GLX/EGL X11 clients of Xmir get software rendered (LLVMpipe)

[Daniel van Vugt]

GLX clients of Xmir get software rendered (LLVMpipe). No idea why...

$ glxinfo | grep OpenGL
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.6, 256 bits)
OpenGL version string: 3.0 Mesa 10.6.3
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:

$ glmark2
** GLX does not support GLX_EXT_swap_control or GLX_MESA_swap_control!
** Failed to set swap interval. Results may be bounded above by refresh rate.
=======================================================
    glmark2 2014.03+git20150611.fa71af2d
=======================================================
    OpenGL Information
    GL_VENDOR: VMware, Inc.
    GL_RENDERER: Gallium 0.4 on llvmpipe (LLVM 3.6, 256 bits)
    GL_VERSION: 3.0 Mesa 10.6.3
=======================================================

Still, LLVMpipe rocks and things are generally smooth.

WORKAROUND:
$ sudo chown $USER /dev/dri/*

[Daniel van Vugt (vanvugt)]

Found the problem. It's just the GLX/EGL clients don't have correct permissions configured to access /dev/dri/*

If you run your GLX apps with sudo, it works and you get full hardware acceleration.

[Daniel van Vugt (vanvugt)]

Slightly better:

$ sudo glxinfo | grep OpenGL
Failed to open BO for returned DRI2 buffer (100x100, dri2 fake front buffer, named -1).
This is likely a bug in the X Server that will lead to a crash soon.
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.6.3
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
Failed to open BO for returned DRI2 buffer (100x100, dri2 fake front buffer, named -1).
This is likely a bug in the X Server that will lead to a crash soon.
OpenGL version string: 3.0 Mesa 10.6.3
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
Failed to open BO for returned DRI2 buffer (100x100, dri2 fake front buffer, named -1).
This is likely a bug in the X Server that will lead to a crash soon.
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 10.6.3
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:

[Daniel van Vugt (vanvugt)]

Correct permissions on /dev/dri to solve this bug are set up as part of the Ubuntu login process. And I've just verified Unity8 does it too.

So there's nothing to fix.