I reset my login in password on two desktop computers using the GUI at System Settings > User Accounts.
One computer gave no grief whatsoever, but the other computer the one I use as primary turned in to a nightmare.
Had to go to reset the login password using the CD. Finally got back into that computer.
BUT, I kept getting a pop up unlock login keyring on boot and when starting Chrome.
I found a solution for resetting the keyring using the terminal:
rm ~/.local/share/keyrings -fr
The unlock login keyring pop up went away on boot.
BUT, when I open Chrome I still get the pop up every single time.
Although I cancel the unlock login keyring when Chrome opens all the sign ons still work in Chrome, so it seems unnecessary.
I discovered that there is a program called Passwords and Keys, within which I tried to change the Login > Passwords.
In the pop up Enter the old password for login keyring, whether I put in the old or new login password I keep getting
The original password was incorrect
The computer that is giving me grief came with 13.10, I used a CD to set the OS to 12.04 LTS right after I got the computer in December 2013. Upgraded using a CD to 14.04 LTS a year ago ~ May 2014.
The old password I changed has been the password since the computer was new.
Absolutely have to have a login password.