New Lineage 15.1 & Gamma v23 builds, with second screen support (including my build of BoredSigns) for the H910 AT&T V20:Lineage 15.1: https://drive.google.com/open?id=1YE...-BBnJHsuKPSnCE Gamma v23 kernel: https://drive.google.com/open?id=1zU...vJJTyN2s7yUXam As linked above, I got Gamma to compile with second screen changes successfully. I was building the wrong branch! Apparently oxavelar has another branch called gamma-integration, and I was using the integration branch. I forked his project & merged his Makefiles, so it is easier to build (with the linaro 6.4.1 toolchain).