On latest mesa git (17.3-dev) WarThunder freezes with vsync activated.

The main problem: 
a system consumes significantly more power (+90W in my case), with vsync
deactivated.

Switching back to mesa 17.2-rc5 or disabling vsync (vblanc=0), are solutions to
make it work, atm.

Here my system specs:
(glxinfo |grep OpenGL)

OpenGL vendor string: X.Org
OpenGL renderer string: AMD Radeon (TM) R9 380 Series (TONGA / DRM 3.19.0 /
4.13.0-rc5+, LLVM 6.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.3.0-devel
(git-46a8c4ef81)
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 17.3.0-devel (git-46a8c4ef81)
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.3.0-devel
(git-46a8c4ef81)
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
OpenGL ES profile extensions: