Issue occured again, was again playing video files with vlc (using newest 3.16 kernel from Ubuntu 14.04.2), external monitor (mirror) was connected.

 Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010849] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 41
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010853] Raw EDID:
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010855]  	00 ff ff ff ff ff ff 00 4d 29 35 91 01 00 00 00
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010857]  	18 10 01 03 80 50 2d 78 0a 0d c9 a0 57 47 98 27
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010858]  	12 40 7f ff ff ff ff ff ff ff ff ff ff ff ff ff
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010858]  	ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010859]  	ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010860]  	ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010861]  	ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Mar 13 22:45:16 ulrich-DX1704 kernel: [36687.010862]  	ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005028] ------------[ cut here ]------------
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005069] WARNING: CPU: 2 PID: 1409 at /build/buildd/linux-lts-utopic-3.16.0/drivers/gpu/drm/i915/intel_display.c:3324 intel_crtc_wait_for_pending_flips+0x171/0x180 [i915]()
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005070] Modules linked in: uas usb_storage ctr ccm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) rfcomm bnep dm_crypt binfmt_misc arc4 btusb bluetooth 6lowpan_iphc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd joydev serio_raw snd_hda_codec_via iwlmvm snd_hda_codec_hdmi snd_hda_codec_generic mac80211 lpc_ich rtsx_pci_ms memstick snd_hda_intel snd_hda_controller snd_hda_codec iwlwifi snd_hwdep snd_pcm cfg80211 snd_seq_midi mei_me snd_seq_midi_event mei snd_rawmidi snd_seq snd_seq_device snd_timer parport_pc ppdev tpm_infineon lp snd parport mac_hid shpchp soundcore hid_logitech_dj hid_generic usbhid hid rtsx_pci_sdmmc nouveau i915 mxm_wmi ttm i2c_algo_bit psmouse drm_kms_helper r8169 ahci drm rtsx_pci mii libahci video wmi
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005114] CPU: 2 PID: 1409 Comm: Xorg Tainted: G           OE 3.16.0-31-generic #43~14.04.1-Ubuntu
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005116] Hardware name: Notebook                         W35xSS_370SS              /W35xSS_370SS              , BIOS 4.6.5 04/08/2014
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005117]  0000000000000009 ffff8805f9be3ac0 ffffffff81762f10 0000000000000000
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005119]  ffff8805f9be3af8 ffffffff8106dd6d 0000000000000000 ffff88060dfbf000
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005121]  ffff8806079d8210 ffff88060d413800 ffff88060d413800 ffff8805f9be3b08
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005124] Call Trace:
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005130]  [<ffffffff81762f10>] dump_stack+0x45/0x56
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005135]  [<ffffffff8106dd6d>] warn_slowpath_common+0x7d/0xa0
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005138]  [<ffffffff8106de4a>] warn_slowpath_null+0x1a/0x20
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005154]  [<ffffffffc01e7c81>] intel_crtc_wait_for_pending_flips+0x171/0x180 [i915]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005158]  [<ffffffff810b4d10>] ? prepare_to_wait_event+0x100/0x100
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005171]  [<ffffffffc01ea733>] intel_crtc_disable_planes+0x33/0x1c0 [i915]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005184]  [<ffffffffc01eb625>] haswell_crtc_disable+0x55/0x2e0 [i915]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005197]  [<ffffffffc01ecec7>] __intel_set_mode+0x287/0xa90 [i915]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005210]  [<ffffffffc01f0566>] intel_set_mode+0x16/0x30 [i915]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005223]  [<ffffffffc01f149d>] intel_crtc_set_config+0x8ed/0xdb0 [i915]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005237]  [<ffffffffc0095401>] drm_mode_set_config_internal+0x61/0xe0 [drm]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005249]  [<ffffffffc0098e49>] drm_mode_setcrtc+0xd9/0x590 [drm]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005258]  [<ffffffffc00899ec>] drm_ioctl+0x1ec/0x660 [drm]
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005263]  [<ffffffff811e6d20>] do_vfs_ioctl+0x2e0/0x4c0
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005266]  [<ffffffff81648295>] ? __sys_recvmsg+0x65/0x80
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005268]  [<ffffffff811e6f81>] SyS_ioctl+0x81/0xa0
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005271]  [<ffffffff8176b66d>] system_call_fastpath+0x1a/0x1f
Mar 13 22:46:16 ulrich-DX1704 kernel: [36747.005273] ---[ end trace 52139194264f7a2c ]---
Mar 13 22:46:16 ulrich-DX1704 colord: device removed: xrandr-Silicon Image, Inc.-HDMI TV-1