Comment 15 for bug 1567417

Tuxedo Book BU 1505
I have black screen during 2 seconds and return. (external monitor 2K by HDMI)

Jun 14 15:22:29 tuxedo kernel: [23138.707940] ------------[ cut here ]------------
Jun 14 15:22:29 tuxedo kernel: [23138.708030] WARNING: CPU: 3 PID: 1260 at /build/linux-FvcHlK/linux-4.4.0/ubuntu/i915/intel_pm.c:3572 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
Jun 14 15:22:29 tuxedo kernel: [23138.708036] WARN_ON(!wm_changed)
Jun 14 15:22:29 tuxedo kernel: [23138.708040] Modules linked in: uas usb_storage rfcomm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) bnep vboxdrv(OE) snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic hid_logitech_hidpp uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev hid_generic media btusb btrtl joydev arc4 snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core intel_rapl x86_pkg_temp_thermal intel_powerclamp snd_compress coretemp ac97_bus snd_pcm_dmaengine kvm_intel binfmt_misc dw_dmac_core snd_hda_intel snd_hda_codec kvm snd_hda_core snd_hwdep nls_iso8859_1 irqbypass crct10dif_pclmul snd_pcm snd_seq_midi crc32_pclmul snd_seq_midi_event iwlmvm mac80211 snd_rawmidi aesni_intel aes_x86_64 lrw gf128mul snd_seq glue_helper ablk_helper iwlwifi cryptd snd_seq_device input_leds cfg80211 rtsx_pci_ms snd_timer memstick snd mei_me soundcore serio_raw shpchp mei hci_uart btbcm btqca btintel bluetooth intel_lpss_acpi intel_lpss acpi_pad mac_hid parport_pc ppdev lp parport autofs4 hid_logitech_dj usbhid rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper syscopyarea sysfillrect psmouse sysimgblt r8169 nvme fb_sys_fops mii ahci drm rtsx_pci libahci wmi video pinctrl_sunrisepoint pinctrl_intel i2c_hid hid fjes
Jun 14 15:22:29 tuxedo kernel: [23138.708256] CPU: 3 PID: 1260 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu
Jun 14 15:22:29 tuxedo kernel: [23138.708262] Hardware name: TUXEDO N24_25JU/N24_25JU, BIOS 5.11 03/31/2016
Jun 14 15:22:29 tuxedo kernel: [23138.708267] 0000000000000286 00000000e7e99c43 ffff88045f0b3938 ffffffff813e9c53
Jun 14 15:22:29 tuxedo kernel: [23138.708277] ffff88045f0b3980 ffffffffc02eec70 ffff88045f0b3970 ffffffff81080fb2
Jun 14 15:22:29 tuxedo kernel: [23138.708286] ffff88045b203000 ffff88045a199d9c ffff88045b204000 ffff88045a070b78
Jun 14 15:22:29 tuxedo kernel: [23138.708294] Call Trace:
Jun 14 15:22:29 tuxedo kernel: [23138.708311] [<ffffffff813e9c53>] dump_stack+0x63/0x90
Jun 14 15:22:29 tuxedo kernel: [23138.708324] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0
Jun 14 15:22:29 tuxedo kernel: [23138.708333] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80
Jun 14 15:22:29 tuxedo kernel: [23138.708392] [<ffffffffc02205cc>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
Jun 14 15:22:29 tuxedo kernel: [23138.708448] [<ffffffffc0220766>] skl_update_wm+0x186/0x5f0 [i915_bpo]
Jun 14 15:22:29 tuxedo kernel: [23138.708536] [<ffffffffc02ac36f>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo]
Jun 14 15:22:29 tuxedo kernel: [23138.708593] [<ffffffffc022448e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
Jun 14 15:22:29 tuxedo kernel: [23138.708676] [<ffffffffc0290401>] haswell_crtc_enable+0x321/0x8c0 [i915_bpo]
Jun 14 15:22:29 tuxedo kernel: [23138.708758] [<ffffffffc028cdad>] intel_atomic_commit+0x5dd/0xdb0 [i915_bpo]
Jun 14 15:22:29 tuxedo kernel: [23138.708820] [<ffffffffc00a480e>] ? drm_atomic_check_only+0x18e/0x590 [drm]
Jun 14 15:22:29 tuxedo kernel: [23138.708872] [<ffffffffc00a4c47>] drm_atomic_commit+0x37/0x60 [drm]
Jun 14 15:22:29 tuxedo kernel: [23138.708900] [<ffffffffc01e99f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
Jun 14 15:22:29 tuxedo kernel: [23138.708948] [<ffffffffc0093e02>] drm_mode_set_config_internal+0x62/0x100 [drm]
Jun 14 15:22:29 tuxedo kernel: [23138.708998] [<ffffffffc0098322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm]
Jun 14 15:22:29 tuxedo kernel: [23138.709033] [<ffffffffc0089712>] drm_ioctl+0x152/0x540 [drm]
Jun 14 15:22:29 tuxedo kernel: [23138.709078] [<ffffffffc0097f50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
Jun 14 15:22:29 tuxedo kernel: [23138.709089] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490
Jun 14 15:22:29 tuxedo kernel: [23138.709101] [<ffffffff8120eee1>] ? __sb_end_write+0x21/0x30
Jun 14 15:22:29 tuxedo kernel: [23138.709110] [<ffffffff8120caed>] ? vfs_write+0x15d/0x1a0
Jun 14 15:22:29 tuxedo kernel: [23138.709118] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90
Jun 14 15:22:29 tuxedo kernel: [23138.709131] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71
Jun 14 15:22:29 tuxedo kernel: [23138.709230] ---[ end trace b619cc5fe41ad139 ]---