Hi,I am installing debian amd64 on a Lenovo Y50 with UltraHD 3840x2160 resolution. I use today's debian-testing...iso from http://cdimage.debian.org/cdimage/daily-builds/daily/arch-latest/amd64/iso-cd.
I chose graphical install. I am at step entering root password, still the trackpad mouse has not been working: it is at the center of the screen, but cannot be moved.
Cheers, -- Eugen