[Bug 39550] Unable to login back into login dialog box in "New Login"

[आशीष शुक्ला "Wah Java !!"]

Public bug reported:

Affects: gdm (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed


Description:
I'm currently logged in with user 'X'. Now, used "New Login" to login
with user 'Y', without logging out from 'X'. The GDM screen is
displayed. I entered my user id i.e. 'Y' and Y's password there and
logged in successfully. After finishing my work with user 'Y', I logged
out and logon dialog box for user 'X' is displayed. When I tried to
enter my password for 'X', it rejected.

I don't know what is wrong. Or what I'm missing.
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Unable to login back into login dialog box in "New Login"
https://launchpad.net/malone/bugs/39550