Sometimes, my laptop does not freeze. Just now I was able to see the external display upon my second attempt, and found 8 backtraces in dmesg:
[26529.773617] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable link training [26529.776319] [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* failed to start channel equalization [26529.778857] [drm:intel_mst_pre_enable_dp [i915]] *ERROR* failed to allocate v cpi [26529.845810] ------------[ cut here ]------------ [26529.845837] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12740 intel_modeset_check_state+0x5b3/0x8a0 [i915]() [26529.845838] encoder detached but still enabled on pipe A. [26529.845839] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26529.845870] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26529.845882] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26529.845884] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26529.845885] 0000000000000286 0000000088216a49 ffff880034c97b08 ffffffff813e9c53 [26529.845887] ffff880034c97b50 ffffffffc027ca50 ffff880034c97b40 ffffffff81080fb2 [26529.845889] ffff8802443c4318 ffff8800356b1000 ffff8802443c4348 ffff8802443c4330 [26529.845890] Call Trace: [26529.845895] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26529.845898] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26529.845899] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26529.845916] [<ffffffffc020d483>] intel_modeset_check_state+0x5b3/0x8a0 [i915] [26529.845932] [<ffffffffc0218bcb>] intel_atomic_commit+0x4bb/0x6f0 [i915] [26529.845947] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26529.845954] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26529.845964] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26529.845974] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26529.845981] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26529.845984] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60 [26529.845992] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26529.845995] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26529.845997] [<ffffffff8103b32d>] ? fpu__restore_sig+0x4d/0x60 [26529.845999] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26529.846002] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26529.846004] ---[ end trace 1dc2836a34f42c84 ]--- [26530.067034] ------------[ cut here ]------------ [26530.067056] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12732 intel_modeset_check_state+0x563/0x8a0 [i915]() [26530.067057] encoder's enabled state mismatch (expected 1, found 0) [26530.067057] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26530.067085] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26530.067096] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26530.067097] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26530.067098] 0000000000000286 0000000088216a49 ffff880034c97b08 ffffffff813e9c53 [26530.067100] ffff880034c97b50 ffffffffc027ca50 ffff880034c97b40 ffffffff81080fb2 [26530.067101] ffff8802443c4318 ffff880035505b00 ffff8802443c4348 ffff8802443c4330 [26530.067103] Call Trace: [26530.067107] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26530.067109] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26530.067111] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26530.067125] [<ffffffffc020d433>] intel_modeset_check_state+0x563/0x8a0 [i915] [26530.067138] [<ffffffffc022027e>] ? intel_cleanup_plane_fb+0x4e/0x70 [i915] [26530.067150] [<ffffffffc0218bcb>] intel_atomic_commit+0x4bb/0x6f0 [i915] [26530.067162] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26530.067168] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26530.067177] [<ffffffffc005b46a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [26530.067185] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26530.067193] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26530.067199] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26530.067205] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26530.067208] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26530.067210] [<ffffffff8120eee1>] ? __sb_end_write+0x21/0x30 [26530.067211] [<ffffffff8120caed>] ? vfs_write+0x15d/0x1a0 [26530.067213] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26530.067215] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26530.067217] ---[ end trace 1dc2836a34f42c85 ]--- [26530.307982] [drm:intel_mst_pre_enable_dp [i915]] *ERROR* can't find connector [26530.307986] ------------[ cut here ]------------ [26530.308001] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_ddi.c:744 intel_ddi_get_crtc_encoder+0x87/0x90 [i915]() [26530.308002] 2 encoders on crtc for pipe A [26530.308003] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26530.308031] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26530.308043] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26530.308044] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26530.308045] 0000000000000286 0000000088216a49 ffff880034c97aa8 ffffffff813e9c53 [26530.308046] ffff880034c97af0 ffffffffc0282bf8 ffff880034c97ae0 ffffffff81080fb2 [26530.308048] ffff880035505b00 ffff880035690000 ffff880035690000 ffff8802443c4340 [26530.308050] Call Trace: [26530.308053] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26530.308056] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26530.308057] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26530.308072] [<ffffffffc0234797>] intel_ddi_get_crtc_encoder+0x87/0x90 [i915] [26530.308085] [<ffffffffc0237a6e>] intel_ddi_enable_pipe_clock+0x2e/0x90 [i915] [26530.308099] [<ffffffffc021bfcc>] haswell_crtc_enable+0x71c/0x870 [i915] [26530.308113] [<ffffffffc0218b64>] intel_atomic_commit+0x454/0x6f0 [i915] [26530.308125] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26530.308131] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26530.308139] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26530.308148] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26530.308154] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26530.308162] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26530.308164] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26530.308166] [<ffffffff8108e0e1>] ? __set_task_blocked+0x41/0xa0 [26530.308168] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60 [26530.308170] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26530.308171] [<ffffffff81090d2e>] ? SyS_rt_sigprocmask+0x8e/0xc0 [26530.308174] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26530.308175] ---[ end trace 1dc2836a34f42c86 ]--- [26530.308287] ------------[ cut here ]------------ [26530.308302] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_ddi.c:744 intel_ddi_get_crtc_encoder+0x87/0x90 [i915]() [26530.308303] 2 encoders on crtc for pipe A [26530.308303] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26530.308323] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26530.308332] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26530.308332] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26530.308333] 0000000000000286 0000000088216a49 ffff880034c97ac0 ffffffff813e9c53 [26530.308335] ffff880034c97b08 ffffffffc0282bf8 ffff880034c97af8 ffffffff81080fb2 [26530.308336] ffff880035505b00 ffff880035690000 ffff880035690000 ffff8802443c4340 [26530.308338] Call Trace: [26530.308340] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26530.308341] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26530.308343] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26530.308357] [<ffffffffc0234797>] intel_ddi_get_crtc_encoder+0x87/0x90 [i915] [26530.308371] [<ffffffffc023755b>] intel_ddi_set_pipe_settings+0x1b/0xa0 [i915] [26530.308385] [<ffffffffc021bc0e>] haswell_crtc_enable+0x35e/0x870 [i915] [26530.308399] [<ffffffffc0218b64>] intel_atomic_commit+0x454/0x6f0 [i915] [26530.308409] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26530.308413] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26530.308421] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26530.308430] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26530.308436] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26530.308444] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26530.308446] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26530.308447] [<ffffffff8108e0e1>] ? __set_task_blocked+0x41/0xa0 [26530.308449] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60 [26530.308450] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26530.308452] [<ffffffff81090d2e>] ? SyS_rt_sigprocmask+0x8e/0xc0 [26530.308454] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26530.308455] ---[ end trace 1dc2836a34f42c87 ]--- [26530.308457] ------------[ cut here ]------------ [26530.308471] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/driv ers/gpu/drm/i915/intel_ddi.c:744 intel_ddi_get_crtc_encoder+0x87/0x90 [i915]() [26530.308472] 2 encoders on crtc for pipe A [26530.308472] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vbox netflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26530.308492] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26530.308501] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26530.308501] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26530.308502] 0000000000000286 0000000088216a49 ffff880034c97a80 ffffffff813e9c53 [26530.308504] ffff880034c97ac8 ffffffffc0282bf8 ffff880034c97ab8 ffffffff81080fb2 [26530.308505] ffff880035505b00 ffff88023f226000 ffff880035690000 ffff8802443c4340 [26530.308507] Call Trace: [26530.308509] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26530.308511] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26530.308512] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26530.308514] [<ffffffff8108104c>] ? warn_slowpath_fmt+0x5c/0x80 [26530.308528] [<ffffffffc0234797>] intel_ddi_get_crtc_encoder+0x87/0x90 [i915] [26530.308541] [<ffffffffc023768d>] intel_ddi_enable_transcoder_func+0x2d/0x260 [i915] [26530.308555] [<ffffffffc021bfbf>] haswell_crtc_enable+0x70f/0x870 [i915] [26530.308569] [<ffffffffc0218b64>] intel_atomic_commit+0x454/0x6f0 [i915] [26530.308579] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26530.308584] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26530.308592] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26530.308600] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26530.308606] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26530.308614] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26530.308616] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26530.308618] [<ffffffff8108e0e1>] ? __set_task_blocked+0x41/0xa0 [26530.308620] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60 [26530.308621] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26530.308622] [<ffffffff81090d2e>] ? SyS_rt_sigprocmask+0x8e/0xc0 [26530.308624] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26530.308626] ---[ end trace 1dc2836a34f42c88 ]--- [26530.375450] ------------[ cut here ]------------ [26530.375477] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12732 intel_modeset_check_state+0x563/0x8a0 [i915]() [26530.375479] encoder's enabled state mismatch (expected 1, found 0) [26530.375480] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26530.375511] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26530.375523] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26530.375525] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26530.375526] 0000000000000286 0000000088216a49 ffff880034c97b08 ffffffff813e9c53 [26530.375528] ffff880034c97b50 ffffffffc027ca50 ffff880034c97b40 ffffffff81080fb2 [26530.375530] ffff8802443c4318 ffff880035505b00 