[i915_bpo] Intermittent display outage with external monitor

Filing on behalf of Claire Newman...

I seem to be tickling a bug in the i915 stack, when I use a desktop monitor. The symptom is that the screen blanks for a few seconds then comes back . This happens every few minutes. I am using a Lenovo Thinkpad T460s (new this weekend) but last week I was using a Thinkpad W550s - same issue with the blank screen on both laptops. Happens every 20 mins or so and there is no identifiable reproducer (eg. I cam just be sitting there doing something else on my phone and the screen goes black).

Here is lspci output for the video card:

00:02.0 VGA compatible controller: Intel Corporation Sky Lake Integrated Graphics (rev 07) (prog-if 00 [VGA controller])
    Subsystem: Lenovo Skylake Integrated Graphics
    Flags: bus master, fast devsel, latency 0, IRQ 123
    Memory at e0000000 (64-bit, non-prefetchable) [size=16M]
    Memory at c0000000 (64-bit, prefetchable) [size=512M]
    I/O ports at e000 [size=64]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: [40] Vendor Specific Information: Len=0c <?>
    Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
    Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Capabilities: [100] #1b
    Capabilities: [200] Address Translation Service (ATS)
    Capabilities: [300] #13
    Kernel driver in use: i915_bpo
    Kernel modules: i915_bpo

And in dmesg I see the below text:

[161321.406860] i915_bpo 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[161528.013954] ------------[ cut here ]------------
[161528.013996] WARNING: CPU: 3 PID: 31178 at /build/linux-xHzv4a/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
[161528.013998] WARN_ON(!wm_changed)
[161528.014047] Modules linked in: hid_logitech_hidpp hid_generic hid_logitech_dj usbhid hid snd_usb_audio snd_usbmidi_lib cpuid drbg ansi_cprng ctr ccm rfcomm bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth arc4 joydev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1 kvm snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_compress ac97_bus aes_x86_64 snd_pcm_dmaengine dw_dmac_core iwlmvm lrw snd_hda_intel gf128mul glue_helper snd_hda_codec ablk_helper mac80211 cryptd snd_hda_core snd_hwdep snd_pcm input_leds serio_raw iwlwifi rtsx_pci_ms
[161528.014074] cfg80211 memstick snd_seq_midi thinkpad_acpi snd_seq_midi_event snd_rawmidi nvram mei_me mei shpchp snd_seq snd_seq_device snd_timer snd soundcore tpm_crb mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse e1000e syscopyarea sysfillrect sysimgblt ptp fb_sys_fops pps_core drm nvme rtsx_pci wmi video fjes
[161528.014079] CPU: 3 PID: 31178 Comm: Xorg Not tainted 4.4.0-47-generic #68-Ubuntu
[161528.014080] Hardware name: LENOVO 20F9CTO1WW/20F9CTO1WW, BIOS N1CET47W (1.15 ) 08/08/2016
[161528.014085] 0000000000000286 00000000b170f762 ffff88027b36f600 ffffffff813f5aa3
[161528.014088] ffff88027b36f648 ffffffffc02a39a0 ffff88027b36f638 ffffffff81081262
[161528.014091] ffff880522e26000 ffff88003f96a148 ffff880522e27000 ffff880523193b78
[161528.014092] Call Trace:
[161528.014102] [<ffffffff813f5aa3>] dump_stack+0x63/0x90
[161528.014108] [<ffffffff81081262>] warn_slowpath_common+0x82/0xc0
[161528.014112] [<ffffffff810812fc>] warn_slowpath_fmt+0x5c/0x80
[161528.014144] [<ffffffffc01c4fec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
[161528.014175] [<ffffffffc01c5185>] skl_update_wm+0x185/0x610 [i915_bpo]
[161528.014224] [<ffffffffc02563af>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo]
[161528.014273] [<ffffffffc01c8f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[161528.014326] [<ffffffffc0238681>] haswell_crtc_enable+0x761/0x8e0 [i915_bpo]
[161528.014378] [<ffffffffc0223cbe>] ? intel_finish_crtc_commit+0xe/0x10 [i915_bpo]
