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      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - intel driver crashes with kernel 5.1.2 when booting with external monitor connected to Mini-Displayport"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=110700#c4">Comment # 4</a>
              on <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - intel driver crashes with kernel 5.1.2 when booting with external monitor connected to Mini-Displayport"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=110700">bug 110700</a>
              from <span class="vcard"><a class="email" href="mailto:cool2000@speed.1s.fr" title="cool2000@speed.1s.fr">cool2000@speed.1s.fr</a>
</span></b>
        <pre>Hi,
A have the similar error with linux kernel 5.1.9 generic (Ubuntu build)
Motherboard ASUS Z170I PRO GAMING, BIOS 0403 09/29/2015 with Display-port 4K
monitor connected.

[    2.966444] ------------[ cut here ]------------
[    2.966445] vblank wait timed out on crtc 0
[    2.966464] WARNING: CPU: 0 PID: 257 at drivers/gpu/drm/drm_vblank.c:1092
drm_wait_one_vblank+0x174/0x180 [drm]
[    2.966464] Modules linked in: i915(+) mxm_wmi i2c_algo_bit psmouse
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm e1000e(+) ahci
libahci wmi video
[    2.966468] CPU: 0 PID: 257 Comm: systemd-udevd Not tainted
5.1.9-050109-generic #201906111132
[    2.966468] Hardware name: System manufacturer System Product Name/Z170I PRO
GAMING, BIOS 0403 09/29/2015
[    2.966475] RIP: 0010:drm_wait_one_vblank+0x174/0x180 [drm]
[    2.966476] Code: 0b e9 29 ff ff ff 48 8d 75 a8 4c 89 ff e8 f4 11 9a dc 45
85 ed 0f 85 09 ff ff ff 44 89 e6 48 c7 c7 70 59 36 c0 e8 be 3e 95 dc <0f> 0b e9
f3 fe ff ff e8 70 3b 95 dc 0f 1f 44 00 00 55 8b b7 90 00
[    2.966477] RSP: 0018:ffffb44b41fcb740 EFLAGS: 00010286
[    2.966477] RAX: 0000000000000000 RBX: ffffa0f132d20000 RCX:
ffffffff9e268488
[    2.966478] RDX: 0000000000000001 RSI: 0000000000000096 RDI:
0000000000000247
[    2.966478] RBP: ffffb44b41fcb798 R08: 00000000000002ca R09:
0000000000000004
[    2.966479] R10: 0000000000000000 R11: 0000000000000001 R12:
0000000000000000
[    2.966479] R13: 0000000000000000 R14: 0000000000000001 R15:
ffffa0f140a50808
[    2.966480] FS:  00007f0f40809680(0000) GS:ffffa0f153c00000(0000)
knlGS:0000000000000000
[    2.966480] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.966480] CR2: 00007f0f407cb1dc CR3: 000000043307e004 CR4:
00000000003606f0
[    2.966481] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[    2.966481] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[    2.966482] Call Trace:
[    2.966485]  ? wait_woken+0x80/0x80
[    2.966513]  skl_update_crtcs+0x1cf/0x300 [i915]
[    2.966537]  intel_atomic_commit_tail+0x3ab/0xee0 [i915]
[    2.966560]  ? intel_atomic_commit_ready+0x4d/0x50 [i915]
[    2.966579]  ? __i915_sw_fence_complete+0x10e/0x1a0 [i915]
[    2.966602]  intel_atomic_commit+0x2b8/0x2f0 [i915]
[    2.966610]  drm_atomic_commit+0x4a/0x50 [drm]
[    2.966632]  intel_modeset_init+0xc73/0xfb0 [i915]
[    2.966651]  i915_driver_load+0xd0e/0x1460 [i915]
[    2.966653]  ? _cond_resched+0x19/0x30
[    2.966672]  i915_pci_probe+0x46/0x60 [i915]
[    2.966674]  local_pci_probe+0x47/0x80
[    2.966675]  pci_device_probe+0x11c/0x1a0
[    2.966677]  really_probe+0xfe/0x3b0
[    2.966678]  driver_probe_device+0xba/0x100
[    2.966679]  device_driver_attach+0x59/0x60
[    2.966680]  __driver_attach+0x8f/0x150
[    2.966680]  ? device_driver_attach+0x60/0x60
[    2.966681]  bus_for_each_dev+0x79/0xc0
[    2.966683]  ? kmem_cache_alloc_trace+0x1ba/0x1d0
[    2.966684]  driver_attach+0x1e/0x20
[    2.966684]  bus_add_driver+0x151/0x1f0
[    2.966685]  ? 0xffffffffc05d7000
[    2.966686]  driver_register+0x70/0xc0
[    2.966686]  ? 0xffffffffc05d7000
[    2.966688]  __pci_register_driver+0x57/0x60
[    2.966706]  i915_init+0x5a/0x5d [i915]
[    2.966708]  do_one_initcall+0x4a/0x1c4
[    2.966709]  ? __vfree+0x22/0x60
[    2.966710]  ? _cond_resched+0x19/0x30
[    2.966711]  ? kmem_cache_alloc_trace+0x164/0x1d0
[    2.966713]  do_init_module+0x60/0x220
[    2.966714]  load_module+0x16f9/0x1970
[    2.966715]  __do_sys_finit_module+0xbd/0x120
[    2.966716]  ? __do_sys_finit_module+0xbd/0x120
[    2.966717]  __x64_sys_finit_module+0x1a/0x20
[    2.966718]  do_syscall_64+0x5a/0x110
[    2.966719]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    2.966720] RIP: 0033:0x7f0f40313839
[    2.966721] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89
f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
[    2.966721] RSP: 002b:00007ffe30cd0de8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[    2.966722] RAX: ffffffffffffffda RBX: 000055eca335e650 RCX:
00007f0f40313839
[    2.966722] RDX: 0000000000000000 RSI: 00007f0f3fff2145 RDI:
0000000000000012
[    2.966723] RBP: 00007f0f3fff2145 R08: 0000000000000000 R09:
00007ffe30cd0f00
[    2.966723] R10: 0000000000000012 R11: 0000000000000246 R12:
0000000000000000
[    2.966723] R13: 000055eca33427e0 R14: 0000000000020000 R15:
000055eca335e650
[    2.966724] ---[ end trace ac05d76dc859767d ]---

