There was a link on a popular Facebook 'Ubuntu fan page' to the site today. Somebody commented to ask "Why can not use Launchpad username and password??".

Of course you can use your launchpad account - by entering your launchpad profile URL in the OpenID login – e.g. https://launchpad.net/~fred-bloggs

In fact we could use the Launchpad Single Sign On (aka Launchpad sign on) as used by most official Ubuntu webpages, because Launchpad Single Sign On is as I understand it, effectively an OpenID provider.

It would be wonderful if by the Ubuntu Stack Exchange official launch there was an obvious option on the login page to use this 'standard Ubuntu account'. Without this, we may alienate many potential users of the site.

Edit: I asked about this at Meta StackOverflow

  • 1
    Is there a way to ask SE folks on how to help us out with this? I think we're having a chicken and the egg problem because Ubuntu contributors have lp id's and using launchpad.net/~username is not obvious. Commented Aug 21, 2010 at 21:37
  • That's what I was hoping to achieve by opening this question. If we can all vote it up to show SE it's important to us that would be useful. I think it should be possible to use Launchpad in the same was Google, Yahoo and Facebook are shown on the login screen - you click a 'launchpad' button and the cleverness somehow finds your openID url for you.
    – 8128
    Commented Aug 23, 2010 at 6:38
  • 2
    Bumpity Bumpity Bump!
    – badp
    Commented Oct 10, 2010 at 18:17

5 Answers 5


I think adding "Launchpad" as one of the big icons (next to Google icon) for the log in will help alleviate this and will likely be the best option. Once that option is clicked it should prompt for their launchpad username.


Launchpad's OpenID auth works a little like Google's implementation, insofar as you don't enter your Launchpad username on the client site, but instead the Launchpad Login Service returns a username.

Getting it added to the list should be straightforward, and is a great idea.


This has been implemented as noted by Jeff on Meta StackOverflow


The LP login should be replaced by Ubuntu SSO (Single Sign On) as the latter service will replace the former one.

Source: https://login.ubuntu.com/+description and https://login.ubuntu.com/+faq


Here's how to form the OpenID url:


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