locate r600_dri.so /usr/lib/i386-linux-gnu/dri/r600_dri.so /usr/lib/x86_64-linux-gnu/dri/r600_dri.so Installed: sudo apt-get install libgl1-mesa-dri-dbg addr2line 0x168a2f -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so /build/buildd/mesa-10.1.3/build/dri/src/mesa/../../../../src/gallium/auxiliary/util/u_inlines.h:151 addr2line 0x168a34 -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so /build/buildd/mesa-10.1.3/build/dri/src/mesa/../../../../src/gallium/auxiliary/util/u_inlines.h:151