Neo Lee

Try followings:
sudo apt install libxcb-icccm4
sudo apt install libxcb-image0
sudo apt install libxcb-keysyms1
sudo apt install libxcb-render-util0
sudo apt install libxcb-cursor0
sudo apt-get install -y libxcb-xinerama0-dev

Everything works well with the latest build of 539 except that AOV should be designated as Color not Vector3 in Karma Material Builder.

jsmack

ifree
But uv is output per polygon rather than per geometry with source type intrinsic, and none with source type primvar.

right, the ray:uv output is the face parametric. For the primvar, use 'st' or check your spreadsheet for the actual primvar name.

Thanks, jsmack. Using 'st' solved the problem.