igt@kms_cursor_legacy@flip-vs-cursor-crc* - fail - Test assertion failure function flip_vs_cursor_crc, Failed assertion: kmstest_get_vblank(display->drm_fd, pipe, 0) == vblank_start

http://gfx-ci.igk.intel.com/cibuglog-ng/testresult/1734518763?query_key=a4d9a61fd1af5b9704fd7d56abf5b671f1e5ccef

Starting subtest: flip-vs-cursor-crc-atomic
(kms_cursor_legacy:1493) CRITICAL: Test assertion failure function flip_vs_cursor_crc, file ../../../usr/src/igt-gpu-tools/tests/kms_cursor_legacy.c:1629:
(kms_cursor_legacy:1493) CRITICAL: Failed assertion: kmstest_get_vblank(display->drm_fd, pipe, 0) == vblank_start
(kms_cursor_legacy:1493) CRITICAL: error: 16097 != 16096
Subtest flip-vs-cursor-crc-atomic failed.
**** DEBUG ****
(kms_cursor_legacy:1493) igt_kms-DEBUG: plane B.3: Setting property "alpha" to 0xffff/65535
(kms_cursor_legacy:1493) igt_kms-DEBUG: plane B.3: Setting property "FB_DAMAGE_CLIPS" to 0x0/0
(kms_cursor_legacy:1493) igt_kms-DEBUG: plane B.3: Setting property "SCALING_FILTER" to 0x0/0
(kms_cursor_legacy:1493) igt_kms-DEBUG: display:     populating plane data: B.4, fb 0
(kms_cursor_legacy:1493) igt_kms-DEBUG: plane B.4: Setting property "SRC_X" to 0x0/0
(kms_cursor_legacy:1493) igt_kms-DEBUG: plane B.4: Setting property "SRC_Y" to 0x0/0
(kms_cursor_legacy:1493) igt_kms-DEBUG: plane B.4: Setting property "SRC_W" to 0x0/0
(kms_cursor_legacy:1493) igt_kms-DEBUG: plane B.4: Setting property "SRC_H" to 0x0/0