Additional info:
reporter:       libreport-2.2.3
kernel BUG at drivers/gpu/drm/drm_crtc.c:536!
invalid opcode: 0000 [#1] SMP 
Modules linked in: ccm rfcomm fuse bnep 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 binfmt_misc arc4 iwldvm mac80211 btusb bluetooth iwlwifi cfg80211 snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm iTCO_wdt iTCO_vendor_support cdc_acm hid_logitech_hidpp dell_wmi dell_laptop intel_rapl iosf_mbi x86_pkg_temp_thermal coretemp kvm_intel kvm uvcvideo videobuf2_vmalloc videobuf2_core videobuf2_memops
v4l2_common hid_logitech_dj ppdev videodev lpc_ich sparse_keymap dcdbas i8k snd_timer snd joydev media serio_raw i2c_i801 mfd_core rfkill crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel soundcore sdhci_pci sdhci mmc_core mei_me parport_pc e1000e shpchp ptp pps_core mei parport dell_smo8800 nouveau i915 mxm_wmi ttm firewire_ohci i2c_algo_bit firewire_core drm_kms_helper crc_itu_t drm wmi video
CPU: 3 PID: 1359 Comm: Xorg Not tainted 3.19.3-100.fc20.x86_64 #1
Hardware name: Dell Inc. Precision M4700/082H3V, BIOS A09 05/20/2013
task: ffff8800c08dd730 ti: ffff880222518000 task.ti: ffff880222518000
RIP: 0010:[<ffffffffa0026189>]  [<ffffffffa0026189>] drm_framebuffer_free_bug+0x9/0x10 [drm]
RSP: 0018:ffff88022251b9c8  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880036d23800 RCX: 0000000000000000
RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffff880221afb548
RBP: ffff88022251b9c8 R08: ffff8800bb5f4170 R09: 0000000000000000
R10: ffffffffa003723e R11: 0000000000003246 R12: ffff880221afb540
R13: ffff8800c968eb78 R14: ffff880036ce0000 R15: 0000000000000080
FS:  00007fb6f2ba99c0(0000) GS:ffff88022e380000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000157b1d8 CR3: 00000002237d9000 CR4: 00000000001407e0
Stack:
ffff88022251b9e8 ffffffffa00277f5 ffff880036d23800 ffff8800c968e800
ffff88022251ba28 ffffffffa0087811 0000000000000007 ffff880036ce0000
ffff8802245cd800 ffff8800c968e800 ffff8802245cd860 0000000000000080
Call Trace:
[<ffffffffa00277f5>] drm_plane_force_disable+0xa5/0xd0 [drm]
[<ffffffffa0087811>] restore_fbdev_mode+0x51/0xf0 [drm_kms_helper]
[<ffffffffa00897a9>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
[<ffffffffa0089822>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
[<ffffffffa0179d0a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[<ffffffff813aed45>] ? __percpu_counter_add+0x55/0x70
[<ffffffff813fde57>] fb_set_var+0x197/0x440
[<ffffffff811b0e38>] ? shmem_recalc_inode+0x78/0xa0
[<ffffffff811b3712>] ? shmem_undo_range+0x372/0x6b0
[<ffffffff81208a55>] ? swap_cgroup_record+0x55/0x80
[<ffffffff813f4624>] fbcon_blank+0x1f4/0x2f0
[<ffffffff81477d38>] do_unblank_screen+0xb8/0x1f0
[<ffffffff8146eabe>] vt_ioctl+0x110e/0x1190
[<ffffffff81759383>] ? __slab_free+0x11c/0x28b
[<ffffffff81461388>] tty_ioctl+0x208/0xc50
[<ffffffff814afdcc>] ? vga_arb_release+0xcc/0x120
[<ffffffff81225448>] do_vfs_ioctl+0x2f8/0x4f0
[<ffffffff8113b234>] ? __audit_syscall_entry+0xb4/0x110
[<ffffffff81022cbc>] ? do_audit_syscall_entry+0x6c/0x70
[<ffffffff812256c1>] SyS_ioctl+0x81/0xa0
[<ffffffff81762389>] system_call_fastpath+0x12/0x17
Code: e1 48 89 df e8 69 d4 1c e1 48 83 c4 08 5b 41 5c 41 5d 5d c3 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 <0f> 0b 0f 1f 44 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 
RIP  [<ffffffffa0026189>] drm_framebuffer_free_bug+0x9/0x10 [drm]
RSP <ffff88022251b9c8>

Potential duplicate: bug 1205449