Bug is still there with the most recent update: ilya@thinkpad:~$ uname -a Linux thinkpad 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
It can be triggered by VT switching *after* some time the system is up. Below is the piece of dmesg log: [175890.502451] ------------[ cut here ]------------ [175890.502491] WARNING: CPU: 2 PID: 3425 at /build/linux-a2WvEb/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b5/0x1c0 [drm]() [175890.502492] vblank wait timed out on crtc 0 [175890.502546] Modules linked in: msr ctr ccm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass arc4 iwldvm input_leds joydev mac80211 serio_raw snd_hda_codec_hdmi iwlwifi snd_hda_codec_conexant snd_hda_codec_generic cfg80211 snd_hda_intel lpc_ich snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq thinkpad_acpi snd_seq_device nvram snd_timer snd mac_hid mei_me mei shpchp soundcore ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter [175890.502586] ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter parport_pc ip_tables x_tables ppdev lp parport autofs4 btrfs xor raid6_pq drbg ansi_cprng algif_skcipher af_alg dm_crypt dm_mirror dm_region_hash dm_log hid_generic usbhid hid crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse i915 sdhci_pci sdhci i2c_algo_bit ahci drm_kms_helper libahci syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e drm ptp pps_core fjes video wmi [175890.502590] CPU: 2 PID: 3425 Comm: Xorg Not tainted 4.4.0-36-generic #55-Ubuntu [175890.502592] Hardware name: LENOVO 4286CTO/4286CTO, BIOS 8DET50WW (1.20 ) 07/07/2011 [175890.502597] 0000000000000286 00000000319e2a0a ffff88040611f838 ffffffff813f13b3 [175890.502599] ffff88040611f880 ffffffffc0071b38 ffff88040611f870 ffffffff810810f2 [175890.502602] ffff8800d49be000 0000000000000000 0000000000000000 00000000001a6bf2 [175890.502603] Call Trace: [175890.502615] [<ffffffff813f13b3>] dump_stack+0x63/0x90 [175890.502622] [<ffffffff810810f2>] warn_slowpath_common+0x82/0xc0 [175890.502625] [<ffffffff8108118c>] warn_slowpath_fmt+0x5c/0x80 [175890.502632] [<ffffffff810c3815>] ? finish_wait+0x55/0x70 [175890.502655] [<ffffffffc00412d5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm] [175890.502660] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60 [175890.502716] [<ffffffffc01fed5a>] intel_atomic_commit+0x43a/0x6f0 [i915] [175890.502749] [<ffffffffc005a937>] ? drm_atomic_add_affected_connectors+0x27/0xf0 [drm] [175890.502778] [<ffffffffc005afc7>] drm_atomic_commit+0x37/0x60 [drm] [175890.502795] [<ffffffffc012ee1f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper] [175890.502825] [<ffffffffc005974a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [175890.502840] [<ffffffffc0130ff3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper] [175890.502852] [<ffffffffc013106d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [175890.502901] [<ffffffffc0213c0a>] intel_fbdev_set_par+0x1a/0x60 [i915] [175890.502906] [<ffffffff8147477f>] ? fb_set_var+0x2ef/0x460 [175890.502910] [<ffffffff814746c6>] fb_set_var+0x236/0x460 [175890.502914] [<ffffffff810b4d39>] ? update_curr+0x79/0x160 [175890.502919] [<ffffffff8146a9bf>] fbcon_blank+0x30f/0x350 [175890.502923] [<ffffffff810ab149>] ? ttwu_do_wakeup+0x19/0xe0 [175890.502929] [<ffffffff81501cb3>] do_unblank_screen+0xd3/0x1a0 [175890.502934] [<ffffffff814f6d89>] complete_change_console+0x59/0xe0 [175890.502938] [<ffffffff814f7520>] vt_ioctl+0x710/0x12f0 [175890.502960] [<ffffffffc003f779>] ? drm_ioctl+0x189/0x540 [drm] [175890.502966] [<ffffffff814ea7ef>] tty_ioctl+0x35f/0xc40 [175890.502972] [<ffffffff811c012d>] ? handle_mm_fault+0xcdd/0x1820 [175890.502976] [<ffffffff81220c1f>] do_vfs_ioctl+0x29f/0x490 [175890.502980] [<ffffffff8106b544>] ? __do_page_fault+0x1b4/0x400 [175890.502982] [<ffffffff81220e89>] SyS_ioctl+0x79/0x90 [175890.502987] [<ffffffff8182dfb2>] entry_SYSCALL_64_fastpath+0x16/0x71 [175890.502990] ---[ end trace dcdb242875193ae6 ]--- Attempt to get back to Unity session results is extremely slowly responsive system. Switching back to tty1 takes approximately 80 seconds. A new set of trace information is in dmesg: [176009.892085] ------------[ cut here ]------------ [176009.892180] WARNING: CPU: 3 PID: 3425 at /build/linux-a2WvEb/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:3963 intel_crtc_wait_for_pending_flips+0x1e2/0x240 [i915]() [176009.892185] WARN_ON(wait_event_timeout(dev_priv->pending_flip_queue, !intel_crtc_has_pending_flip(crtc), 60*HZ) == 0) [176009.892189] Modules linked in: [176009.892194] msr ctr ccm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass arc4 iwldvm input_leds joydev mac80211 serio_raw snd_hda_codec_hdmi iwlwifi snd_hda_codec_conexant snd_hda_codec_generic cfg80211 snd_hda_intel lpc_ich snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq thinkpad_acpi snd_seq_device nvram snd_timer snd mac_hid mei_me mei shpchp soundcore ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables [176009.892285] nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter parport_pc ip_tables x_tables ppdev lp parport autofs4 btrfs xor raid6_pq drbg ansi_cprng algif_skcipher af_alg dm_crypt dm_mirror dm_region_hash dm_log hid_generic usbhid hid crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse i915 sdhci_pci sdhci i2c_algo_bit ahci drm_kms_helper libahci syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e drm ptp pps_core fjes video wmi [176009.892358] CPU: 3 PID: 3425 Comm: Xorg Tainted: G W 4.4.0-36-generic #55-Ubuntu [176009.892361] Hardware name: LENOVO 4286CTO/4286CTO, BIOS 8DET50WW (1.20 ) 07/07/2011 [176009.892366] 0000000000000286 00000000319e2a0a ffff88040611faa0 ffffffff813f13b3 [176009.892373] ffff88040611fae8 ffffffffc0262ad8 ffff88040611fad8 ffffffff810810f2 [176009.892378] ffff8800d49be1a8 ffff880035449008 ffff8800d4be0000 ffff8800d49be000 [176009.892384] Call Trace: [176009.892399] [<ffffffff813f13b3>] dump_stack+0x63/0x90 [176009.892411] [<ffffffff810810f2>] warn_slowpath_common+0x82/0xc0 [176009.892418] [<ffffffff8108118c>] warn_slowpath_fmt+0x5c/0x80 [176009.892428] [<ffffffff810c3815>] ? finish_wait+0x55/0x70 [176009.892492] [<ffffffffc01fd222>] intel_crtc_wait_for_pending_flips+0x1e2/0x240 [i915] [176009.892500] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60 [176009.892558] [<ffffffffc01fe4a1>] intel_pre_plane_update+0x111/0x140 [i915] [176009.892613] [<ffffffffc01fec72>] intel_atomic_commit+0x352/0x6f0 [i915] [176009.892659] [<ffffffffc005ab8e>] ? drm_atomic_check_only+0x18e/0x590 [drm] [176009.892699] [<ffffffffc005afc7>] drm_atomic_commit+0x37/0x60 [drm] [176009.892720] [<ffffffffc012d909>] drm_atomic_helper_disable_plane+0xa9/0xf0 [drm_kms_helper] [176009.892756] [<ffffffffc004a259>] __setplane_internal+0x169/0x250 [drm] [176009.892794] [<ffffffffc005974a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [176009.892830] [<ffffffffc004e046>] drm_mode_setplane+0x136/0x1b0 [drm] [176009.892859] [<ffffffffc003f742>] drm_ioctl+0x152/0x540 [drm] [176009.892893] [<ffffffffc004df10>] ? drm_plane_check_pixel_format+0x50/0x50 [drm] [176009.892902] [<ffffffff81220c1f>] do_vfs_ioctl+0x29f/0x490 [176009.892909] [<ffffffff8106b544>] ? __do_page_fault+0x1b4/0x400 [176009.892914] [<ffffffff81220e89>] SyS_ioctl+0x79/0x90 [176009.892921] [<ffffffff8182dfb2>] entry_SYSCALL_64_fastpath+0x16/0x71 [176009.892927] ---[ end trace dcdb242875193ae7 ]--- [176009.892930] ------------[ cut here ]------------ [176009.892992] WARNING: CPU: 3 PID: 3425 at /build/linux-a2WvEb/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:3968 intel_crtc_wait_for_pending_flips+0x233/0x240 [i915]() [176009.892994] Removing stuck page flip [176009.892997] Modules linked in: msr ctr ccm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass arc4 iwldvm input_leds joydev mac80211 serio_raw snd_hda_codec_hdmi iwlwifi snd_hda_codec_conexant snd_hda_codec_generic cfg80211 snd_hda_intel lpc_ich snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq thinkpad_acpi snd_seq_device nvram snd_timer snd mac_hid mei_me mei shpchp soundcore ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter [176009.893068] ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter parport_pc ip_tables x_tables ppdev lp parport autofs4 btrfs xor raid6_pq drbg ansi_cprng algif_skcipher af_alg dm_crypt dm_mirror dm_region_hash dm_log hid_generic usbhid hid crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse i915 sdhci_pci sdhci i2c_algo_bit ahci drm_kms_helper libahci syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e drm ptp pps_core fjes video wmi [176009.893125] CPU: 3 PID: 3425 Comm: Xorg Tainted: G W 4.4.0-36-generic #55-Ubuntu [176009.893128] Hardware name: LENOVO 4286CTO/4286CTO, BIOS 8DET50WW (1.20 ) 07/07/2011 [176009.893131] 0000000000000086 00000000319e2a0a ffff88040611faa0 ffffffff813f13b3 [176009.893136] ffff88040611fae8 ffffffffc0262ad8 ffff88040611fad8 ffffffff810810f2 [176009.893142] ffff8800d49be1a8 ffff880035449008 ffff8800d4be0000 ffff8800d49be000 [176009.893147] Call Trace: [176009.893154] [<ffffffff813f13b3>] dump_stack+0x63/0x90 [176009.893162] [<ffffffff810810f2>] warn_slowpath_common+0x82/0xc0 [176009.893167] [<ffffffff8108118c>] warn_slowpath_fmt+0x5c/0x80 [176009.893175] [<ffffffff810c3815>] ? finish_wait+0x55/0x70 [176009.893232] [<ffffffffc01fd273>] intel_crtc_wait_for_pending_flips+0x233/0x240 [i915] [176009.893240] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60 [176009.893296] [<ffffffffc01fe4a1>] intel_pre_plane_update+0x111/0x140 [i915] [176009.893352] [<ffffffffc01fec72>] intel_atomic_commit+0x352/0x6f0 [i915] [176009.893393] [<ffffffffc005ab8e>] ? drm_atomic_check_only+0x18e/0x590 [drm] [176009.893430] [<ffffffffc005afc7>] drm_atomic_commit+0x37/0x60 [drm] [176009.893450] [<ffffffffc012d909>] drm_atomic_helper_disable_plane+0xa9/0xf0 [drm_kms_helper] [176009.893485] [<ffffffffc004a259>] __setplane_internal+0x169/0x250 [drm] [176009.893522] [<ffffffffc005974a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [176009.893557] [<ffffffffc004e046>] drm_mode_setplane+0x136/0x1b0 [drm] [176009.893586] [<ffffffffc003f742>] drm_ioctl+0x152/0x540 [drm] [176009.893620] [<ffffffffc004df10>] ? drm_plane_check_pixel_format+0x50/0x50 [drm] [176009.893627] [<ffffffff81220c1f>] do_vfs_ioctl+0x29f/0x490 [176009.893633] [<ffffffff8106b544>] ? __do_page_fault+0x1b4/0x400 [176009.893638] [<ffffffff81220e89>] SyS_ioctl+0x79/0x90 [176009.893644] [<ffffffff8182dfb2>] entry_SYSCALL_64_fastpath+0x16/0x71 [176009.893648] ---[ end trace dcdb242875193ae8 ]--- [176009.992058] ------------[ cut here ]------------ [176009.992119] WARNING: CPU: 3 PID: 3425 at /build/linux-a2WvEb/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b5/0x1c0 [drm]() [176009.992123] vblank wait timed out on crtc 0 [176009.992126] Modules linked in: msr ctr ccm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass arc4 iwldvm input_leds joydev mac80211 serio_raw snd_hda_codec_hdmi iwlwifi snd_hda_codec_conexant snd_hda_codec_generic cfg80211 snd_hda_intel lpc_ich snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq thinkpad_acpi snd_seq_device nvram snd_timer snd mac_hid mei_me mei shpchp soundcore ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter [176009.992221] ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter parport_pc ip_tables x_tables ppdev lp parport autofs4 btrfs xor raid6_pq drbg ansi_cprng algif_skcipher af_alg dm_crypt dm_mirror dm_region_hash dm_log hid_generic usbhid hid crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse i915 sdhci_pci sdhci i2c_algo_bit ahci drm_kms_helper libahci syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e drm ptp pps_core fjes video wmi [176009.992295] CPU: 3 PID: 3425 Comm: Xorg Tainted: G W 4.4.0-36-generic #55-Ubuntu [176009.992299] Hardware name: LENOVO 4286CTO/4286CTO, BIOS 8DET50WW (1.20 ) 07/07/2011 [176009.992303] 0000000000000286 00000000319e2a0a ffff88040611fad8 ffffffff813f13b3 [176009.992310] ffff88040611fb20 ffffffffc0071b38 ffff88040611fb10 ffffffff810810f2 [176009.992316] ffff8800d49be000 0000000000000000 0000000000000000 00000000001a87f9 [176009.992322] Call Trace: [176009.992337] [<ffffffff813f13b3>] dump_stack+0x63/0x90 [176009.992349] [<ffffffff810810f2>] warn_slowpath_common+0x82/0xc0 [176009.992355] [<ffffffff8108118c>] warn_slowpath_fmt+0x5c/0x80 [176009.992365] [<ffffffff810c3815>] ? finish_wait+0x55/0x70 [176009.992402] [<ffffffffc00412d5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm] [176009.992412] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60 [176009.992493] [<ffffffffc01fed5a>] intel_atomic_commit+0x43a/0x6f0 [i915] [176009.992538] [<ffffffffc005afc7>] drm_atomic_commit+0x37/0x60 [drm] [176009.992561] [<ffffffffc012d909>] drm_atomic_helper_disable_plane+0xa9/0xf0 [drm_kms_helper] [176009.992597] [<ffffffffc004a259>] __setplane_internal+0x169/0x250 [drm] [176009.992635] [<ffffffffc005974a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [176009.992671] [<ffffffffc004e046>] drm_mode_setplane+0x136/0x1b0 [drm] [176009.992700] [<ffffffffc003f742>] drm_ioctl+0x152/0x540 [drm] [176009.992733] [<ffffffffc004df10>] ? drm_plane_check_pixel_format+0x50/0x50 [drm] [176009.992742] [<ffffffff81220c1f>] do_vfs_ioctl+0x29f/0x490 [176009.992749] [<ffffffff8106b544>] ? __do_page_fault+0x1b4/0x400 [176009.992754] [<ffffffff81220e89>] SyS_ioctl+0x79/0x90 [176009.992761] [<ffffffff8182dfb2>] entry_SYSCALL_64_fastpath+0x16/0x71 [176009.992766] ---[ end trace dcdb242875193ae9 ]--- [176010.144062] ------------[ cut here ]------------ [176010.144109] WARNING: CPU: 3 PID: 3425 at /build/linux-a2WvEb/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b5/0x1c0 [drm]() [176010.144111] vblank wait timed out on crtc 0 [176010.144169] Modules linked in: msr ctr ccm bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass arc4 iwldvm input_leds joydev mac80211 serio_raw snd_hda_codec_hdmi iwlwifi snd_hda_codec_conexant snd_hda_codec_generic cfg80211 snd_hda_intel lpc_ich snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq thinkpad_acpi snd_seq_device nvram snd_timer snd mac_hid mei_me mei shpchp soundcore ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter [176010.144210] ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter parport_pc ip_tables x_tables ppdev lp parport autofs4 btrfs xor raid6_pq drbg ansi_cprng algif_skcipher af_alg dm_crypt dm_mirror dm_region_hash dm_log hid_generic usbhid hid crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse i915 sdhci_pci sdhci i2c_algo_bit ahci drm_kms_helper libahci syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e drm ptp pps_core fjes video wmi [176010.144215] CPU: 3 PID: 3425 Comm: Xorg Tainted: G W 4.4.0-36-generic #55-Ubuntu [176010.144216] Hardware name: LENOVO 4286CTO/4286CTO, BIOS 8DET50WW (1.20 ) 07/07/2011 [176010.144221] 0000000000000286 00000000319e2a0a ffff88040611f838 ffffffff813f13b3 [176010.144224] ffff88040611f880 ffffffffc0071b38 ffff88040611f870 ffffffff810810f2 [176010.144227] ffff8800d49be000 0000000000000000 0000000000000000 00000000001a8802 [176010.144228] Call Trace: [176010.144240] [<ffffffff813f13b3>] dump_stack+0x63/0x90 [176010.144248] [<ffffffff810810f2>] warn_slowpath_common+0x82/0xc0 [176010.144252] [<ffffffff8108118c>] warn_slowpath_fmt+0x5c/0x80 [176010.144259] [<ffffffff810c3815>] ? finish_wait+0x55/0x70 [176010.144283] [<ffffffffc00412d5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm] [176010.144287] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60 [176010.144344] [<ffffffffc01fed5a>] intel_atomic_commit+0x43a/0x6f0 [i915] [176010.144377] [<ffffffffc005a937>] ? drm_atomic_add_affected_connectors+0x27/0xf0 [drm] [176010.144406] [<ffffffffc005afc7>] drm_atomic_commit+0x37/0x60 [drm] [176010.144422] [<ffffffffc012ee1f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper] [176010.144450] [<ffffffffc005974a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] [176010.144465] [<ffffffffc0130ff3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper] [176010.144477] [<ffffffffc013106d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [176010.144526] [<ffffffffc0213c0a>] intel_fbdev_set_par+0x1a/0x60 [i915] [176010.144531] [<ffffffff8147477f>] ? fb_set_var+0x2ef/0x460 [176010.144535] [<ffffffff814746c6>] fb_set_var+0x236/0x460 [176010.144539] [<ffffffff810b4d39>] ? update_curr+0x79/0x160 [176010.144544] [<ffffffff8146a9bf>] fbcon_blank+0x30f/0x350 [176010.144547] [<ffffffff810ab149>] ? ttwu_do_wakeup+0x19/0xe0 [176010.144554] [<ffffffff81501cb3>] do_unblank_screen+0xd3/0x1a0 [176010.144558] [<ffffffff814f6d89>] complete_change_console+0x59/0xe0 [176010.144562] [<ffffffff814f7520>] vt_ioctl+0x710/0x12f0 [176010.144585] [<ffffffffc003f779>] ? drm_ioctl+0x189/0x540 [drm] [176010.144591] [<ffffffff814ea7ef>] tty_ioctl+0x35f/0xc40 [176010.144597] [<ffffffff811c012d>] ? handle_mm_fault+0xcdd/0x1820 [176010.144602] [<ffffffff81220c1f>] do_vfs_ioctl+0x29f/0x490 [176010.144606] [<ffffffff8106b544>] ? __do_page_fault+0x1b4/0x400 [176010.144609] [<ffffffff81220e89>] SyS_ioctl+0x79/0x90 [176010.144614] [<ffffffff8182dfb2>] entry_SYSCALL_64_fastpath+0x16/0x71 [176010.144617] ---[ end trace dcdb242875193aea ]--- As I wrote before, the only way to get back to a functional system is to go through a suspend/resume cycle: sudo pm-suspend (system is entered sleep mode; wakeup) No more traces since. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1583817 Title: WARNING: CPU: 1 PID: 865 at /home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b0/0x1c0 [drm] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1583817/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
