Screen Lock rejects password

[Jim McQuiston]

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Sarangan Thuraisingham wrote:
> Peter Cockriell wrote:
> [...]
> 
>> I had to leave my desk for a moment so I locked my screen ... and now
>> it's rejecting my password.  Anyone have any thoughts on this?  I know
>> I can reset the password through grub, but I'd prefer to understand
>> why this has happened and how I can prevent the problem.
> 
> 
> Ok if your XSession was locked, did you try unlocking it with your
> normal login password. Do you have multiple accounts on this computer,
> if so are you using the right password for the right user? If you are
> confident that you are doing everything right, then can try the following.
> 
> You can switch to the first virtual terminal by pressing
> CTRL+ALT+SHIFT+F1 then login using the same username and password as
> your current xsession. If you can then you are login password is working
> and there is something wrong with screen lock. But if you can't login,
> then you have changed your password while playing with samba or other
> settings. Then the solution would be to try the passwords that you think
> you set for samba.
> 
I have a similar problem with this in Kubuntu. You did not mention
whether you were using KDE or Gnome. If you are using Gnome, please feel
free to disregard the rest of this email. If you are using KDE please
read on.

KDE screensavers make use of a program called kcheckpass to authenticate
the user upon deactivating the screensaver. If you type kcheckpass at
the command prompt, you will be prompted for your user password. If
kcheckpass correctly authenticates you, you will be returned to the
command prompt with no message. If kcheckpass cannot authenticate you,
you will be notified with a login failed message. Give this a test.

If kcheckpass fails to authenticate you, use passwd at the command
prompt to change your password and then try kcheckpass again. I will bet
that kcheckpass will authenticate you with no problem and the
screensaver deactivation will work just fine.

- --
 Jim McQuiston

Registered Linux User #375957
 "When the going gets weird, the weird turn pro." -- Hunter S.Thompson
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