[Bug 104193] [radeonsi] The Witcher 3 freezes the system with no attachments calls & transform feedback Wine patch

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104193

            Bug ID: 104193
           Summary: [radeonsi] The Witcher 3 freezes the system with no
                    attachments calls & transform feedback Wine patch
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: shtetldik at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 136068
  --> https://bugs.freedesktop.org/attachment.cgi?id=136068&action=edit
The Witcher 3: rotfiends radeonsi freeze

Wine has an issue with distorted monsters in The Witcher 3. Józef Kucia
identified the problem as follows:

* wined3d doesn't support draw calls with no attachments,
* wined3d tries to map transform feedback buffers while transform feedback is
paused.

See https://bugs.winehq.org/show_bug.cgi?id=43872#c8

He provided a patch:
https://bugs.winehq.org/attachment.cgi?id=59848&action=diff&context=patch&collapsed=&headers=1&format=raw

However applying it, is causing a system freeze (with radeonsi) after such kind
of monsters are encountered in the game and fighting them for some time. See
attached savegame for example with rotfiends.

Interestingly, Józef Kucia couldn't reproduce this freeze with radeon driver,
so it appears to be radeonsi specific.

You can apply the above Wine patch to Wine git master to test it (I build Wine
using just that patch, and one staging patch for performance: 

https://raw.githubusercontent.com/wine-compholio/wine-staging/master/patches/wined3d-buffer_create/0001-wined3d-Do-not-pin-large-buffers.patch

My last test environment:

OpenGL renderer string: AMD Radeon (TM) RX 480 Graphics (POLARIS10 / DRM 3.18.0
/ 4.13.0-1-amd64, LLVM 5.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.4.0-devel
(git-b926da241a)

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