[161528.014395] [<ffffffffc01786d4>] ? drm_atomic_helper_commit_planes_on_crtc+0x154/0x270 [drm_kms_helper]
[161528.014449] [<ffffffffc0234586>] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo]
[161528.014488] [<ffffffffc0078bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[161528.014521] [<ffffffffc0079017>] drm_atomic_commit+0x37/0x60 [drm]
[161528.014538] [<ffffffffc0179e4f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper]
[161528.014571] [<ffffffffc007779a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
[161528.014587] [<ffffffffc017c023>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[161528.014601] [<ffffffffc017c09d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[161528.014615] [<ffffffffc017bfa2>] drm_fb_helper_hotplug_event+0xd2/0x120 [drm_kms_helper]
[161528.014628] [<ffffffffc017c046>] drm_fb_helper_restore_fbdev_mode_unlocked+0x56/0x80 [drm_kms_helper]
[161528.014640] [<ffffffffc017c09d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[161528.014694] [<ffffffffc024e5ba>] intel_fbdev_set_par+0x1a/0x60 [i915_bpo]
[161528.014698] [<ffffffff81478f86>] fb_set_var+0x236/0x460
[161528.014704] [<ffffffff812a0b58>] ? ext4_dirty_inode+0x48/0x70
[161528.014709] [<ffffffff812cdec8>] ? __ext4_handle_dirty_metadata+0x48/0x1f0
[161528.014714] [<ffffffff8124538b>] ? __getblk_gfp+0x2b/0x60
[161528.014720] [<ffffffff8146f27f>] fbcon_blank+0x30f/0x350
[161528.014727] [<ffffffff81506633>] do_unblank_screen+0xd3/0x1a0
[161528.014733] [<ffffffff814fbc9a>] vt_ioctl+0x50a/0x12f0
[161528.014739] [<ffffffff814ef15f>] tty_ioctl+0x35f/0xc40
[161528.014745] [<ffffffff81224d38>] ? dput+0xb8/0x220
[161528.014749] [<ffffffff8122e514>] ? mntput+0x24/0x40
[161528.014754] [<ffffffff8120f960>] ? __fput+0x190/0x220
[161528.014758] [<ffffffff8122156f>] do_vfs_ioctl+0x29f/0x490
[161528.014763] [<ffffffff8120fa2e>] ? ____fput+0xe/0x10
[161528.014769] [<ffffffff8109ee06>] ? task_work_run+0x86/0xa0
[161528.014772] [<ffffffff812217d9>] SyS_ioctl+0x79/0x90
[161528.014778] [<ffffffff81834ff2>] entry_SYSCALL_64_fastpath+0x16/0x71
[161528.014781] ---[ end trace 68b4b3ecbd0a020b ]---
[161528.808324] usb 1-4.1: reset high-speed USB device number 7 using xhci_hcd
[161536.339941] ------------[ cut here ]------------
[161536.339974] WARNING: CPU: 3 PID: 32686 at /build/linux-xHzv4a/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1317 drm_wait_one_vblank+0x17b/0x1c0 [drm]()
[161536.339976] vblank not available on crtc 0, ret=-22
[161536.340032] Modules linked in: hid_logitech_hidpp hid_generic hid_logitech_dj usbhid hid snd_usb_audio snd_usbmidi_lib cpuid drbg ansi_cprng ctr ccm rfcomm bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth arc4 joydev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1 kvm snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_compress ac97_bus aes_x86_64 snd_pcm_dmaengine dw_dmac_core iwlmvm lrw snd_hda_intel gf128mul glue_helper snd_hda_codec ablk_helper mac80211 cryptd snd_hda_core snd_hwdep snd_pcm input_leds serio_raw iwlwifi rtsx_pci_ms
[161536.340062] cfg80211 memstick snd_seq_midi thinkpad_acpi snd_seq_midi_event snd_rawmidi nvram mei_me mei shpchp snd_seq snd_seq_device snd_timer snd soundcore tpm_crb mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse e1000e syscopyarea sysfillrect sysimgblt ptp fb_sys_fops pps_core drm nvme rtsx_pci wmi video fjes
[161536.340067] CPU: 3 PID: 32686 Comm: Xorg Tainted: G W 4.4.0-47-generic #68-Ubuntu
[161536.340069] Hardware name: LENOVO 20F9CTO1WW/20F9CTO1WW, BIOS N1CET47W (1.15 ) 08/08/2016
[161536.340074] 0000000000000286 00000000e1424e2f ffff880525fef6d0 ffffffff813f5aa3
[161536.340077] ffff880525fef718 ffffffffc008fb38 ffff880525fef708 ffffffff81081262
[161536.340081] ffff880523193800 0000000000000000 ffff8805225eb800 ffff880523193b68
