Thanks for reporting. This is what I feared ... I'm doing things a little different from nvidia-settings, but it's probable that disper's implementation is not fully complete. This will require quite some work in studying nvidia documentation and nvidia-settings source, and implementing it in disper again. Don't hold your breath just yet, but I'll try to look into it somewhere in the future.
Thanks for reporting. This is what I feared ... I'm doing things a little different from nvidia-settings, but it's probable that disper's implementation is not fully complete. This will require quite some work in studying nvidia documentation and nvidia-settings source, and implementing it in disper again. Don't hold your breath just yet, but I'll try to look into it somewhere in the future.