Hi,
I have installed fedora 25 in my laptop. Installation worked and I worked about 3 days without any problems.
What happened today was:
I logon to the computer with userid and used su in the terminal to install some softwares.
After that I logout and try to logon as root to the computer. It did not allow me to login. I am certain I used the accurate password. The I tried with my userid and it did not work either.

This is the second time it happened to me. I installed the system new this time because the same thing happened earlier.
Is this a bug in fedora?

I appreciate any help.

Phguna

it you are not going to inform us as to WHAT YOU DID

then there is really nothing we can do to help

What did you DO and install?????

I thought Fedora didn't allow root login ... been a Fedora user for years and never tried. At least not to a GUI.
The (normal) user not being able to is a different matter altogether. Have you run smart over that disk ?.

booting to the terminal and loging in as root ( in the terminal) - yes
and once loged in as a normal user then opening a terminal and using " su - " to become root in the terminal -- yes

a gui root login
you can but then after you set a nasty color scheme ( thing nauseating headache color scheme)

undo that pam hack or the ssdm workaround

if you do not there can be all kinds of PROBLEMS