[161536.340082] Call Trace:
[161536.340092] [<ffffffff813f5aa3>] dump_stack+0x63/0x90
[161536.340099] [<ffffffff81081262>] warn_slowpath_common+0x82/0xc0
[161536.340104] [<ffffffff810812fc>] warn_slowpath_fmt+0x5c/0x80
[161536.340126] [<ffffffffc005f054>] ? drm_vblank_get+0x74/0xc0 [drm]
[161536.340148] [<ffffffffc005f2ab>] drm_wait_one_vblank+0x17b/0x1c0 [drm]
[161536.340205] [<ffffffffc020f190>] ? hsw_write16+0x10/0x10 [i915_bpo]
[161536.340257] [<ffffffffc020f190>] ? hsw_write16+0x10/0x10 [i915_bpo]
[161536.340293] [<ffffffffc01c54b9>] skl_update_wm+0x4b9/0x610 [i915_bpo]
[161536.340329] [<ffffffffc01c8f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[161536.340382] [<ffffffffc0238681>] haswell_crtc_enable+0x761/0x8e0 [i915_bpo]
[161536.340436] [<ffffffffc0234586>] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo]
[161536.340473] [<ffffffffc0078bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[161536.340510] [<ffffffffc0079017>] drm_atomic_commit+0x37/0x60 [drm]
[161536.340535] [<ffffffffc0179e4f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper]
[161536.340574] [<ffffffffc007779a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
[161536.340591] [<ffffffffc017c023>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[161536.340605] [<ffffffffc017c09d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[161536.340659] [<ffffffffc024e5ba>] intel_fbdev_set_par+0x1a/0x60 [i915_bpo]
[161536.340663] [<ffffffff8147903f>] ? fb_set_var+0x2ef/0x460
[161536.340666] [<ffffffff81478f86>] fb_set_var+0x236/0x460
[161536.340672] [<ffffffff8170ca97>] ? sock_poll+0x107/0x120
[161536.340678] [<ffffffff81223416>] ? do_sys_poll+0x146/0x560
[161536.340681] [<ffffffff810b4f59>] ? update_curr+0x79/0x160
[161536.340687] [<ffffffff8146f27f>] fbcon_blank+0x30f/0x350
[161536.340691] [<ffffffff810ab329>] ? ttwu_do_wakeup+0x19/0xe0
[161536.340698] [<ffffffff81506633>] do_unblank_screen+0xd3/0x1a0
[161536.340704] [<ffffffff814fb709>] complete_change_console+0x59/0xe0
[161536.340709] [<ffffffff814fbea0>] vt_ioctl+0x710/0x12f0
[161536.340731] [<ffffffffc005d789>] ? drm_ioctl+0x189/0x540 [drm]
[161536.340737] [<ffffffff814ef15f>] tty_ioctl+0x35f/0xc40
[161536.340744] [<ffffffff811c082d>] ? handle_mm_fault+0xcdd/0x1820
[161536.340748] [<ffffffff8122156f>] do_vfs_ioctl+0x29f/0x490
[161536.340752] [<ffffffff8106b504>] ? __do_page_fault+0x1b4/0x400
[161536.340755] [<ffffffff812217d9>] SyS_ioctl+0x79/0x90
[161536.340761] [<ffffffff81834ff2>] entry_SYSCALL_64_fastpath+0x16/0x71
[161536.340793] ---[ end trace 68b4b3ecbd0a020c ]---
[161536.380101] ------------[ cut here ]------------
[161536.380122] WARNING: CPU: 3 PID: 32686 at /build/linux-xHzv4a/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
[161536.380123] WARN_ON(!wm_changed)
[161536.380145] Modules linked in: hid_logitech_hidpp hid_generic hid_logitech_dj usbhid hid snd_usb_audio snd_usbmidi_lib cpuid drbg ansi_cprng ctr ccm rfcomm bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth arc4 joydev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1 kvm snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_compress ac97_bus aes_x86_64 snd_pcm_dmaengine dw_dmac_core iwlmvm lrw snd_hda_intel gf128mul glue_helper snd_hda_codec ablk_helper mac80211 cryptd snd_hda_core snd_hwdep snd_pcm input_leds serio_raw iwlwifi rtsx_pci_ms
[161536.380158] cfg80211 memstick snd_seq_midi thinkpad_acpi snd_seq_midi_event snd_rawmidi nvram mei_me mei shpchp snd_seq snd_seq_device snd_timer snd soundcore tpm_crb mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse e1000e syscopyarea sysfillrect sysimgblt ptp fb_sys_fops pps_core drm nvme rtsx_pci wmi video fjes
[161536.380161] CPU: 3 PID: 32686 Comm: Xorg Tainted: G W 4.4.0-47-generic #68-Ubuntu
