[Bug 100184] New: [BAT] [SKL] kms_cursor_legacy/2x*vs-flip-legacy failures

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100184

            Bug ID: 100184
           Summary: [BAT] [SKL] kms_cursor_legacy/2x*vs-flip-legacy
                    failures
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: dorota.czaplejewicz at collabora.co.uk
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 130199
  --> https://bugs.freedesktop.org/attachment.cgi?id=130199&action=edit
2x-cursor-vs-flip-legacy log

Kernel drm-tip: 2017y-03m-13d-16h-06m-45s, config 2327.
CPU: Celeron(R) CPU G3900
GPU: 00:02.0 0300: 8086:1902 (rev 06) (prog-if 00 [VGA controller])

Tests fail about 10% of the time:

(kms_cursor_legacy:2860) CRITICAL: Test assertion failure function
two_screens_cursor_vs_flip, file kms_cursor_legacy.c:1237:
(kms_cursor_legacy:2860) CRITICAL: Failed assertion: shared[child] >
vrefresh[child]*target[child] / 2
(kms_cursor_legacy:2860) CRITICAL: completed 1843 cursor updated in a period of
30 flips, we expect to complete approximately 3840 updates, with the threshold
set at 1920

Affected:
2x-cursor-vs-flip-legacy
2x-long-cursor-vs-flip-legacy

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