ffff8802443c4348 ffff8802443c4330 [26530.375531] Call Trace: [26530.375536] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26530.375539] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26530.375540] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26530.375557] [<ffffffffc020d433>] intel_modeset_check_state+0x563/0x8a0 [i915] [26530.375573] [<ffffffffc0218bcb>] intel_atomic_commit+0x4bb/0x6f0 [i915] [26530.375588] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26530.375595] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26530.375605] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26530.375615] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26530.375622] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26530.375631] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26530.375634] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26530.375636] [<ffffffff8108e0e1>] ? __set_task_blocked+0x41/0xa0 [26530.375638] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60 [26530.375640] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26530.375641] [<ffffffff81090d2e>] ? SyS_rt_sigprocmask+0x8e/0xc0 [26530.375645] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26530.375646] ---[ end trace 1dc2836a34f42c89 ]--- [26530.375659] ------------[ cut here ]------------ [26530.375678] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12794 intel_modeset_check_state+0x714/0x8a0 [i915]() [26530.375679] [ENCODER:41] active 0 with crtc active 1 [26530.375680] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26530.375704] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26530.375713] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26530.375714] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26530.375715] 0000000000000286 0000000088216a49 ffff880034c97b08 ffffffff813e9c53 [26530.375717] ffff880034c97b50 ffffffffc027ca50 ffff880034c97b40 ffffffff81080fb2 [26530.375719] ffff880035505b00 ffff88023f226000 ffff8801b2d3d200 ffff88024161c400 [26530.375721] Call Trace: [26530.375723] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26530.375725] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26530.375727] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26530.375746] [<ffffffffc02360b7>] ? intel_ddi_get_config+0xe7/0x210 [i915] [26530.375763] [<ffffffffc020d5e4>] intel_modeset_check_state+0x714/0x8a0 [i915] [26530.375781] [<ffffffffc0218bcb>] intel_atomic_commit+0x4bb/0x6f0 [i915] [26530.375794] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26530.375799] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26530.375809] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26530.375820] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26530.375828] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26530.375838] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26530.375840] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26530.375842] [<ffffffff8108e0e1>] ? __set_task_blocked+0x41/0xa0 [26530.375844] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60 [26530.375846] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26530.375848] [<ffffffff81090d2e>] ? SyS_rt_sigprocmask+0x8e/0xc0 [26530.375850] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26530.375852] ---[ end trace 1dc2836a34f42c8a ]--- [26530.375872] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ddi_pll_sel (expected 0x20000000, found 0x00000000) [26530.375890] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 140000, found 279999) [26530.375908] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in port_clock (expected 270000, found 540000) [26530.375909] ------------[ cut here ]------------ [26530.375927] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12810 intel_modeset_check_state+0x6a0/0x8a0 [i915]() [26530.375927] pipe state doesn't match! [26530.375928] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore [26530.375952] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes [26530.375961] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu [26530.375962] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015 [26530.375963] 0000000000000286 0000000088216a49 ffff880034c97b08 ffffffff813e9c53 [26530.375965] ffff880034c97b50 ffffffffc027ca50 ffff880034c97b40 ffffffff81080fb2 [26530.375967] ffff880241619000 ffff88023f226000 ffff8801b2d3d200 ffff88024161c400 [26530.375969] Call Trace: [26530.375971] [<ffffffff813e9c53>] dump_stack+0x63/0x90 [26530.375973] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0 [26530.375975] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80 [26530.375993] [<ffffffffc020d570>] intel_modeset_check_state+0x6a0/0x8a0 [i915] [26530.376011] [<ffffffffc0218bcb>] intel_atomic_commit+0x4bb/0x6f0 [i915] [26530.376024] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm] [26530.376029] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [26530.376039] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm] [26530.376050] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [26530.376057] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm] [26530.376068] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [26530.376070] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490 [26530.376072] [<ffffffff8108e0e1>] ? __set_task_blocked+0x41/0xa0 [26530.376074] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60 [26530.376075] [<ffffffff812204d9>] SyS_ioctl+0x79/0x90 [26530.376077] [<ffffffff81090d2e>] ? SyS_rt_sigprocmask+0x8e/0xc0 [26530.376080] [<ffffffff818252f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [26530.376081] ---[ end trace 1dc2836a34f42c8b ]--- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1581560 Title: system crash when attaching external display To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1581560/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