[161536.380161] Hardware name: LENOVO 20F9CTO1WW/20F9CTO1WW, BIOS N1CET47W (1.15 ) 08/08/2016
[161536.380164] 0000000000000286 00000000e1424e2f ffff880525fef650 ffffffff813f5aa3
[161536.380165] ffff880525fef698 ffffffffc02a39a0 ffff880525fef688 ffffffff81081262
[161536.380167] ffff880522e26000 ffff88003f96a148 ffff880522e27000 ffff880523193b78
[161536.380167] Call Trace:
[161536.380172] [<ffffffff813f5aa3>] dump_stack+0x63/0x90
[161536.380175] [<ffffffff81081262>] warn_slowpath_common+0x82/0xc0
[161536.380177] [<ffffffff810812fc>] warn_slowpath_fmt+0x5c/0x80
[161536.380195] [<ffffffffc01c4fec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
[161536.380213] [<ffffffffc01c5185>] skl_update_wm+0x185/0x610 [i915_bpo]
[161536.380241] [<ffffffffc02563af>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo]
[161536.380259] [<ffffffffc01c8f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[161536.380286] [<ffffffffc0238681>] haswell_crtc_enable+0x761/0x8e0 [i915_bpo]
[161536.380313] [<ffffffffc0223cbe>] ? intel_finish_crtc_commit+0xe/0x10 [i915_bpo]
[161536.380322] [<ffffffffc01786d4>] ? drm_atomic_helper_commit_planes_on_crtc+0x154/0x270 [drm_kms_helper]
[161536.380348] [<ffffffffc0234586>] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo]
[161536.380367] [<ffffffffc0078bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[161536.380384] [<ffffffffc0079017>] drm_atomic_commit+0x37/0x60 [drm]
[161536.380392] [<ffffffffc0179e4f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper]
[161536.380409] [<ffffffffc007779a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
[161536.380417] [<ffffffffc017c023>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[161536.380424] [<ffffffffc017c09d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[161536.380450] [<ffffffffc024e5ba>] intel_fbdev_set_par+0x1a/0x60 [i915_bpo]
[161536.380452] [<ffffffff8147903f>] ? fb_set_var+0x2ef/0x460
[161536.380454] [<ffffffff81478f86>] fb_set_var+0x236/0x460
[161536.380456] [<ffffffff8170ca97>] ? sock_poll+0x107/0x120
[161536.380458] [<ffffffff81223416>] ? do_sys_poll+0x146/0x560
[161536.380460] [<ffffffff810b4f59>] ? update_curr+0x79/0x160
[161536.380463] [<ffffffff8146f27f>] fbcon_blank+0x30f/0x350
[161536.380465] [<ffffffff810ab329>] ? ttwu_do_wakeup+0x19/0xe0
[161536.380468] [<ffffffff81506633>] do_unblank_screen+0xd3/0x1a0
[161536.380471] [<ffffffff814fb709>] complete_change_console+0x59/0xe0
[161536.380473] [<ffffffff814fbea0>] vt_ioctl+0x710/0x12f0
[161536.380485] [<ffffffffc005d789>] ? drm_ioctl+0x189/0x540 [drm]
[161536.380487] [<ffffffff814ef15f>] tty_ioctl+0x35f/0xc40
[161536.380490] [<ffffffff811c082d>] ? handle_mm_fault+0xcdd/0x1820
[161536.380492] [<ffffffff8122156f>] do_vfs_ioctl+0x29f/0x490
[161536.380494] [<ffffffff8106b504>] ? __do_page_fault+0x1b4/0x400
[161536.380496] [<ffffffff812217d9>] SyS_ioctl+0x79/0x90
[161536.380498] [<ffffffff81834ff2>] entry_SYSCALL_64_fastpath+0x16/0x71
[161536.380511] ---[ end trace 68b4b3ecbd0a020d ]---
[162373.603247] ------------[ cut here ]------------
[162373.603313] WARNING: CPU: 2 PID: 386 at /build/linux-xHzv4a/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
[162373.603315] WARN_ON(!wm_changed)
[162373.603387] Modules linked in: hid_logitech_hidpp hid_generic hid_logitech_dj usbhid hid snd_usb_audio snd_usbmidi_lib cpuid drbg ansi_cprng ctr ccm rfcomm bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth arc4 joydev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1 kvm snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_compress ac97_bus aes_x86_64 snd_pcm_dmaengine dw_dmac_core iwlmvm lrw snd_hda_intel gf128mul glue_helper snd_hda_codec ablk_helper mac80211 cryptd snd_hda_core snd_hwdep snd_pcm input_leds serio_raw iwlwifi rtsx_pci_ms
