Description of problem:
I worked in Firefox (web site had got flash content).

Additional info:
reporter:       libreport-2.5.0
WARNING: CPU: 2 PID: 0 at drivers/gpu/drm/i915/intel_display.c:9756 intel_check_page_flip+0xdb/0xf0 [i915]()
Kicking stuck page flip: queued at 93307, now 93321
Modules linked in: cpufreq_stats fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun 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 bnep snd_hda_codec_hdmi snd_hda_codec_realtek arc4 snd_hda_codec_generic uvcvideo ath9k snd_hda_intel videobuf2_vmalloc intel_rapl snd_hda_controller vfat videobuf2_core ath3k videobuf2_memops btusb bluetooth snd_intel_sst_acpi v4l2_common coretemp asus_nb_wmi videodev asus_wmi snd_intel_sst_core
 kvm_intel snd_soc_sst_mfld_platform sparse_keymap ath9k_common fat snd_hda_codec ath9k_hw media kvm snd_soc_core hid_multitouch ath snd_compress snd_hwdep snd_pcm_dmaengine mac80211 crct10dif_pclmul snd_seq crc32_pclmul snd_seq_device snd_pcm crc32c_intel ghash_clmulni_intel snd_timer iTCO_wdt iTCO_vendor_support cfg80211 snd rtsx_pci_ms memstick rfkill serio_raw iosf_mbi soundcore snd_soc_sst_acpi wmi shpchp mei_txe i2c_i801 mei lpc_ich nfsd auth_rpcgss nfs_acl lockd grace sunrpc binfmt_misc i915 rtsx_pci_sdmmc i2c_algo_bit 8021q drm_kms_helper mmc_core garp stp llc mrp drm r8169 mii rtsx_pci mfd_core video
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.0.0-0.rc5.git4.1.fc22.x86_64 #1
Hardware name: ASUSTeK COMPUTER INC. X200MA/X200MA, BIOS X200MA.504 11/13/2014
 0000000000000000 cfb0f561147079c2 ffff88013fd03ce8 ffffffff8178207a
 0000000000000000 ffff88013fd03d40 ffff88013fd03d28 ffffffff8109b82a
 ffff88013fd03d58 ffff88003f069800 ffff88003f8bd000 0000000000000000
Call Trace:
 <IRQ>  [<ffffffff8178207a>] dump_stack+0x45/0x57
 [<ffffffff8109b82a>] warn_slowpath_common+0x8a/0xc0
 [<ffffffff8109b8b5>] warn_slowpath_fmt+0x55/0x70
 [<ffffffffa018e1ab>] intel_check_page_flip+0xdb/0xf0 [i915]
 [<ffffffffa01560c8>] valleyview_pipestat_irq_handler+0x208/0x220 [i915]
 [<ffffffffa015b701>] valleyview_irq_handler+0xc1/0x170 [i915]
 [<ffffffff810f3e67>] handle_irq_event_percpu+0x77/0x1a0
 [<ffffffff810f3fcb>] handle_irq_event+0x3b/0x60
 [<ffffffff810f71ee>] handle_edge_irq+0x6e/0x120
 [<ffffffff81016514>] handle_irq+0x74/0x140
 [<ffffffff810bb6ba>] ? atomic_notifier_call_chain+0x1a/0x20
 [<ffffffff8178b29f>] do_IRQ+0x4f/0xf0
 [<ffffffff81788fed>] common_interrupt+0x6d/0x6d
 <EOI>  [<ffffffff816185fd>] ? cpuidle_enter_state+0x5d/0x170
 [<ffffffff816185ed>] ? cpuidle_enter_state+0x4d/0x170
 [<ffffffff81618747>] cpuidle_enter+0x17/0x20
 [<ffffffff810debe4>] cpu_startup_entry+0x314/0x430
 [<ffffffff8111269c>] ? clockevents_register_device+0xbc/0x130
 [<ffffffff8104a8c5>] start_secondary+0x1a5/0x1f0

Potential duplicate: bug 1206935