Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 1 PID: 21705 at drivers/gpu/drm/drm_irq.c:1130 drm_wait_one_vblank+0xcd/0x1a0 [drm]()
vblank wait timed out on crtc 0
Modules linked in: bnep bluetooth rfkill 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 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 iTCO_wdt gpio_ich iTCO_vendor_support ppdev coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq lpc_ich mfd_core snd_seq_device serio_raw snd_pcm asus_atk0110 parport_pc snd_timer shpchp parport snd soundcore
 acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc binfmt_misc uas usb_storage raid1 i915 i2c_algo_bit video drm_kms_helper drm ata_generic pata_acpi atl1e
CPU: 1 PID: 21705 Comm: Xorg.bin Not tainted 3.19.4-200.fc21.x86_64 #1
Hardware name: System manufacturer System Product Name/P5QPL-AM, BIOS 0317    09/21/2009
 0000000000000000 00000000879ea375 ffff8800d73cfb18 ffffffff8176e845
 0000000000000000 ffff8800d73cfb70 ffff8800d73cfb58 ffffffff8109bc1a
 ffff8800d73cfbb8 0000000000000000 ffff880119cb0000 0000000000000000
Call Trace:
 [<ffffffff8176e845>] dump_stack+0x45/0x57
 [<ffffffff8109bc1a>] warn_slowpath_common+0x8a/0xc0
 [<ffffffff8109bca5>] warn_slowpath_fmt+0x55/0x70
 [<ffffffff81100c30>] ? internal_add_timer+0xb0/0xb0
 [<ffffffff810dd8a3>] ? finish_wait+0x53/0x70
 [<ffffffffa002886d>] drm_wait_one_vblank+0xcd/0x1a0 [drm]
 [<ffffffff810dda20>] ? wait_woken+0x90/0x90
 [<ffffffffa010a797>] i9xx_crtc_disable+0x67/0x470 [i915]
 [<ffffffffa010c619>] intel_crtc_control+0x59/0x120 [i915]
 [<ffffffffa010c741>] intel_crtc_update_dpms+0x61/0x70 [i915]
 [<ffffffffa012572a>] intel_crt_dpms+0x6a/0xb0 [i915]
 [<ffffffffa0030199>] ? drm_mode_object_find+0x29/0x60 [drm]
 [<ffffffffa0036c59>] drm_mode_obj_set_property_ioctl+0x369/0x370 [drm]
 [<ffffffffa0036c9f>] drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm]
 [<ffffffffa0026a9f>] drm_ioctl+0x1df/0x680 [drm]
 [<ffffffff81063bca>] ? __do_page_fault+0x21a/0x5b0
 [<ffffffff8122e348>] do_vfs_ioctl+0x2f8/0x500
 [<ffffffff810a8071>] ? __set_task_blocked+0x41/0xa0
 [<ffffffff8113dba4>] ? __audit_syscall_entry+0xb4/0x110
 [<ffffffff81022dfc>] ? do_audit_syscall_entry+0x6c/0x70
 [<ffffffff8122e5d1>] SyS_ioctl+0x81/0xa0
 [<ffffffff81775049>] system_call_fastpath+0x12/0x17