Also maybe worth noting that I'm using Kubuntu.

my syslog get following entries when the lockup happens:

Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405831] ------------[ cut here ]------------
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405879] WARNING: CPU: 0 PID: 1602 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_display.c:3324
 intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]()
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405881] Modules linked in: asix usbnet mii hid_logitech_dj hid_generic xt_CHECKSUM iptable_mangle ipt_MAS
QUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tabl
es bridge stp llc ctr ccm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) joydev intel_rapl arc4 x86_pkg_temp_thermal hid_rmi intel_pow
erclamp coretemp dell_wmi sparse_keymap kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel dell_laptop uvcvideo dcdbas videobuf2_vmalloc 
videobuf2_memops videobuf2_core v4l2_common aesni_intel videodev aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd hid_multitouch media iwlmvm sn
d_soc_rt5640 snd_soc_rl6231 snd_soc_core mac80211 snd_compress snd_pcm_dmaengine btusb snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic 
iwlwifi serio_raw snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep cfg80211 snd_pcm mei_me mei shpchp lpc_ich snd_seq_midi snd_seq_midi_event 
snd_rawmidi snd_seq snd_seq_device snd_timer snd rfcomm soundcore dw_dmac snd_soc_sst_acpi bnep i2c_hid dw_dmac_core i2c_designware_platform 8250_dw i
2c_designware_core spi_pxa2xx_platform intel_smartconnect bluetooth 6lowpan_iphc mac_hid binfmt_misc parport_pc ppdev i8k lp parport usbhid hid i915 i
2c_algo_bit drm_kms_helper psmouse ahci drm libahci wmi sdhci_acpi sdhci video
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405952] CPU: 0 PID: 1602 Comm: Xorg Tainted: G           OE 3.16.0-23-generic #31-Ubuntu
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405954] Hardware name: Dell Inc. XPS13 9333/0D13CR, BIOS A04 03/19/2014
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405955]  0000000000000009 ffff8800bd587c18 ffffffff8177fcbc 0000000000000000
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405959]  ffff8800bd587c50 ffffffff8106fd8d 0000000000000000 ffff880213e74000
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405961]  ffff880210718210 ffff880210ae5000 ffff880210ae5000 ffff8800bd587c60
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405965] Call Trace:
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405973]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405979]  [<ffffffff8106fd8d>] warn_slowpath_common+0x7d/0xa0
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.405982]  [<ffffffff8106fe6a>] warn_slowpath_null+0x1a/0x20
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406004]  [<ffffffffc01e8ffc>] intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406010]  [<ffffffff810b9590>] ? prepare_to_wait_event+0x100/0x100
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406029]  [<ffffffffc01ebac3>] intel_crtc_disable_planes+0x33/0x1c0 [i915]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406032]  [<ffffffff81784e5b>] ? __ww_mutex_lock+0x1b/0xb0
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406050]  [<ffffffffc01eca17>] haswell_crtc_disable+0x57/0x2e0 [i915]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406053]  [<ffffffff81785ab2>] ? mutex_lock+0x12/0x30
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406072]  [<ffffffffc01ed457>] intel_crtc_update_dpms+0x67/0xa0 [i915]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406091]  [<ffffffffc01f1ac9>] intel_connector_dpms+0x59/0x70 [i915]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406110]  [<ffffffffc0119e19>] drm_mode_obj_set_property_ioctl+0x399/0x3a0 [drm]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406125]  [<ffffffffc0119e50>] drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406137]  [<ffffffffc0108a4f>] drm_ioctl+0x1df/0x680 [drm]
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406143]  [<ffffffff811f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406146]  [<ffffffff811e31a1>] ? __sb_end_write+0x31/0x60
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406149]  [<ffffffff811f4e21>] SyS_ioctl+0x81/0xa0
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406152]  [<ffffffff81787ced>] system_call_fastpath+0x1a/0x1f
Oct 27 10:47:12 jkekkonen-XPS kernel: [20998.406154] ---[ end trace fa8daa4bcece2f9f ]---