[Bug 102996] [BAT] igt at kms_pipe_crc_basic@nonblocking-crc-pipe-a - drmWaitVBlank(drm_fd, &wait_vbl) == 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102996

--- Comment #2 from Marta Löfstedt <marta.lofstedt at intel.com> ---
Here is a similar pattern:
dmesg-warn on:
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3174/fi-ctg-p8600/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b.html
and:
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3174/fi-ctg-p8600/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b-frame-sequence.html

then incomplete at:
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3174/fi-ctg-p8600/igt@kms_pipe_crc_basic@read-crc-pipe-b.html

This time we also this a WARNING after 
[  431.072209] [drm:drm_atomic_helper_wait_for_flip_done] *ERROR* [CRTC:46:pipe
B] flip_done timed out
[  444.384178] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR*
[CRTC:46:pipe B] flip_done timed out
[  444.488160] vblank wait timed out on crtc 1
[  444.488190] ------------[ cut here ]------------
[  444.488199] WARNING: CPU: 0 PID: 3608 at drivers/gpu/drm/drm_vblank.c:1066
drm_wait_one_vblank+0x196/0x1a0
[  444.488203] Modules linked in: vgem i915 coretemp lpc_ich
snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core
snd_pcm e1000e mei_me ptp mei pps_core prime_numbers
[  444.488280] CPU: 0 PID: 3608 Comm: kms_pipe_crc_ba Tainted: G     U  W      
4.14.0-rc3-CI-CI_DRM_3174+ #1
[  444.488283] Hardware name: LENOVO 74591P0/74591P0, BIOS 6DET28WW (1.05 )
07/30/2008
[  444.488286] task: ffff88012844a8c0 task.stack: ffffc90000fc4000
[  444.488290] RIP: 0010:drm_wait_one_vblank+0x196/0x1a0
[  444.488292] RSP: 0018:ffffc90000fc7948 EFLAGS: 00010296
[  444.488298] RAX: 000000000000001f RBX: ffff8801286d0000 RCX:
0000000000000006
[  444.488300] RDX: 0000000000001617 RSI: ffffffff81d0e20c RDI:
ffffffff81cc2046
[  444.488303] RBP: ffffc90000fc79a0 R08: 0000000000000000 R09:
0000000000000001
[  444.488306] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000001
[  444.488308] R13: 0000000000000238 R14: 0000000000000000 R15:
000000000000098f
[  444.488311] FS:  00007fd7d00e1a40(0000) GS:ffff88013bc00000(0000)
knlGS:0000000000000000
[  444.488314] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  444.488317] CR2: 00007fd1f557b780 CR3: 000000012fc1c000 CR4:
00000000000406f0
[  444.488320] Call Trace:
[  444.488327]  ? wait_woken+0x90/0x90
[  444.488366]  intel_pre_plane_update+0xef/0x140 [i915]
[  444.488404]  intel_atomic_commit_tail+0xe3/0xbf0 [i915]
[  444.488446]  intel_atomic_commit+0x21f/0x2b0 [i915]
[  444.488454]  drm_atomic_commit+0x4b/0x50
[  444.488459]  restore_fbdev_mode_atomic+0x193/0x1f0
[  444.488472]  restore_fbdev_mode+0x32/0x120
[  444.488477]  drm_fb_helper_restore_fbdev_mode_unlocked.part.19+0x2a/0x80
[  444.488482]  drm_fb_helper_set_par+0x43/0x70
[  444.488517]  intel_fbdev_set_par+0x1a/0x70 [i915]
[  444.488523]  fbcon_init+0x59b/0x620
[  444.488531]  visual_init+0xd6/0x130
[  444.488536]  do_bind_con_driver+0x1cf/0x3c0
[  444.488545]  do_unbind_con_driver+0x1b0/0x210
[  444.488554]  store_bind+0xbb/0x1b0
[  444.488561]  dev_attr_store+0x18/0x30
[  444.488566]  sysfs_kf_write+0x45/0x60
[  444.488571]  kernfs_fop_write+0x124/0x1c0
[  444.488577]  __vfs_write+0x28/0x130
[  444.488581]  ? rcu_read_lock_sched_held+0x7a/0x90
[  444.488585]  ? rcu_sync_lockdep_assert+0x2f/0x60
[  444.488589]  ? __sb_start_write+0x108/0x200
[  444.488596]  vfs_write+0xcb/0x1c0
[  444.488602]  SyS_write+0x49/0xb0
[  444.488609]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  444.488612] RIP: 0033:0x7fd7ce5b9670
[  444.488615] RSP: 002b:00007ffe8bb9e7a8 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[  444.488620] RAX: ffffffffffffffda RBX: ffffffff81493a03 RCX:
00007fd7ce5b9670
[  444.488623] RDX: 0000000000000002 RSI: 000055764b1809c8 RDI:
0000000000000009
[  444.488626] RBP: ffffc90000fc7f88 R08: 000055764ccdff93 R09:
0000000000000020
[  444.488628] R10: 0000000000000073 R11: 0000000000000246 R12:
000055764ccdff93
[  444.488631] R13: 000055764b180976 R14: 000055764b1809ac R15:
000055764ccdff20
[  444.488637]  ? __this_cpu_preempt_check+0x13/0x20
[  444.488646] Code: c0 e9 23 ff ff ff 48 8b 7d a8 48 8d 75 b0 e8 f2 03 ac ff
45 85 f6 0f 85 12 ff ff ff 44 89 e6 48 c7 c7 b0 73 ce 81 e8 2b 5c ae ff <0f> ff
e9 fc fe ff ff 0f 1f 00 66 66 66 66 90 55 8b b7 08 01 00 
[  444.488797] ---[ end trace ac6a6ca98408a28a ]---

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