[Mesa-dev] [Bug 105179] DiRT Rally: wrong frames appear during camera transition

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105179

            Bug ID: 105179
           Summary: DiRT Rally: wrong frames appear during camera
                    transition
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: gr.muench at gmail.com
        QA Contact: mesa-dev at lists.freedesktop.org

Created attachment 137483
  --> https://bugs.freedesktop.org/attachment.cgi?id=137483&action=edit
big fps drop at the time the bug appears

The issue can be watched in Benchmark mode. The camera changes multiple times
from outside to inside of the car during the benchmark run. Between the
transition from one view to another you see the start point of the track for a
short time (<1sec). There is also a stall and the framerate is dropping from
over 100fps to 40fps. 
The start point is probably frame one and gets for unknown reason displayed
where it should be long gone from cards video memory.
Just to clarify:
In the moment of the transition, you see the frame of the track start point and
not the car and the trees surrounding which it actually should show.

Normally I would fill this as a RadeonSI issue but from reading:
https://lists.freedesktop.org/archives/mesa-dev/2018-February/185134.html

"except I got a few ltc errors in DiRT
Rally. Unclear if it's related to this patch though. Could be a missing
flush somewhere."

..I think it is a general mesa issue, except Im wrong here.

OpenGL renderer string: AMD Radeon HD 7900 Series (TAHITI / DRM 3.21.0 /
4.14.0-2-drm-next-dc-git, LLVM 7.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 18.1.0-devel
(git-a572ec2efe)
OpenGL core profile shading language version string: 4.50

-- 
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: <https://lists.freedesktop.org/archives/mesa-dev/attachments/20180220/96e18b7f/attachment-0001.html>