Ubuntu 16.04 3D acceleration crashes unity.

[tunka]

Hello,

I'm trying to enable 3D acceleration in Virtualbox 5.2.8 r121009 (Qt5.6.2). Currently, both 3D and 2D acceleration are disabled. When I run

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$ /usr/lib/nux/unity_support_test -p

, I see he following:

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$ /usr/lib/nux/unity_support_test -p
OpenGL vendor string:   VMware, Inc.
OpenGL renderer string: llvmpipe (LLVM 5.0, 256 bits)
OpenGL version string:  3.0 Mesa 17.2.8

Not software rendered:    no
Not blacklisted:          yes
GLX fbconfig:             yes
GLX texture from pixmap:  yes
GL npot or rect textures: yes
GL vertex program:        yes
GL fragment program:      yes
GL vertex buffer object:  yes
GL framebuffer object:    yes
GL version is 1.4+:       yes

Unity 3D supported:       no
$

When I reboot and enable 3D acceleration, Unity crashes. I don't see any window decorations nor the taskbar at the top. When running unity_support_test, I see:

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$ /usr/lib/nux/unity_support_test -p
OpenGL vendor string:   Humper
OpenGL renderer string: Chromium
OpenGL version string:  2.1 Chromium 1.9

Not software rendered:    yes
Not blacklisted:          yes
GLX fbconfig:             yes
GLX texture from pixmap:  yes
GL npot or rect textures: yes
GL vertex program:        yes
GL fragment program:      yes
GL vertex buffer object:  yes
GL framebuffer object:    yes
GL version is 1.4+:       yes

Unity 3D supported:       yes
$

The only error message I can find is:

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Apr 16 10:35:37 box1 kernel: [   35.036253] compiz-config-p[3621]: segfault at 0 ip 00007fb63189ad6f sp 00007ffe20c01270 error 4 in libcompizconfig.so.0.0.0[7fb631872000+52000]

My host is Windows 10 on a Thinkpad P50 with both Intel & Quadro graphics.

Any idea why Unity is crashing and what I can try to resolve it?

[tunka]

I also tried with test build Version 5.2.9 r121870 (Qt5.6.2). Same issue.