Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 3 PID: 859 at drivers/gpu/drm/i915/intel_display.c:1234 assert_cursor.constprop.78+0x9b/0xa0 [i915]()
cursor on pipe A assertion failure (expected off, current on)
Modules linked in: ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute 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 hid_lenovo fuse ccm bridge stp llc bnep dell_wmi sparse_keymap iTCO_wdt ppdev iTCO_vendor_support ath3k btusb x86_pkg_temp_thermal bluetooth coretemp uvcvideo arc4 kvm_intel videobuf2_vmalloc videobuf2_memops videobuf2_core kvm v4l2_common dell_laptop videodev dcdbas media ath9k crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel ath9k_common ath9k_hw microcode ath snd_hda_codec_hdmi mac80211 joydev snd_hda_codec_idt snd_hda_codec_generic
 serio_raw snd_hda_intel snd_hda_controller cfg80211 snd_hda_codec sdhci_pci snd_hwdep sdhci snd_seq snd_seq_device rfkill mmc_core snd_pcm snd_timer snd mei_me mei lpc_ich i2c_i801 soundcore mfd_core shpchp wmi parport_pc parport binfmt_misc i915 i2c_algo_bit drm_kms_helper e1000e drm ptp pps_core i2ccore video [last unloaded: iptable_raw]
CPU: 3 PID: 859 Comm: Xorg.bin Not tainted 3.17.0-0.rc1.git3.1.fc22.x86_64 #1
Hardware name: Dell Inc. Latitude 6430U/0JCV3H, BIOS A08 06/20/2014
 0000000000000000 000000002d89b1e8 ffff8801feb33a30 ffffffff81823910
 ffff8801feb33a78 ffff8801feb33a68 ffffffff810a114d 0000000000000000
 0000000000000000 0000000000000000 ffff88020e6d4000 ffff880035c10000
Call Trace:
 [<ffffffff81823910>] dump_stack+0x4d/0x66
 [<ffffffff810a114d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff810a11cc>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa014b3ab>] assert_cursor.constprop.78+0x9b/0xa0 [i915]
 [<ffffffffa014dbd9>] intel_enable_pipe+0x49/0x200 [i915]
 [<ffffffffa0155b50>] ironlake_crtc_enable+0x3b0/0xe80 [i915]
 [<ffffffffa0151d0a>] __intel_set_mode+0x88a/0x1700 [i915]
 [<ffffffffa015a6a6>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa015b86d>] intel_crtc_set_config+0xaad/0xed0 [i915]
 [<ffffffffa003f357>] drm_mode_set_config_internal+0x67/0xf0 [drm]
 [<ffffffffa0043e0b>] drm_mode_setcrtc+0x2ab/0x5b0 [drm][03]
 [<ffffffffa003537f>] drm_ioctl+0x1df/0x6a0 [drm]
 [<ffffffff8137ca51>] ? inode_has_perm.isra.48+0x51/0x90[03]
 [<ffffffff8126ebe0>] do_vfs_ioctl+0x2f0/0x520
 [<ffffffff8127b1d5>] ? __fget+0x5/0x2f0[03]
 [<ffffffff8126ee91>] SyS_ioctl+0x81/0xa0
 [<ffffffff81168a9c>] ? __audit_syscall_entry+0x9c/0xf0
 [<ffffffff8182d769>] system_call_fastpath+0x16/0x1b