Monitor is build up with white lines and between the lines parts of the monitor picture itself.
The fault is several times happen. I added to GPU crash dumps


May 16 15:01:35 ntpserver2 kernel: [   39.804041] [drm] stuck on render ring
May 16 15:01:35 ntpserver2 kernel: [   39.805800] [drm] GPU HANG: ecode 3:0:0x7ee6ffc1, in Xorg [1261], reason: Ring hung, action: reset
May 16 15:01:35 ntpserver2 kernel: [   39.805804] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
May 16 15:01:35 ntpserver2 kernel: [   39.805807] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
May 16 15:01:35 ntpserver2 kernel: [   39.805809] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
May 16 15:01:35 ntpserver2 kernel: [   39.805811] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
May 16 15:01:35 ntpserver2 kernel: [   39.805813] [drm] GPU crash dump saved to /sys/class/drm/card0/error
May 16 15:01:35 ntpserver2 kernel: [   39.805890] ------------[ cut here ]------------
May 16 15:01:35 ntpserver2 kernel: [   39.805980] WARNING: CPU: 0 PID: 6 at /build/linux-lts-wily-JounNn/linux-lts-wily-4.2.0/drivers/gpu/drm/i915/intel_display.c:3296 intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]()
May 16 15:01:35 ntpserver2 kernel: [   39.805985] WARN_ON(ret)
May 16 15:01:35 ntpserver2 kernel: [   39.805989] Modules linked in: gpio_ich rfcomm bnep bluetooth snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq serio_raw input_leds snd_seq_device snd_timer wmi lpc_ich snd 8250_fintek i915 soundcore shpchp video drm_kms_helper parport_pc mac_hid ppdev drm lp parport i2c_algo_bit hid_generic usbhid hid psmouse tg3 floppy pata_acpi ptp pps_core
May 16 15:01:35 ntpserver2 kernel: [   39.806058] CPU: 0 PID: 6 Comm: kworker/u4:0 Not tainted 4.2.0-35-generic #40~14.04.1-Ubuntu
May 16 15:01:35 ntpserver2 kernel: [   39.806064] Hardware name: Hewlett-Packard HP Compaq dc5100 MT(PW099ET)/09E0h, BIOS 786C2 v01.07 08/25/2005
May 16 15:01:35 ntpserver2 kernel: [   39.806131] Workqueue: i915-hangcheck i915_hangcheck_elapsed [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806137]  00000000 00000000 f4d25d54 c17105ae f4d25d94 f8d09bdc 00000ce0 f4d25d84
May 16 15:01:35 ntpserver2 kernel: [   39.806150]  c1067a47 f8d17c9c f4d25db0 00000006 f8d09bdc 00000ce0 f8cad438 f8cad438
May 16 15:01:35 ntpserver2 kernel: [   39.806163]  f10f0000 00000001 f4f7a034 f4d25d9c c1067ab3 00000009 f4d25d94 f8d17c9c
May 16 15:01:35 ntpserver2 kernel: [   39.806175] Call Trace:
May 16 15:01:35 ntpserver2 kernel: [   39.806189]  [<c17105ae>] dump_stack+0x59/0x74
May 16 15:01:35 ntpserver2 kernel: [   39.806200]  [<c1067a47>] warn_slowpath_common+0x87/0xc0
May 16 15:01:35 ntpserver2 kernel: [   39.806268]  [<f8cad438>] ? intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806336]  [<f8cad438>] ? intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806343]  [<c1067ab3>] warn_slowpath_fmt+0x33/0x40
May 16 15:01:35 ntpserver2 kernel: [   39.806411]  [<f8cad438>] intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806476]  [<f8a1ba1c>] ? drm_modeset_lock_all_crtcs+0x8c/0xa0 [drm]
May 16 15:01:35 ntpserver2 kernel: [   39.806549]  [<f8caecc7>] intel_crtc_disable_planes+0x37/0xf0 [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806620]  [<f8caee2a>] intel_prepare_reset+0x6a/0x80 [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806671]  [<f8c81f29>] i915_handle_error+0x259/0x6e0 [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806678]  [<c10b7f6e>] ? vprintk_emit+0x2de/0x540
May 16 15:01:35 ntpserver2 kernel: [   39.806683]  [<c10b8351>] ? vprintk_default+0x41/0x60
May 16 15:01:35 ntpserver2 kernel: [   39.806724]  [<f8c82653>] i915_hangcheck_elapsed+0x253/0x420 [i915]
May 16 15:01:35 ntpserver2 kernel: [   39.806730]  [<c107d7da>] process_one_work+0x11a/0x390
May 16 15:01:35 ntpserver2 kernel: [   39.806734]  [<c107de8d>] worker_thread+0xed/0x430
May 16 15:01:35 ntpserver2 kernel: [   39.806738]  [<c107dda0>] ? rescuer_thread+0x2b0/0x2b0
May 16 15:01:35 ntpserver2 kernel: [   39.806742]  [<c10825c1>] kthread+0xa1/0xc0
May 16 15:01:35 ntpserver2 kernel: [   39.806747]  [<c1716c01>] ret_from_kernel_thread+0x21/0x30
May 16 15:01:35 ntpserver2 kernel: [   39.806751]  [<c1082520>] ? kthread_create_on_node+0x140/0x140
May 16 15:01:35 ntpserver2 kernel: [   39.806757] ---[ end trace 688f220fd9428eb3 ]---
May 16 15:01:35 ntpserver2 kernel: [   39.838983] drm/i915: Resetting chip after gpu hang
May 16 15:01:35 ntpserver2 NetworkManager[734]: <info> (eth0): IP6 addrconf timed out or failed.




Here the second GPU crash damp

May 16 15:58:43 ntpserver2 kernel: [ 1869.988025] [drm] stuck on render ring
May 16 15:58:43 ntpserver2 kernel: [ 1869.989816] [drm] GPU HANG: ecode 3:0:0x017fffc1, in Xorg [1377], reason: Ring hung, action: reset
May 16 15:58:43 ntpserver2 kernel: [ 1869.989820] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
May 16 15:58:43 ntpserver2 kernel: [ 1869.989823] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
May 16 15:58:43 ntpserver2 kernel: [ 1869.989825] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
May 16 15:58:43 ntpserver2 kernel: [ 1869.989827] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
May 16 15:58:43 ntpserver2 kernel: [ 1869.989830] [drm] GPU crash dump saved to /sys/class/drm/card0/error
May 16 15:58:43 ntpserver2 kernel: [ 1869.989903] ------------[ cut here ]------------
May 16 15:58:43 ntpserver2 kernel: [ 1869.989982] WARNING: CPU: 1 PID: 2576 at /build/linux-lts-wily-JounNn/linux-lts-wily-4.2.0/drivers/gpu/drm/i915/intel_display.c:3296 intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]()
May 16 15:58:43 ntpserver2 kernel: [ 1869.989986] WARN_ON(ret)
May 16 15:58:43 ntpserver2 kernel: [ 1869.989990] Modules linked in: snd_intel8x0 i915 snd_ac97_codec input_leds ac97_bus snd_pcm snd_seq_midi snd_seq_midi_event bnep snd_rawmidi rfcomm snd_seq gpio_ich snd_seq_device snd_timer video bluetooth drm_kms_helper snd drm serio_raw soundcore lpc_ich wmi i2c_algo_bit 8250_fintek shpchp mac_hid parport_pc ppdev lp parport hid_generic usbhid hid psmouse floppy pata_acpi tg3 ptp pps_core
May 16 15:58:43 ntpserver2 kernel: [ 1869.990060] CPU: 1 PID: 2576 Comm: kworker/u4:2 Not tainted 4.2.0-35-generic #40~14.04.1-Ubuntu
May 16 15:58:43 ntpserver2 kernel: [ 1869.990065] Hardware name: Hewlett-Packard HP Compaq dc5100 MT(PW099ET)/09E0h, BIOS 786C2 v01.07 08/25/2005
May 16 15:58:43 ntpserver2 kernel: [ 1869.990133] Workqueue: i915-hangcheck i915_hangcheck_elapsed [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990140]  00000000 00000000 e12d7d54 c17105ae e12d7d94 f8badbdc 00000ce0 e12d7d84
May 16 15:58:43 ntpserver2 kernel: [ 1869.990154]  c1067a47 f8bbbc9c e12d7db0 00000a10 f8badbdc 00000ce0 f8b51438 f8b51438
May 16 15:58:43 ntpserver2 kernel: [ 1869.990166]  f3858000 00000001 f4208c34 e12d7d9c c1067ab3 00000009 e12d7d94 f8bbbc9c
May 16 15:58:43 ntpserver2 kernel: [ 1869.990179] Call Trace:
May 16 15:58:43 ntpserver2 kernel: [ 1869.990192]  [<c17105ae>] dump_stack+0x59/0x74
May 16 15:58:43 ntpserver2 kernel: [ 1869.990202]  [<c1067a47>] warn_slowpath_common+0x87/0xc0
May 16 15:58:43 ntpserver2 kernel: [ 1869.990271]  [<f8b51438>] ? intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990339]  [<f8b51438>] ? intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990346]  [<c1067ab3>] warn_slowpath_fmt+0x33/0x40
May 16 15:58:43 ntpserver2 kernel: [ 1869.990414]  [<f8b51438>] intel_crtc_wait_for_pending_flips+0x138/0x1f0 [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990477]  [<f8a36a1c>] ? drm_modeset_lock_all_crtcs+0x8c/0xa0 [drm]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990551]  [<f8b52cc7>] intel_crtc_disable_planes+0x37/0xf0 [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990622]  [<f8b52e2a>] intel_prepare_reset+0x6a/0x80 [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990672]  [<f8b25f29>] i915_handle_error+0x259/0x6e0 [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990680]  [<c10b7f6e>] ? vprintk_emit+0x2de/0x540
May 16 15:58:43 ntpserver2 kernel: [ 1869.990685]  [<c10b8351>] ? vprintk_default+0x41/0x60
May 16 15:58:43 ntpserver2 kernel: [ 1869.990725]  [<f8b26653>] i915_hangcheck_elapsed+0x253/0x420 [i915]
May 16 15:58:43 ntpserver2 kernel: [ 1869.990731]  [<c107d7da>] process_one_work+0x11a/0x390
May 16 15:58:43 ntpserver2 kernel: [ 1869.990735]  [<c107de8d>] worker_thread+0xed/0x430
May 16 15:58:43 ntpserver2 kernel: [ 1869.990739]  [<c107dda0>] ? rescuer_thread+0x2b0/0x2b0
May 16 15:58:43 ntpserver2 kernel: [ 1869.990743]  [<c10825c1>] kthread+0xa1/0xc0
May 16 15:58:43 ntpserver2 kernel: [ 1869.990748]  [<c1716c01>] ret_from_kernel_thread+0x21/0x30
May 16 15:58:43 ntpserver2 kernel: [ 1869.990752]  [<c1082520>] ? kthread_create_on_node+0x140/0x140
May 16 15:58:43 ntpserver2 kernel: [ 1869.990758] ---[ end trace 568156f1077cecac ]---
May 16 15:58:43 ntpserver2 kernel: [ 1870.032221] drm/i915: Resetting chip after gpu hang