[162373.603438] cfg80211 memstick snd_seq_midi thinkpad_acpi snd_seq_midi_event snd_rawmidi nvram mei_me mei shpchp snd_seq snd_seq_device snd_timer snd soundcore tpm_crb mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse e1000e syscopyarea sysfillrect sysimgblt ptp fb_sys_fops pps_core drm nvme rtsx_pci wmi video fjes
[162373.603443] CPU: 2 PID: 386 Comm: kworker/2:1 Tainted: G W 4.4.0-47-generic #68-Ubuntu
[162373.603446] Hardware name: LENOVO 20F9CTO1WW/20F9CTO1WW, BIOS N1CET47W (1.15 ) 08/08/2016
[162373.603455] Workqueue: events console_callback
[162373.603462] 0000000000000286 0000000057921fda ffff8805258b38a0 ffffffff813f5aa3
[162373.603467] ffff8805258b38e8 ffffffffc02a39a0 ffff8805258b38d8 ffffffff81081262
[162373.603472] ffff880522e27000 ffff88003f96a148 ffff880522e26000 ffff880523193b78
[162373.603473] Call Trace:
[162373.603484] [<ffffffff813f5aa3>] dump_stack+0x63/0x90
[162373.603492] [<ffffffff81081262>] warn_slowpath_common+0x82/0xc0
[162373.603497] [<ffffffff810812fc>] warn_slowpath_fmt+0x5c/0x80
[162373.603554] [<ffffffffc01c4fec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
[162373.603610] [<ffffffffc01c5185>] skl_update_wm+0x185/0x610 [i915_bpo]
[162373.603665] [<ffffffffc01c8f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[162373.603739] [<ffffffffc02343f8>] intel_atomic_commit+0x448/0x14a0 [i915_bpo]
[162373.603789] [<ffffffffc0078bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[162373.603834] [<ffffffffc0079017>] drm_atomic_commit+0x37/0x60 [drm]
[162373.603856] [<ffffffffc017750d>] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper]
[162373.603878] [<ffffffffc017afd7>] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper]
[162373.603897] [<ffffffffc017b05d>] drm_fb_helper_blank+0x3d/0x90 [drm_kms_helper]
[162373.603971] [<ffffffffc024e55a>] intel_fbdev_blank+0x1a/0x60 [i915_bpo]
[162373.603976] [<ffffffff81478c76>] fb_blank+0x66/0xc0
[162373.603982] [<ffffffff8146f202>] fbcon_blank+0x292/0x350
[162373.603988] [<ffffffff810b9635>] ? put_prev_entity+0x35/0x7d0
[162373.603996] [<ffffffff810ec984>] ? lock_timer_base.isra.22+0x54/0x70
[162373.604002] [<ffffffff810eca8e>] ? try_to_del_timer_sync+0x5e/0x90
[162373.604008] [<ffffffff815068e0>] do_blank_screen+0x1c0/0x260
[162373.604013] [<ffffffff815076f7>] console_callback+0x77/0x180
[162373.604018] [<ffffffff81830866>] ? __schedule+0x3b6/0xa30
[162373.604025] [<ffffffff8109a4a5>] process_one_work+0x165/0x480
[162373.604030] [<ffffffff8109a80b>] worker_thread+0x4b/0x4c0
[162373.604036] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[162373.604041] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[162373.604046] [<ffffffff810a09e8>] kthread+0xd8/0xf0
[162373.604051] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[162373.604056] [<ffffffff8183538f>] ret_from_fork+0x3f/0x70
[162373.604061] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[162373.604064] ---[ end trace 68b4b3ecbd0a020e ]---
[227004.455208] ------------[ cut here ]------------
[227004.455227] WARNING: CPU: 2 PID: 3435 at /build/linux-xHzv4a/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
[227004.455228] WARN_ON(!wm_changed)
[227004.455252] Modules linked in: hid_logitech_hidpp hid_generic hid_logitech_dj usbhid hid snd_usb_audio snd_usbmidi_lib cpuid drbg ansi_cprng ctr ccm rfcomm bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth arc4 joydev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1 kvm snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_compress ac97_bus aes_x86_64 snd_pcm_dmaengine dw_dmac_core iwlmvm lrw snd_hda_intel gf128mul glue_helper snd_hda_codec ablk_helper mac80211 cryptd snd_hda_core snd_hwdep snd_pcm input_leds serio_raw iwlwifi rtsx_pci_ms
