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, 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] [] dump_stack+0x63/0x90 [161528.014108] [] warn_slowpath_common+0x82/0xc0 [161528.014112] [] warn_slowpath_fmt+0x5c/0x80 [161528.014144] [] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo] [161528.014175] [] skl_update_wm+0x185/0x610 [i915_bpo] [161528.014224] [] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo] [161528.014273] [] intel_update_watermarks+0x1e/0x30 [i915_bpo] [161528.014326] [] haswell_crtc_enable+0x761/0x8e0 [i915_bpo] [161528.014378] [] ? intel_finish_crtc_commit+0xe/0x10 [i915_bpo] [161528.014395] [] ? drm_atomic_helper_commit_planes_on_crtc+0x154/0x270 [drm_kms_helper] [161528.014449] [] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo] [161528.014488] [] ? drm_atomic_check_only+0x18e/0x590 [drm] [161528.014521] [] drm_atomic_commit+0x37/0x60 [drm] [161528.014538] [] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper] [161528.014571] [] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [161528.014587] [] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper] [161528.014601] [] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [161528.014615] [] drm_fb_helper_hotplug_event+0xd2/0x120 [drm_kms_helper] [161528.014628] [] drm_fb_helper_restore_fbdev_mode_unlocked+0x56/0x80 [drm_kms_helper] [161528.014640] [] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [161528.014694] [] intel_fbdev_set_par+0x1a/0x60 [i915_bpo] [161528.014698] [] fb_set_var+0x236/0x460 [161528.014704] [] ? ext4_dirty_inode+0x48/0x70 [161528.014709] [] ? __ext4_handle_dirty_metadata+0x48/0x1f0 [161528.014714] [] ? __getblk_gfp+0x2b/0x60 [161528.014720] [] fbcon_blank+0x30f/0x350 [161528.014727] [] do_unblank_screen+0xd3/0x1a0 [161528.014733] [] vt_ioctl+0x50a/0x12f0 [161528.014739] [] tty_ioctl+0x35f/0xc40 [161528.014745] [] ? dput+0xb8/0x220 [161528.014749] [] ? mntput+0x24/0x40 [161528.014754] [] ? __fput+0x190/0x220 [161528.014758] [] do_vfs_ioctl+0x29f/0x490 [161528.014763] [] ? ____fput+0xe/0x10 [161528.014769] [] ? task_work_run+0x86/0xa0 [161528.014772] [] SyS_ioctl+0x79/0x90 [161528.014778] [] 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] [] dump_stack+0x63/0x90 [161536.340099] [] warn_slowpath_common+0x82/0xc0 [161536.340104] [] warn_slowpath_fmt+0x5c/0x80 [161536.340126] [] ? drm_vblank_get+0x74/0xc0 [drm] [161536.340148] [] drm_wait_one_vblank+0x17b/0x1c0 [drm] [161536.340205] [] ? hsw_write16+0x10/0x10 [i915_bpo] [161536.340257] [] ? hsw_write16+0x10/0x10 [i915_bpo] [161536.340293] [] skl_update_wm+0x4b9/0x610 [i915_bpo] [161536.340329] [] intel_update_watermarks+0x1e/0x30 [i915_bpo] [161536.340382] [] haswell_crtc_enable+0x761/0x8e0 [i915_bpo] [161536.340436] [] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo] [161536.340473] [] ? drm_atomic_check_only+0x18e/0x590 [drm] [161536.340510] [] drm_atomic_commit+0x37/0x60 [drm] [161536.340535] [] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper] [161536.340574] [] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [161536.340591] [] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper] [161536.340605] [] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [161536.340659] [] intel_fbdev_set_par+0x1a/0x60 [i915_bpo] [161536.340663] [] ? fb_set_var+0x2ef/0x460 [161536.340666] [] fb_set_var+0x236/0x460 [161536.340672] [] ? sock_poll+0x107/0x120 [161536.340678] [] ? do_sys_poll+0x146/0x560 [161536.340681] [] ? update_curr+0x79/0x160 [161536.340687] [] fbcon_blank+0x30f/0x350 [161536.340691] [] ? ttwu_do_wakeup+0x19/0xe0 [161536.340698] [] do_unblank_screen+0xd3/0x1a0 [161536.340704] [] complete_change_console+0x59/0xe0 [161536.340709] [] vt_ioctl+0x710/0x12f0 [161536.340731] [] ? drm_ioctl+0x189/0x540 [drm] [161536.340737] [] tty_ioctl+0x35f/0xc40 [161536.340744] [] ? handle_mm_fault+0xcdd/0x1820 [161536.340748] [] do_vfs_ioctl+0x29f/0x490 [161536.340752] [] ? __do_page_fault+0x1b4/0x400 [161536.340755] [] SyS_ioctl+0x79/0x90 [161536.340761] [] 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] [] dump_stack+0x63/0x90 [161536.380175] [] warn_slowpath_common+0x82/0xc0 [161536.380177] [] warn_slowpath_fmt+0x5c/0x80 [161536.380195] [] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo] [161536.380213] [] skl_update_wm+0x185/0x610 [i915_bpo] [161536.380241] [] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo] [161536.380259] [] intel_update_watermarks+0x1e/0x30 [i915_bpo] [161536.380286] [] haswell_crtc_enable+0x761/0x8e0 [i915_bpo] [161536.380313] [] ? intel_finish_crtc_commit+0xe/0x10 [i915_bpo] [161536.380322] [] ? drm_atomic_helper_commit_planes_on_crtc+0x154/0x270 [drm_kms_helper] [161536.380348] [] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo] [161536.380367] [] ? drm_atomic_check_only+0x18e/0x590 [drm] [161536.380384] [] drm_atomic_commit+0x37/0x60 [drm] [161536.380392] [] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper] [161536.380409] [] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [161536.380417] [] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper] [161536.380424] [] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [161536.380450] [] intel_fbdev_set_par+0x1a/0x60 [i915_bpo] [161536.380452] [] ? fb_set_var+0x2ef/0x460 [161536.380454] [] fb_set_var+0x236/0x460 [161536.380456] [] ? sock_poll+0x107/0x120 [161536.380458] [] ? do_sys_poll+0x146/0x560 [161536.380460] [] ? update_curr+0x79/0x160 [161536.380463] [] fbcon_blank+0x30f/0x350 [161536.380465] [] ? ttwu_do_wakeup+0x19/0xe0 [161536.380468] [] do_unblank_screen+0xd3/0x1a0 [161536.380471] [] complete_change_console+0x59/0xe0 [161536.380473] [] vt_ioctl+0x710/0x12f0 [161536.380485] [] ? drm_ioctl+0x189/0x540 [drm] [161536.380487] [] tty_ioctl+0x35f/0xc40 [161536.380490] [] ? handle_mm_fault+0xcdd/0x1820 [161536.380492] [] do_vfs_ioctl+0x29f/0x490 [161536.380494] [] ? __do_page_fault+0x1b4/0x400 [161536.380496] [] SyS_ioctl+0x79/0x90 [161536.380498] [] 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] [] dump_stack+0x63/0x90 [162373.603492] [] warn_slowpath_common+0x82/0xc0 [162373.603497] [] warn_slowpath_fmt+0x5c/0x80 [162373.603554] [] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo] [162373.603610] [] skl_update_wm+0x185/0x610 [i915_bpo] [162373.603665] [] intel_update_watermarks+0x1e/0x30 [i915_bpo] [162373.603739] [] intel_atomic_commit+0x448/0x14a0 [i915_bpo] [162373.603789] [] ? drm_atomic_check_only+0x18e/0x590 [drm] [162373.603834] [] drm_atomic_commit+0x37/0x60 [drm] [162373.603856] [] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper] [162373.603878] [] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper] [162373.603897] [] drm_fb_helper_blank+0x3d/0x90 [drm_kms_helper] [162373.603971] [] intel_fbdev_blank+0x1a/0x60 [i915_bpo] [162373.603976] [] fb_blank+0x66/0xc0 [162373.603982] [] fbcon_blank+0x292/0x350 [162373.603988] [] ? put_prev_entity+0x35/0x7d0 [162373.603996] [] ? lock_timer_base.isra.22+0x54/0x70 [162373.604002] [] ? try_to_del_timer_sync+0x5e/0x90 [162373.604008] [] do_blank_screen+0x1c0/0x260 [162373.604013] [] console_callback+0x77/0x180 [162373.604018] [] ? __schedule+0x3b6/0xa30 [162373.604025] [] process_one_work+0x165/0x480 [162373.604030] [] worker_thread+0x4b/0x4c0 [162373.604036] [] ? process_one_work+0x480/0x480 [162373.604041] [] ? process_one_work+0x480/0x480 [162373.604046] [] kthread+0xd8/0xf0 [162373.604051] [] ? kthread_create_on_node+0x1e0/0x1e0 [162373.604056] [] ret_from_fork+0x3f/0x70 [162373.604061] [] ? 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] [] dump_stack+0x63/0x90 [227004.455282] [] warn_slowpath_common+0x82/0xc0 [227004.455284] [] warn_slowpath_fmt+0x5c/0x80 [227004.455296] [] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo] [227004.455308] [] skl_update_wm+0x185/0x610 [i915_bpo] [227004.455326] [] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo] [227004.455338] [] intel_update_watermarks+0x1e/0x30 [i915_bpo] [227004.455356] [] haswell_crtc_enable+0x761/0x8e0 [i915_bpo] [227004.455374] [] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo] [227004.455388] [] ? drm_atomic_check_only+0x18e/0x590 [drm] [227004.455400] [] drm_atomic_commit+0x37/0x60 [drm] [227004.455406] [] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper] [227004.455412] [] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper] [227004.455417] [] drm_fb_helper_blank+0x50/0x90 [drm_kms_helper] [227004.455434] [] intel_fbdev_blank+0x1a/0x60 [i915_bpo] [227004.455436] [] fb_blank+0x66/0xc0 [227004.455438] [] fbcon_blank+0x10e/0x350 [227004.455440] [] ? dequeue_entity+0x41b/0xa80 [227004.455442] [] ? lock_timer_base.isra.22+0x54/0x70 [227004.455444] [] ? internal_add_timer+0x71/0x80 [227004.455445] [] ? mod_timer+0x10f/0x240 [227004.455447] [] do_unblank_screen+0xd3/0x1a0 [227004.455448] [] poke_blanked_console+0xbc/0xc0 [227004.455450] [] console_callback+0x154/0x180 [227004.455452] [] ? __schedule+0x3b6/0xa30 [227004.455454] [] ? rtnl_unlock+0xe/0x10 [227004.455456] [] process_one_work+0x165/0x480 [227004.455458] [] worker_thread+0x4b/0x4c0 [227004.455459] [] ? process_one_work+0x480/0x480 [227004.455461] [] ? process_one_work+0x480/0x480 [227004.455462] [] kthread+0xd8/0xf0 [227004.455463] [] ? kthread_create_on_node+0x1e0/0x1e0 [227004.455465] [] ret_from_fork+0x3f/0x70 [227004.455466] [] ? 