Comment 6 for bug 1492764

Another me too with staktrace:

[drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[ 8.155674] ------------[ cut here ]------------
[ 8.155688] WARNING: CPU: 1 PID: 431 at /build/linux-4dBub_/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x2c5/0x440 [i915]()
[ 8.155689] pipe state doesn't match!
[ 8.155719] Modules linked in: vboxdrv(OE+) drbg ansi_cprng ctr ccm binfmt_misc bnep nls_iso8859_1 arc4 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth asus_nb_wmi(OE) asus_wmi(OE) sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlmvm aesni_intel mac80211 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_hdmi snd_soc_rt5640 snd_soc_rl6231 snd_soc_core snd_hda_codec_realtek snd_hda_codec_generic iwlwifi snd_compress ac97_bus snd_pcm_dmaengine joydev input_leds snd_hda_intel cfg80211 snd_hda_codec serio_raw lpc_ich snd_hda_core snd_hwdep snd_pcm mei_me snd_seq_midi mei snd_seq_midi_event shpchp snd_rawmidi snd_seq snd_seq_device
[ 8.155736] snd_timer snd dw_dmac dw_dmac_core processor_thermal_device int3400_thermal intel_smartconnect soundcore acpi_thermal_rel intel_soc_dts_iosf snd_soc_sst_acpi 8250_dw int3402_thermal i2c_designware_platform i2c_designware_core int340x_thermal_zone iosf_mbi spi_pxa2xx_platform mac_hid parport_pc ppdev lp parport autofs4 dm_mirror dm_region_hash dm_log hid_generic usbhid i915 psmouse i2c_algo_bit drm_kms_helper ahci drm libahci wmi sdhci_acpi video sdhci i2c_hid hid
[ 8.155738] CPU: 1 PID: 431 Comm: plymouthd Tainted: G U W OE 4.2.0-7-generic #7-Ubuntu
[ 8.155739] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.209 05/08/2014
[ 8.155741] ffffffffc02281e8 ffff880210d83538 ffffffff817b0465 0000000000000000
[ 8.155743] ffff880210d83588 ffff880210d83578 ffffffff81076536 ffff880210d835a8
[ 8.155745] ffff880210d83610 ffff880215365000 0000000000000001 ffff880215365350
[ 8.155745] Call Trace:
[ 8.155750] [<ffffffff817b0465>] dump_stack+0x45/0x57
[ 8.155753] [<ffffffff81076536>] warn_slowpath_common+0x86/0xc0
[ 8.155754] [<ffffffff810765b6>] warn_slowpath_fmt+0x46/0x50
[ 8.155768] [<ffffffffc01bc091>] ? intel_pipe_config_compare+0xb31/0xc60 [i915]
[ 8.155779] [<ffffffffc01bc485>] check_crtc_state+0x2c5/0x440 [i915]
[ 8.155793] [<ffffffffc01cff3e>] intel_modeset_check_state+0x20e/0x6b0 [i915]
[ 8.155805] [<ffffffffc01d10e7>] intel_crtc_set_config+0x4c7/0x580 [i915]
[ 8.155818] [<ffffffffc0082036>] drm_mode_set_config_internal+0x66/0x100 [drm]
[ 8.155823] [<ffffffffc01093b2>] restore_fbdev_mode+0xc2/0xf0 [drm_kms_helper]
[ 8.155828] [<ffffffffc010b239>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[ 8.155831] [<ffffffffc010b2a2>] drm_fb_helper_set_par+0x22/0x40 [drm_kms_helper]
[ 8.155844] [<ffffffffc01de28a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[ 8.155846] [<ffffffff810aaed2>] ? enqueue_task_fair+0x332/0x770
[ 8.155849] [<ffffffff81425f08>] fb_set_var+0x238/0x460
[ 8.155852] [<ffffffff81232187>] ? ep_poll_callback+0x137/0x180
[ 8.155854] [<ffffffff810b59f2>] ? __wake_up_common+0x52/0x90
[ 8.155856] [<ffffffff8141c6b9>] fbcon_blank+0x2e9/0x330
[ 8.155859] [<ffffffff814aceb3>] do_unblank_screen+0xd3/0x1a0
[ 8.155861] [<ffffffff814a26cb>] vt_ioctl+0x4fb/0x12c0
[ 8.155867] [<ffffffffc007739f>] ? drm_ioctl+0x15f/0x610 [drm]
[ 8.155869] [<ffffffff81495c0c>] tty_ioctl+0x3cc/0xbb0
[ 8.155872] [<ffffffff817b61e9>] ? schedule_hrtimeout_range_clock+0x19/0x40
[ 8.155874] [<ffffffff811fffd5>] do_vfs_ioctl+0x285/0x470
[ 8.155876] [<ffffffff8109f020>] ? wake_up_q+0x70/0x70
[ 8.155878] [<ffffffff81200239>] SyS_ioctl+0x79/0x90
[ 8.155880] [<ffffffff817b6cf2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 8.155881] ---[ end trace f1bfd0b28e93948a ]---