Created attachment 105518 [details]
dmesg-3.16.1-7.g90bc0f1-desktop-gsraytrace.log

GL_RENDERER   = Gallium 0.4 on AMD RV730
GL_VERSION    = 3.0 Mesa 10.4.0-devel (git-5598458)
GL_VENDOR     = X.Org

GShader thing?

mesa-demos/glsl> ./vsraytrace 
ATTENTION: default value of option vblank_mode overridden by environment.
GL_RENDERER = Gallium 0.4 on AMD RV730
47.590482 FPS (238 frames in 5.001000 seconds)
62.325210 FPS (312 frames in 5.006000 seconds)
65.407555 FPS (329 frames in 5.030000 seconds)

mesa-demos/glsl> ./fsraytrace 
ATTENTION: default value of option vblank_mode overridden by environment.
GL_RENDERER = Gallium 0.4 on AMD RV730
503.000000 FPS (2515 frames in 5.000000 seconds)
626.800000 FPS (3134 frames in 5.000000 seconds)
577.600000 FPS (2888 frames in 5.000000 seconds)

mesa-demos/glsl> ./gsraytrace 
ATTENTION: default value of option vblank_mode overridden by environment.
GL_RENDERER = Gallium 0.4 on AMD RV730

ESC                 = exit demo
left mouse + drag   = rotate camera

0.044960 FPS (1 frames in 22.242000 seconds)
0.047201 FPS (1 frames in 21.186000 seconds)

ESC / CNTRL+C (several/hundred times)

=> 2 times switching between blank (black) full screen (console) and desktop
(KDE 4.13.3) before the system comes back

NO, no LLVM this time... (Michel?)

Maybe related: bug 76394