[227004.455265] cfg80211 memstick snd_seq_midi thinkpad_acpi snd_seq_midi_event snd_rawmidi nvram mei_me mei shpchp snd_seq snd_seq_device snd_timer snd soundcore tpm_crb mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse e1000e syscopyarea sysfillrect sysimgblt ptp fb_sys_fops pps_core drm nvme rtsx_pci wmi video fjes
[227004.455267] CPU: 2 PID: 3435 Comm: kworker/2:1 Tainted: G W 4.4.0-47-generic #68-Ubuntu
[227004.455267] Hardware name: LENOVO 20F9CTO1WW/20F9CTO1WW, BIOS N1CET47W (1.15 ) 08/08/2016
[227004.455271] Workqueue: events console_callback
[227004.455273] 0000000000000286 00000000b13cc7b9 ffff880523d27818 ffffffff813f5aa3
[227004.455274] ffff880523d27860 ffffffffc02a39a0 ffff880523d27850 ffffffff81081262
[227004.455275] ffff880522e26000 ffff88003f96a148 ffff880522e27000 ffff880523193b78
[227004.455275] Call Trace:
[227004.455279] [<ffffffff813f5aa3>] dump_stack+0x63/0x90
[227004.455282] [<ffffffff81081262>] warn_slowpath_common+0x82/0xc0
[227004.455284] [<ffffffff810812fc>] warn_slowpath_fmt+0x5c/0x80
[227004.455296] [<ffffffffc01c4fec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
[227004.455308] [<ffffffffc01c5185>] skl_update_wm+0x185/0x610 [i915_bpo]
[227004.455326] [<ffffffffc02563af>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo]
[227004.455338] [<ffffffffc01c8f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[227004.455356] [<ffffffffc0238681>] haswell_crtc_enable+0x761/0x8e0 [i915_bpo]
[227004.455374] [<ffffffffc0234586>] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo]
[227004.455388] [<ffffffffc0078bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[227004.455400] [<ffffffffc0079017>] drm_atomic_commit+0x37/0x60 [drm]
[227004.455406] [<ffffffffc017750d>] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper]
[227004.455412] [<ffffffffc017afd7>] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper]
[227004.455417] [<ffffffffc017b070>] drm_fb_helper_blank+0x50/0x90 [drm_kms_helper]
[227004.455434] [<ffffffffc024e55a>] intel_fbdev_blank+0x1a/0x60 [i915_bpo]
[227004.455436] [<ffffffff81478c76>] fb_blank+0x66/0xc0
[227004.455438] [<ffffffff8146f07e>] fbcon_blank+0x10e/0x350
[227004.455440] [<ffffffff810b700b>] ? dequeue_entity+0x41b/0xa80
[227004.455442] [<ffffffff810ec984>] ? lock_timer_base.isra.22+0x54/0x70
[227004.455444] [<ffffffff810ecb81>] ? internal_add_timer+0x71/0x80
[227004.455445] [<ffffffff810ee86f>] ? mod_timer+0x10f/0x240
[227004.455447] [<ffffffff81506633>] do_unblank_screen+0xd3/0x1a0
[227004.455448] [<ffffffff8150767c>] poke_blanked_console+0xbc/0xc0
[227004.455450] [<ffffffff815077d4>] console_callback+0x154/0x180
[227004.455452] [<ffffffff81830866>] ? __schedule+0x3b6/0xa30
[227004.455454] [<ffffffff8173918e>] ? rtnl_unlock+0xe/0x10
[227004.455456] [<ffffffff8109a4a5>] process_one_work+0x165/0x480
[227004.455458] [<ffffffff8109a80b>] worker_thread+0x4b/0x4c0
[227004.455459] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[227004.455461] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[227004.455462] [<ffffffff810a09e8>] kthread+0xd8/0xf0
[227004.455463] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[227004.455465] [<ffffffff8183538f>] ret_from_fork+0x3f/0x70
[227004.455466] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[227004.455467] ---[ end trace 68b4b3ecbd0a020f ]---
[227624.548049] ------------[ cut here ]------------
[227624.548104] WARNING: CPU: 2 PID: 3435 at /build/linux-xHzv4a/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
[227624.548107] WARN_ON(!wm_changed)
