Hi, the missing symbol should be in libGLdispatch.so.0, please verify:
$ nm -D /usr/lib/x86_64-linux-gnu/libGLdispatch.so.0 | grep tls $ ls -la /usr/lib/x86_64-linux-gnu/libGLdispatch.so* Are there any stale versions of libGLdispatch.so* on your system? You are working on a merged-usr environment - could this somehow be related? Andreas