and

[    3.150408] ------------[ cut here ]------------
[    3.150408] pipe_off wait timed out
[    3.150461] WARNING: CPU: 3 PID: 295 at
drivers/gpu/drm/i915/intel_display.c:1045 intel_disable_pipe+0x15d/0x170 [i915]
[    3.150461] Modules linked in: hid_generic(+) usbhid hid uas usb_storage
i915 mxm_wmi i2c_algo_bit psmouse drm_kms_helper syscopyarea sysfillrect
sysimgblt fb_sys_fops drm e1000e(+) ahci libahci wmi video
[    3.150465] CPU: 3 PID: 295 Comm: kworker/u16:7 Tainted: G        W        
5.1.9-050109-generic #201906111132
[    3.150465] Hardware name: System manufacturer System Product Name/Z170I PRO
GAMING, BIOS 0403 09/29/2015
[    3.150468] Workqueue: events_unbound async_run_entry_fn
[    3.150491] RIP: 0010:intel_disable_pipe+0x15d/0x170 [i915]
[    3.150492] Code: e0 5b 41 5c 41 5d 41 5e 5d c3 31 f6 e8 3c af ff ff 48 8d
65 e0 5b 41 5c 41 5d 41 5e 5d c3 48 c7 c7 fe e3 55 c0 e8 a5 59 7f dc <0f> 0b eb
b0 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44
[    3.150492] RSP: 0018:ffffb44b424438b0 EFLAGS: 00010282
[    3.150493] RAX: 0000000000000000 RBX: ffffa0f132d20000 RCX:
0000000000000000
[    3.150493] RDX: 0000000000000000 RSI: 0000000000000002 RDI:
0000000000000202
[    3.150494] RBP: ffffb44b424438d0 R08: 0000000000000000 R09:
0000000000022700
[    3.150494] R10: 00000022a70fb73e R11: 00000000000308dc R12:
0000000000070008
[    3.150494] R13: 0000000000000000 R14: ffffa0f1333cd800 R15:
ffffa0f132d20000
[    3.150495] FS:  0000000000000000(0000) GS:ffffa0f153cc0000(0000)
knlGS:0000000000000000
[    3.150495] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.150496] CR2: 00007f0f405e76e8 CR3: 000000014300e001 CR4:
00000000003606e0
[    3.150496] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[    3.150496] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[    3.150497] Call Trace:
[    3.150519]  haswell_crtc_disable+0xf1/0x140 [i915]
[    3.150541]  intel_atomic_commit_tail+0x24c/0xee0 [i915]
[    3.150562]  intel_atomic_commit+0x2b8/0x2f0 [i915]
[    3.150571]  drm_atomic_commit+0x4a/0x50 [drm]
[    3.150575]  restore_fbdev_mode_atomic+0x1bf/0x1d0 [drm_kms_helper]
[    3.150578]  restore_fbdev_mode+0x4e/0x160 [drm_kms_helper]
[    3.150580]  ? _cond_resched+0x19/0x30
[    3.150583]  drm_fb_helper_restore_fbdev_mode_unlocked+0x4e/0xa0
[drm_kms_helper]
[    3.150586]  drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[    3.150607]  intel_fbdev_set_par+0x1a/0x50 [i915]
[    3.150609]  fbcon_init+0x4a4/0x5e0
[    3.150610]  visual_init+0xd5/0x130
[    3.150611]  do_bind_con_driver+0x1e8/0x2e0
[    3.150612]  do_take_over_console+0x129/0x1a0
[    3.150613]  do_fbcon_takeover+0x5c/0xb0
[    3.150614]  fbcon_event_notify+0x787/0x7b9
[    3.150615]  notifier_call_chain+0x4c/0x70
[    3.150616]  blocking_notifier_call_chain+0x43/0x60
[    3.150617]  fb_notifier_call_chain+0x1b/0x20
[    3.150618]  register_framebuffer+0x25c/0x350
[    3.150621]  __drm_fb_helper_initial_config_and_unlock+0x2c0/0x480
[drm_kms_helper]
[    3.150624]  drm_fb_helper_initial_config+0x35/0x40 [drm_kms_helper]
[    3.150644]  intel_fbdev_initial_config+0x18/0x30 [i915]
[    3.150646]  async_run_entry_fn+0x3c/0x150
[    3.150647]  process_one_work+0x20f/0x410
[    3.150648]  worker_thread+0x34/0x400
[    3.150649]  kthread+0x120/0x140
[    3.150649]  ? process_one_work+0x410/0x410
[    3.150650]  ? __kthread_parkme+0x70/0x70
[    3.150651]  ret_from_fork+0x35/0x40
[    3.150652] ---[ end trace ac05d76dc859767e ]---</pre>
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