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            <b><a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [skl dp-mst] oops in atomic commit"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=96781#c55">Comment # 55</a>
              on <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [skl dp-mst] oops in atomic commit"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=96781">bug 96781</a>
              from <span class="vcard"><a class="email" href="mailto:wferi@niif.hu" title="Ferenc Wágner <wferi@niif.hu>"> <span class="fn">Ferenc Wágner</span></a>
</span></b>
        <pre>OK, compiled and booted the 2017y-03m-28d-08h-54m-35s UTC integration manifest.
There are several hangs during bootup:

<span class="quote">> [   11.996006] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:30:pipe A] flip_done timed out
> [   12.100021] ------------[ cut here ]------------
> [   12.100021] WARNING: CPU: 0 PID: 5 at drivers/gpu/drm/drm_irq.c:1242 drm_wait_one_vblank+0x154/0x1a0 [drm]
> [   12.100021] vblank wait timed out on crtc 0
> [   12.100021] Modules linked in: hid_generic(E) usbhid(E) hid(E) arc4(E) psmouse(E) ata_piix(E) ahci(E) libahci(E) libata(E) scsi_mod(E) ath5k(E) mac80211(E) ath(E) cfg80211(E) rfkill(E) i915(E) tg3(E) ptp(E) pps_core(E) prime_numbers(E) libphy(E) i2c_algo_bit(E) drm_kms_helper(E) thermal(E) uhci_hcd(E) ehci_pci(E) ehci_hcd(E) video(E) drm(E) button(E) usbcore(E)
> [   12.100021] CPU: 0 PID: 5 Comm: kworker/u4:0 Tainted: G            E   4.11.0-rc4+ #3
> [   12.100021] Hardware name: Acer            Aspire 2920                    /Calado                         , BIOS V1.13           02/14/2008
> [   12.100021] Workqueue: events_unbound async_run_entry_fn
> [   12.100021] Call Trace:
> [   12.100021]  ? dump_stack+0x5c/0x77
> [   12.100021]  ? __warn+0xc4/0xe0
> [   12.100021]  ? warn_slowpath_fmt+0x5f/0x80
> [   12.100021]  ? finish_wait+0x3c/0x80
> [   12.100021]  ? drm_wait_one_vblank+0x154/0x1a0 [drm]
> [   12.100021]  ? remove_wait_queue+0x60/0x60
> [   12.100021]  ? intel_get_load_detect_pipe+0x5ea/0x640 [i915]
> [   12.100021]  ? intel_tv_detect+0x156/0x520 [i915]
> [   12.100021]  ? drm_helper_probe_single_connector_modes+0x2fc/0x550 [drm_kms_helper]
> [   12.100021]  ? drm_setup_crtcs+0x7d/0xa10 [drm_kms_helper]
> [   12.100021]  ? check_preempt_wakeup+0xeb/0x200
> [   12.100021]  ? drm_fb_helper_initial_config+0x79/0x420 [drm_kms_helper]
> [   12.100021]  ? try_to_wake_up+0x54/0x460
> [   12.100021]  ? intel_fbdev_initial_config+0x14/0x30 [i915]
> [   12.100021]  ? async_run_entry_fn+0x34/0x160
> [   12.100021]  ? process_one_work+0x15e/0x420
> [   12.100021]  ? worker_thread+0x65/0x4b0
> [   12.100021]  ? rescuer_thread+0x390/0x390
> [   12.100021]  ? kthread+0x104/0x140
> [   12.100021]  ? kthread_park+0x80/0x80
> [   12.100021]  ? ret_from_fork+0x26/0x40
> [   12.100021] ---[ end trace 4fb69e1dcd9a9df7 ]---
> [   12.235090] ------------[ cut here ]------------
> [   12.235090] WARNING: CPU: 0 PID: 5 at drivers/gpu/drm/drm_irq.c:1242 drm_wait_one_vblank+0x154/0x1a0 [drm]
> [   12.235090] vblank wait timed out on crtc 0
> [   12.235090] Modules linked in: hid_generic(E) usbhid(E) hid(E) arc4(E) psmouse(E) ata_piix(E) ahci(E) libahci(E) libata(E) scsi_mod(E) ath5k(E) mac80211(E) ath(E) cfg80211(E) rfkill(E) i915(E) tg3(E) ptp(E) pps_core(E) prime_numbers(E) libphy(E) i2c_algo_bit(E) drm_kms_helper(E) thermal(E) uhci_hcd(E) ehci_pci(E) ehci_hcd(E) video(E) drm(E) button(E) usbcore(E)
> [   12.235090] CPU: 0 PID: 5 Comm: kworker/u4:0 Tainted: G        W   E   4.11.0-rc4+ #3
> [   12.235090] Hardware name: Acer            Aspire 2920                    /Calado                         , BIOS V1.13           02/14/2008
> [   12.235090] Workqueue: events_unbound async_run_entry_fn
> [   12.235090] Call Trace:
> [   12.235090]  ? dump_stack+0x5c/0x77
> [   12.235090]  ? __warn+0xc4/0xe0
> [   12.235090]  ? warn_slowpath_fmt+0x5f/0x80
> [   12.235090]  ? finish_wait+0x3c/0x80
> [   12.235090]  ? drm_wait_one_vblank+0x154/0x1a0 [drm]
> [   12.235090]  ? remove_wait_queue+0x60/0x60
> [   12.235090]  ? intel_pre_plane_update+0x10c/0x190 [i915]
> [   12.235090]  ? intel_atomic_commit_tail+0x9f/0xed0 [i915]
> [   12.235090]  ? __queue_work+0x13c/0x440
> [   12.235090]  ? intel_atomic_commit+0x452/0x4f0 [i915]
> [   12.235090]  ? intel_release_load_detect_pipe+0x58/0xa0 [i915]
> [   12.235090]  ? intel_tv_detect+0x374/0x520 [i915]
> [   12.235090]  ? drm_helper_probe_single_connector_modes+0x2fc/0x550 [drm_kms_helper]
> [   12.235090]  ? drm_setup_crtcs+0x7d/0xa10 [drm_kms_helper]
> [   12.235090]  ? check_preempt_wakeup+0xeb/0x200
> [   12.235090]  ? drm_fb_helper_initial_config+0x79/0x420 [drm_kms_helper]
> [   12.235090]  ? try_to_wake_up+0x54/0x460
> [   12.235090]  ? intel_fbdev_initial_config+0x14/0x30 [i915]
> [   12.235090]  ? async_run_entry_fn+0x34/0x160
> [   12.235090]  ? process_one_work+0x15e/0x420
> [   12.235090]  ? worker_thread+0x65/0x4b0
> [   12.235090]  ? rescuer_thread+0x390/0x390
> [   12.235090]  ? kthread+0x104/0x140
> [   12.235090]  ? kthread_park+0x80/0x80
> [   12.235090]  ? ret_from_fork+0x26/0x40
> [   12.235090] ---[ end trace 4fb69e1dcd9a9df8 ]---
> [   12.295126] fbcon: inteldrmfb (fb0) is primary device
> [   13.189124] Console: switching to colour frame buffer device 160x50
> [   13.208494] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device</span >

and several more which I don't include here, but each has
drm_helper_probe_single_connector_modes and intel_tv_detect on its call trace.
Please tell if there's anything more I could do here.</pre>
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