[227624.548162] Modules linked in: hid_logitech_hidpp hid_generic hid_logitech_dj usbhid hid snd_usb_audio snd_usbmidi_lib cpuid drbg ansi_cprng ctr ccm rfcomm bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth arc4 joydev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1 kvm snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_compress ac97_bus aes_x86_64 snd_pcm_dmaengine dw_dmac_core iwlmvm lrw snd_hda_intel gf128mul glue_helper snd_hda_codec ablk_helper mac80211 cryptd snd_hda_core snd_hwdep snd_pcm input_leds serio_raw iwlwifi rtsx_pci_ms
[227624.548206] cfg80211 memstick snd_seq_midi thinkpad_acpi snd_seq_midi_event snd_rawmidi nvram mei_me mei shpchp snd_seq snd_seq_device snd_timer snd soundcore tpm_crb mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse e1000e syscopyarea sysfillrect sysimgblt ptp fb_sys_fops pps_core drm nvme rtsx_pci wmi video fjes
[227624.548212] CPU: 2 PID: 3435 Comm: kworker/2:1 Tainted: G W 4.4.0-47-generic #68-Ubuntu
[227624.548214] Hardware name: LENOVO 20F9CTO1WW/20F9CTO1WW, BIOS N1CET47W (1.15 ) 08/08/2016
[227624.548224] Workqueue: events console_callback
[227624.548229] 0000000000000286 00000000b13cc7b9 ffff880523d278a0 ffffffff813f5aa3
[227624.548233] ffff880523d278e8 ffffffffc02a39a0 ffff880523d278d8 ffffffff81081262
[227624.548236] ffff880522e27000 ffff88003f96a148 ffff880522e26000 ffff880523193b78
[227624.548237] Call Trace:
[227624.548247] [<ffffffff813f5aa3>] dump_stack+0x63/0x90
[227624.548254] [<ffffffff81081262>] warn_slowpath_common+0x82/0xc0
[227624.548259] [<ffffffff810812fc>] warn_slowpath_fmt+0x5c/0x80
[227624.548301] [<ffffffffc01c4fec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
[227624.548341] [<ffffffffc01c5185>] skl_update_wm+0x185/0x610 [i915_bpo]
[227624.548379] [<ffffffffc01c8f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[227624.548437] [<ffffffffc02343f8>] intel_atomic_commit+0x448/0x14a0 [i915_bpo]
[227624.548488] [<ffffffffc0078bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[227624.548523] [<ffffffffc0079017>] drm_atomic_commit+0x37/0x60 [drm]
[227624.548541] [<ffffffffc017750d>] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper]
[227624.548558] [<ffffffffc017afd7>] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper]
[227624.548573] [<ffffffffc017b05d>] drm_fb_helper_blank+0x3d/0x90 [drm_kms_helper]
[227624.548633] [<ffffffffc024e55a>] intel_fbdev_blank+0x1a/0x60 [i915_bpo]
[227624.548637] [<ffffffff81478c76>] fb_blank+0x66/0xc0
[227624.548643] [<ffffffff8146f202>] fbcon_blank+0x292/0x350
[227624.548650] [<ffffffff811ad179>] ? next_zone+0x29/0x30
[227624.548656] [<ffffffff811ae0b3>] ? refresh_cpu_vm_stats+0x103/0x1d0
[227624.548663] [<ffffffff810ec984>] ? lock_timer_base.isra.22+0x54/0x70
[227624.548668] [<ffffffff810eca8e>] ? try_to_del_timer_sync+0x5e/0x90
[227624.548674] [<ffffffff815068e0>] do_blank_screen+0x1c0/0x260
[227624.548678] [<ffffffff815076f7>] console_callback+0x77/0x180
[227624.548682] [<ffffffff81830866>] ? __schedule+0x3b6/0xa30
[227624.548688] [<ffffffff8109a4a5>] process_one_work+0x165/0x480
[227624.548693] [<ffffffff8109a80b>] worker_thread+0x4b/0x4c0
[227624.548697] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[227624.548701] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[227624.548708] [<ffffffff810a09e8>] kthread+0xd8/0xf0
[227624.548711] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[227624.548716] [<ffffffff8183538f>] ret_from_fork+0x3f/0x70
[227624.548719] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[227624.548722] ---[ end trace 68b4b3ecbd0a0210 ]---
[227808.485608] ------------[ cut here ]------------
[227808.485634] WARNING: CPU: 2 PID: 3435 at /build/linux-xHzv4a/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]()
[227808.485635] WARN_ON(!wm_changed)
