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xvfb is supposed to let me run X programs in a headless environment. But when I run xvfb-run glxgears, I get:

libGL error: failed to load driver: swrast
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
Error: couldn't get an RGB, Double-buffered visual

When I run LIBGL_DEBUG=verbose xvfb-run glxgears, I get:

libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
libGL error: failed to load driver: swrast
Error: couldn't get an RGB, Double-buffered visual

I'm running stock Lubuntu 13.10 x64 with Intel Ivy Bridge integrated graphics. libgl1-mesa-dri is installed and /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so exists. Running as root doesn't help.

What's going wrong?

Alex Henrie
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1 Answers1

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Just if anyone finds this old question, there is a solution to that mentioned in a bug report linked from another unix.stackexchange question. It was enough to change the default server parameters (-s/--server-args) from -screen 0 640x480x8 to -screen 0 640x480x24, i.e. anything with the 24 color depth.

Community
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wodny
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