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] [] dump_stack+0x63/0x90 [227624.548254] [] warn_slowpath_common+0x82/0xc0 [227624.548259] [] warn_slowpath_fmt+0x5c/0x80 [227624.548301] [] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo] [227624.548341] [] skl_update_wm+0x185/0x610 [i915_bpo] [227624.548379] [] intel_update_watermarks+0x1e/0x30 [i915_bpo] [227624.548437] [] intel_atomic_commit+0x448/0x14a0 [i915_bpo] [227624.548488] [] ? drm_atomic_check_only+0x18e/0x590 [drm] [227624.548523] [] drm_atomic_commit+0x37/0x60 [drm] [227624.548541] [] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper] [227624.548558] [] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper] [227624.548573] [] drm_fb_helper_blank+0x3d/0x90 [drm_kms_helper] [227624.548633] [] intel_fbdev_blank+0x1a/0x60 [i915_bpo] [227624.548637] [] fb_blank+0x66/0xc0 [227624.548643] [] fbcon_blank+0x292/0x350 [227624.548650] [] ? next_zone+0x29/0x30 [227624.548656] [] ? refresh_cpu_vm_stats+0x103/0x1d0 [227624.548663] [] ? lock_timer_base.isra.22+0x54/0x70 [227624.548668] [] ? try_to_del_timer_sync+0x5e/0x90 [227624.548674] [] do_blank_screen+0x1c0/0x260 [227624.548678] [] console_callback+0x77/0x180 [227624.548682] [] ? __schedule+0x3b6/0xa30 [227624.548688] [] process_one_work+0x165/0x480 [227624.548693] [] worker_thread+0x4b/0x4c0 [227624.548697] [] ? process_one_work+0x480/0x480 [227624.548701] [] ? process_one_work+0x480/0x480 [227624.548708] [] kthread+0xd8/0xf0 [227624.548711] [] ? kthread_create_on_node+0x1e0/0x1e0 [227624.548716] [] ret_from_fork+0x3f/0x70 [227624.548719] [] ? 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] [] dump_stack+0x63/0x90 [227808.485709] [] warn_slowpath_common+0x82/0xc0 [227808.485711] [] warn_slowpath_fmt+0x5c/0x80 [227808.485729] [] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo] [227808.485747] [] skl_update_wm+0x185/0x610 [i915_bpo] [227808.485774] [] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo] [227808.485805] [] intel_update_watermarks+0x1e/0x30 [i915_bpo] [227808.485826] [] haswell_crtc_enable+0x761/0x8e0 [i915_bpo] [227808.485848] [] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo] [227808.485865] [] ? drm_atomic_check_only+0x18e/0x590 [drm] [227808.485879] [] drm_atomic_commit+0x37/0x60 [drm] [227808.485886] [] drm_atomic_helper_connector_dpms+0xed/0x1a0 [drm_kms_helper] [227808.485893] [] drm_fb_helper_dpms.isra.8+0x97/0xe0 [drm_kms_helper] [227808.485899] [] drm_fb_helper_blank+0x50/0x90 [drm_kms_helper] [227808.485919] [] intel_fbdev_blank+0x1a/0x60 [i915_bpo] [227808.485921] [] fb_blank+0x66/0xc0 [227808.485924] [] fbcon_blank+0x10e/0x350 [227808.485926] [] ? dequeue_entity+0x41b/0xa80 [227808.485928] [] ? find_next_bit+0x15/0x20 [227808.485931] [] ? next_online_pgdat+0x26/0x50 [227808.485934] [] ? lock_timer_base.isra.22+0x54/0x70 [227808.485936] [] ? internal_add_timer+0x71/0x80 [227808.485937] [] ? mod_timer+0x10f/0x240 [227808.485939] [] do_unblank_screen+0xd3/0x1a0 [227808.485941] [] poke_blanked_console+0xbc/0xc0 [227808.485943] [] console_callback+0x154/0x180 [227808.485945] [] ? __schedule+0x3b6/0xa30 [227808.485948] [] process_one_work+0x165/0x480 [227808.485949] [] worker_thread+0x4b/0x4c0 [227808.485951] [] ? process_one_work+0x480/0x480 [227808.485953] [] ? process_one_work+0x480/0x480 [227808.485954] [] kthread+0xd8/0xf0 [227808.485956] [] ? kthread_create_on_node+0x1e0/0x1e0 [227808.485958] [] ret_from_fork+0x3f/0x70 [227808.485959] [] ? kthread_create_on_node+0x1e0/0x1e0 [227808.485970] ---[ end trace 68b4b3ecbd0a0211 ]---