[227808.485667] Modules linked in: hid_logitech_hidpp hid_generic hid_logitech_dj usbhid hid snd_usb_audio snd_usbmidi_lib cpuid drbg ansi_cprng ctr ccm rfcomm bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth arc4 joydev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1 kvm snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_compress ac97_bus aes_x86_64 snd_pcm_dmaengine dw_dmac_core iwlmvm lrw snd_hda_intel gf128mul glue_helper snd_hda_codec ablk_helper mac80211 cryptd snd_hda_core snd_hwdep snd_pcm input_leds serio_raw iwlwifi rtsx_pci_ms
[227808.485684] cfg80211 memstick snd_seq_midi thinkpad_acpi snd_seq_midi_event snd_rawmidi nvram mei_me mei shpchp snd_seq snd_seq_device snd_timer snd soundcore tpm_crb mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse e1000e syscopyarea sysfillrect sysimgblt ptp fb_sys_fops pps_core drm nvme rtsx_pci wmi video fjes
[227808.485686] CPU: 2 PID: 3435 Comm: kworker/2:1 Tainted: G W 4.4.0-47-generic #68-Ubuntu
[227808.485687] Hardware name: LENOVO 20F9CTO1WW/20F9CTO1WW, BIOS N1CET47W (1.15 ) 08/08/2016
[227808.485692] Workqueue: events console_callback
[227808.485695] 0000000000000286 00000000b13cc7b9 ffff880523d27818 ffffffff813f5aa3
[227808.485697] ffff880523d27860 ffffffffc02a39a0 ffff880523d27850 ffffffff81081262
[227808.485698] ffff880522e26000 ffff88003f96a148 ffff880522e27000 ffff880523193b78
[227808.485699] Call Trace:
[227808.485705] [<ffffffff813f5aa3>] dump_stack+0x63/0x90
[227808.485709] [<ffffffff81081262>] warn_slowpath_common+0x82/0xc0
[227808.485711] [<ffffffff810812fc>] warn_slowpath_fmt+0x5c/0x80
[227808.485729] [<ffffffffc01c4fec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]
[227808.485747] [<ffffffffc01c5185>] skl_update_wm+0x185/0x610 [i915_bpo]
[227808.485774] [<ffffffffc02563af>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo]
[227808.485805] [<ffffffffc01c8f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo]
[227808.485826] [<ffffffffc0238681>] haswell_crtc_enable+0x761/0x8e0 [i915_bpo]
[227808.485848] [<ffffffffc0234586>] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo]
[227808.485865] [<ffffffffc0078bde>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[227808.485879] [<ffffffffc0079017>] drm_atomic_commit+0x37/0x60 [drm]
[227808.485886] [<ffffffffc017750d>] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper]
[227808.485893] [<ffffffffc017afd7>] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper]
[227808.485899] [<ffffffffc017b070>] drm_fb_helper_blank+0x50/0x90 [drm_kms_helper]
[227808.485919] [<ffffffffc024e55a>] intel_fbdev_blank+0x1a/0x60 [i915_bpo]
[227808.485921] [<ffffffff81478c76>] fb_blank+0x66/0xc0
[227808.485924] [<ffffffff8146f07e>] fbcon_blank+0x10e/0x350
[227808.485926] [<ffffffff810b700b>] ? dequeue_entity+0x41b/0xa80
[227808.485928] [<ffffffff8140a805>] ? find_next_bit+0x15/0x20
[227808.485931] [<ffffffff811ad126>] ? next_online_pgdat+0x26/0x50
[227808.485934] [<ffffffff810ec984>] ? lock_timer_base.isra.22+0x54/0x70
[227808.485936] [<ffffffff810ecb81>] ? internal_add_timer+0x71/0x80
[227808.485937] [<ffffffff810ee86f>] ? mod_timer+0x10f/0x240
[227808.485939] [<ffffffff81506633>] do_unblank_screen+0xd3/0x1a0
[227808.485941] [<ffffffff8150767c>] poke_blanked_console+0xbc/0xc0
[227808.485943] [<ffffffff815077d4>] console_callback+0x154/0x180
[227808.485945] [<ffffffff81830866>] ? __schedule+0x3b6/0xa30
[227808.485948] [<ffffffff8109a4a5>] process_one_work+0x165/0x480
[227808.485949] [<ffffffff8109a80b>] worker_thread+0x4b/0x4c0
[227808.485951] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[227808.485953] [<ffffffff8109a7c0>] ? process_one_work+0x480/0x480
[227808.485954] [<ffffffff810a09e8>] kthread+0xd8/0xf0
[227808.485956] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[227808.485958] [<ffffffff8183538f>] ret_from_fork+0x3f/0x70
[227808.485959] [<ffffffff810a0910>] ? kthread_create_on_node+0x1e0/0x1e0
[227808.485970] ---[ end trace 68b4b3ecbd0a0211 ]---