New subject: [Bug 53215] d3d11:d3d11 - test_fractional_viewports() fails in the TestBot VMs

21 Jun 2022

      https://bugs.winehq.org/show_bug.cgi?id=53215

            Bug ID: 53215
           Summary: d3d11:d3d11 - test_fractional_viewports() fails in the
                    TestBot VMs
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: directx-d3d
          Assignee: wine-bugs(a)winehq.org
          Reporter: fgouget(a)codeweavers.com
      Distribution: ---

d3d11:d3d11 - test_fractional_viewports() fails in the TestBot VMs:

d3d11.c:28276: Test failed: Got texcoord {8.43750119e-001, 1.56249881e-001},
expected {8.43750000e-001, 1.56250000e-001} at (3, 3), offset 1.25000000e-001.
d3d11.c:28276: Test failed: Got texcoord {8.71093690e-001, 1.28906310e-001},
expected {8.71093750e-001, 1.28906250e-001} at (3, 3), offset 1.56250000e-002.
d3d11.c:28276: Test failed: Got texcoord {7.51953065e-001, 2.48046935e-001},
expected {7.51953125e-001, 2.48046875e-001} at (3, 3), offset 4.92187500e-001.

https://test.winehq.org/data/patterns.html#d3d11:d3d11

These failures:
* Don't happen on Debian 11 + Intel / KDE
* Happen on Debian 11 + QXL + single-monitor
* Happen on Debian 11 + QXL + multi-monitor
* Happen on Debian Testing + QXL + multi-monitor

So they seems to be related to the VMs QXL GPU.

Note that despite being systematic these failures could cause false positives
due to the test multi-threading (see bug 53212).

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[Bug 53215] New: d3d11:d3d11 - test_fractional_viewports() fails in the TestBot VMs

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