I have a laptop asus with windows 10 and debian 9. efi grub like bootloader. I wish boot it both of them without password. The problem is lightdm: with autologin the desktop environment dosn't finish load. Precisely the screen is black. I have to move mouse or to press some keys for starting the session. It seems like on suspension. I read all file log without finding something wrong.
I followed these guide too: