+0x12/0x71