sddm启动root登陆kde By HKL, Tuesd

[Users]
# Default $PATH for logged in users 
DefaultPath=/bin:/usr/bin

# Comma-separated list of shells.
# Users with these shells as their default won't be listed
HideShells=/usr/sbin/nologin,/bin/false

# Comma-separated list of users that should not be listed
HideUsers=sync
#通过HideShells和HideUsers隐藏应用用户

# Maximum user id for displayed users
MaximumUid=60000

# Minimum user id for displayed users
MinimumUid=0
#主要是这一行MinimumUid修改为0后才能使用root用户

# Remember the session of the last successfully logged in user
RememberLastSession=true

# Remember the last successfully logged in user
RememberLastUser=true

#auth    required        pam_succeed_if.so user != root quiet_success
auth    sufficient      pam_succeed_if.so user ingroup nopasswdlogin