(In reply to Duane Voth from comment #8)
> $ weston --use-pixman

Thanks for the hint. I hadn't tried this one.

The workaround dismisses the error message but, unfortunately, doesn't enable
hardware acceleration, at least for me:

> $ glxinfo
>   Extended renderer info (GLX_MESA_query_renderer):
>      Vendor: VMware, Inc. (0xffffffff)
>      Device: llvmpipe (LLVM 7.0, 128 bits) (0xffffffff)
>      Version: 18.2.5
>      Accelerated: no
>      Video memory: 1982MB
>      Unified memory: no