[Mesa-dev] [Bug 90901] DrawElements regression: "Detected variance between two invariant values"

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Jun 8 19:09:03 PDT 2015


            Bug ID: 90901
           Summary: DrawElements regression: "Detected variance between
                    two invariant values"
           Product: Mesa
           Version: 10.6
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: brian.wilson at intel.com
        QA Contact: mesa-dev at lists.freedesktop.org

Hardware: BSW RVP

Bug detailed description
The following drawElements tests appear to have regressed between Mesa 10.5.0
and 10.6.0 with the same failure signature on BSW:
- dEQP-GLES3.functional.shaders.invariance.highp.loop_0
- dEQP-GLES3.functional.shaders.invariance.highp.loop_1
- dEQP-GLES3.functional.shaders.invariance.lowp.loop_0
- dEQP-GLES3.functional.shaders.invariance.lowp.loop_1
- dEQP-GLES3.functional.shaders.invariance.mediump.loop_0
- dEQP-GLES3.functional.shaders.invariance.mediump.loop_1

Cases where the test passed:
- ChromeOS on BSW w/ mid-November commit of Mesa (on platforms Haswell,
Baytrail, Broadwell and Braswell - not sure of the commit on this)
- Upstream Linux (bsw system) using Mesa commit from 2014-11-24; commit ID:

Cases where the test failed:
- ChromeOS on BSW w/ mesa commit we were trying to move to (c2a0600 i965: Don't
set NirOptions for stages that will use the vec4 backend)
- Upstream Linux (bsw system) using the mesa commit we were trying to move to
- Upstream Linux (bsw system) using current ToT mesa (as of 5/20/15)

Reproduce Steps
1. Run indicated drawElements tests with indicated version of Mesa or ToT Mesa
2. Compare test results against older (mid-November) Mesa commit

Expected Result
No failure with current ToT Mesa

Actual Result
Expecting only green or background colored pixels. Invalid pixels found
(fragments from first render pass found). Variance detectedDetected variance
between two invariant values.

You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/mesa-dev/attachments/20150609/93b387cf/attachment.html>

More information about the mesa-dev mailing list