Also,
https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_525/shard-apl8/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-c-frame-sequence.html

(kms_pipe_crc_basic:12692) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:147:
(kms_pipe_crc_basic:12692) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:12692) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:12692) CRITICAL: error: 15733 != 15735
Subtest nonblocking-crc-pipe-C-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3419/shard-apl1/igt@kms_pipe_crc_basic@read-crc-pipe-b-frame-sequence.html

(kms_pipe_crc_basic:3793) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:147:
(kms_pipe_crc_basic:3793) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:3793) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:3793) CRITICAL: error: 3310 != 3311
Subtest read-crc-pipe-B-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4074/fi-hsw-4770r/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b-frame-sequence.html


(kms_pipe_crc_basic:3976) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:147:
(kms_pipe_crc_basic:3976) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:3976) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:3976) CRITICAL: error: 1109 != 1110
Subtest nonblocking-crc-pipe-B-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3585/shard-glkb1/igt@kms_pipe_crc_basic@read-crc-pipe-c-frame-sequence.html

(kms_pipe_crc_basic:1692) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:147:
(kms_pipe_crc_basic:1692) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:1692) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:1692) CRITICAL: error: 692 != 694
Subtest read-crc-pipe-C-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3636/shard-glkb6/igt@kms_pipe_crc_basic@read-crc-pipe-a-frame-sequence.html
	
(kms_pipe_crc_basic:1698) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:147:
(kms_pipe_crc_basic:1698) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:1698) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:1698) CRITICAL: error: 9249 != 9251
Subtest read-crc-pipe-A-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4143/shard-glkb6/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-a-frame-sequence.html

(kms_pipe_crc_basic:1332) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:147:
(kms_pipe_crc_basic:1332) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:1332) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:1332) CRITICAL: error: 1210 != 1211
Subtest nonblocking-crc-pipe-A-frame-sequence failed.

Last seen  IGT_4074: 2017-12-19 / 293 runs ago

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4234/shard-hsw4/igt@kms_pipe_crc_basic@read-crc-pipe-a-frame-sequence.html


(kms_pipe_crc_basic:16129) CRITICAL: Test assertion failure function test_read_crc_for_output, file kms_pipe_crc_basic.c:147:
(kms_pipe_crc_basic:16129) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:16129) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:16129) CRITICAL: error: 16453 != 16454
Subtest read-crc-pipe-A-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4361/fi-cfl-s2/igt@kms_pipe_crc_basic@read-crc-pipe-a-frame-sequence.html

(kms_pipe_crc_basic:4180) CRITICAL: Test assertion failure function test_read_crc_for_output, file ../tests/kms_pipe_crc_basic.c:140:
(kms_pipe_crc_basic:4180) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:4180) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:4180) CRITICAL: error: 18041 != 18042
Subtest read-crc-pipe-A-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3965/fi-skl-6770hq/igt@kms_pipe_crc_basic@read-crc-pipe-b-frame-sequence.html

(kms_pipe_crc_basic:4116) CRITICAL: Test assertion failure function test_read_crc_for_output, file ../tests/kms_pipe_crc_basic.c:140:
(kms_pipe_crc_basic:4116) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:4116) CRITICAL: Last errno: 9, Bad file descriptor
(kms_pipe_crc_basic:4116) CRITICAL: error: 17863 != 17864
Subtest read-crc-pipe-B-frame-sequence failed.

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_4005/fi-cfl-s3/igt@kms_pipe_crc_basic@read-crc-pipe-c-frame-sequence.html
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_4005/fi-cfl-s3/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-a-frame-sequence.html
https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4390/fi-cfl-s3/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-c-frame-sequence.html
	

(kms_pipe_crc_basic:3947) CRITICAL: Test assertion failure function test_read_crc_for_output, file ../tests/kms_pipe_crc_basic.c:140:
(kms_pipe_crc_basic:3947) CRITICAL: Failed assertion: crcs[j].frame + 1 == crcs[j + 1].frame
(kms_pipe_crc_basic:3947) CRITICAL: Last errno: 9, Bad file descriptor

Some related failure:

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_4298_8/fi-cfl-s3/igt@kms_pipe_crc_basic@hang-read-crc-pipe-b.html

(kms_pipe_crc_basic:3906) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:370:
(kms_pipe_crc_basic:3906) igt_debugfs-CRITICAL: Failed assertion: !mismatch
(kms_pipe_crc_basic:3906) igt_debugfs-CRITICAL: Last errno: 9, Bad file descriptor
Subtest hang-read-crc-pipe-B failed.

Used to happen multiple times per week, now not seen since CI_DRM_4298_8 (3 months, 2 weeks / 1797 runs ago). Closing!