I installed a ubuntu in a virtual machine, a few days ago with no problem, two days after the lock screen automatically, the password is invalid, the password I'm sure there is no problem, ask god to help have a look, thanks

Normal login interface is like this:



Password invalid interface:

CodePudding user response:

Have a look at your/etc/shadow and/etc/gshadow property right, and the/sbin/unix_chkpwd, also check the check/etc/PAM. D/gnome screensaver

CodePudding user response:

If account username is root