[    8.199827] ------------[ cut here ]------------
[    8.199863] WARNING: CPU: 1 PID: 192 at drivers/gpu/drm/i915/intel_display.c:1571 assert_pch_hdmi_disabled+0x101/0x110 [i915]()
[    8.199863] IBX PCH hdmi port still using transcoder B
[    8.199879] Modules linked in: i915 video drm_kms_helper drm snd_hda_codec_hdmi intel_agp snd_hda_codec_realtek snd_hda_codec_generic psmouse serio_raw intel_gtt i2c_algo_bit e1000e ptp pps_core gpio_ich lpc_ich acpi_cpufreq fb_sys_fops syscopyarea sysfillrect sysimgblt i2c_dev i2c_i801 wmi i2c_core processor thermal tpm_tis tpm mei_me mei snd_hda_intel snd_hda_codec fjes ehci_pci irqbypass snd_hda_core agpgart 8250_fintek snd_hwdep snd_pcm snd_timer evdev ehci_hcd crct10dif_pclmul crc32_pclmul crc32c_intel snd button soundcore loop
[    8.199881] CPU: 1 PID: 192 Comm: kworker/u16:9 Not tainted 4.4.0 #2
[    8.199881] Hardware name: Acer Veriton M490G/Veriton M490G, BIOS P01-A4         08/10/2010
[    8.199885] Workqueue: events_unbound async_run_entry_fn
[    8.199886]  ffffffffc04cd0a8 ffff88023175b830 ffffffff815fa06f ffff88023175b878
[    8.199887]  ffff88023175b868 ffffffff8108c132 ffff8800b5310000 00000000000e1150
[    8.199888]  0000000000000000 ffff8800b67f0000 0000000000000000 ffff88023175b8c8
[    8.199889] Call Trace:
[    8.199894]  [<ffffffff815fa06f>] dump_stack+0x44/0x55
[    8.199898]  [<ffffffff8108c132>] warn_slowpath_common+0x82/0xc0
[    8.199899]  [<ffffffff8108c1bc>] warn_slowpath_fmt+0x4c/0x50
[    8.199919]  [<ffffffffc0449608>] ? gen5_read32+0x28/0xa0 [i915]
[    8.199937]  [<ffffffffc0449608>] ? gen5_read32+0x28/0xa0 [i915]
[    8.199957]  [<ffffffffc045ccc1>] assert_pch_hdmi_disabled+0x101/0x110 [i915]
[    8.199977]  [<ffffffffc04626df>] ironlake_crtc_disable+0x1df/0x7b0 [i915]
[    8.199997]  [<ffffffffc046b37f>] intel_atomic_commit+0xff/0x13c0 [i915]
[    8.200003]  [<ffffffffc0204a7e>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[    8.200006]  [<ffffffffc02042f0>] ? drm_atomic_set_crtc_for_connector+0x20/0x90 [drm]
[    8.200008]  [<ffffffffc0204eb7>] drm_atomic_commit+0x37/0x60 [drm]
[    8.200012]  [<ffffffffc0130a6f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper]
[    8.200014]  [<ffffffffc0132c23>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[    8.200015]  [<ffffffffc0132c9d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[    8.200035]  [<ffffffffc0481c0a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[    8.200038]  [<ffffffff81664380>] fbcon_init+0x570/0x5f0
[    8.200040]  [<ffffffff816d499a>] visual_init+0xca/0x130
[    8.200041]  [<ffffffff816d6601>] do_bind_con_driver+0x1c1/0x3a0
[    8.200042]  [<ffffffff816d6b19>] do_take_over_console+0x149/0x1a0
[    8.200043]  [<ffffffff816602b7>] do_fbcon_takeover+0x57/0xb0
[    8.200044]  [<ffffffff81664df8>] fbcon_event_notify+0x658/0x750
[    8.200046]  [<ffffffff810a905a>] notifier_call_chain+0x4a/0x70
[    8.200047]  [<ffffffff810a9337>] __blocking_notifier_call_chain+0x47/0x60
[    8.200048]  [<ffffffff810a9366>] blocking_notifier_call_chain+0x16/0x20
[    8.200050]  [<ffffffff8166a52b>] fb_notifier_call_chain+0x1b/0x20
[    8.200051]  [<ffffffff8166c820>] register_framebuffer+0x200/0x330
[    8.200053]  [<ffffffffc0132f1d>] drm_fb_helper_initial_config+0x25d/0x3f0 [drm_kms_helper]
[    8.200073]  [<ffffffffc04826fb>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[    8.200074]  [<ffffffff810aaaa7>] async_run_entry_fn+0x37/0xe0
[    8.200076]  [<ffffffff810a2db7>] process_one_work+0x147/0x460
[    8.200076]  [<ffffffff810a3118>] worker_thread+0x48/0x490
[    8.200077]  [<ffffffff810a30d0>] ? process_one_work+0x460/0x460
[    8.200079]  [<ffffffff810a8339>] kthread+0xc9/0xe0
[    8.200080]  [<ffffffff810a8270>] ? kthread_worker_fn+0x160/0x160
[    8.200082]  [<ffffffff81c4666f>] ret_from_fork+0x3f/0x70
[    8.200083]  [<ffffffff810a8270>] ? kthread_worker_fn+0x160/0x160
[    8.200084] ---[ end trace 5d7add31f697705d ]---