First, there is a big Login form. But this is a trap. If I try this one, this will not work.

It works for me with the correct credentials (LDAP, not SUL). Fixing T116142: Phabricator login page does not show Welcome text / "Click button below" text anymore would be good to make this clear to users though.

As for the rest of this post, clearly something went very wrong, because this is not the usual login process at all (for all devices that I have tried, nothing iOS-based), none of your suggestions are useful in this case.

I am supposed to guess this.

That is a regression - see T116142 where it's covered.

I land on a page that asks for my nickname and my password.

I cannot reproduce this problem when being logged in via a mediawiki.org / wikipedia.org SUL account. Can you please provide a screenshot of that page?

Now, I repro this mess, and in it I encounter this issue:

T132268: Phabricator (on iPhone) gives login error and incorrectly says that I have disabled cookies

About the dead end, here is a screen photo:

In T131697#2181744, @Aklapper wrote:

I land on a page that asks for my nickname and my password.

I cannot reproduce this problem when being logged in via a mediawiki.org / wikipedia.org SUL account. Can you please provide a screenshot of that page?

I repro the madness, here is a screen photo of that page:

In T131697#2193078, @Nnemo wrote:

About the dead end, here is a screen photo:

I can reproduce this using Safari on iOS 9.2.1 with Safari set to run in incognito mode. (Not sure if incognito is important for this or not.)

• Phabricator redirects to www.mediawiki.org to get OAuth approval.
• I'm not logged into my SUL account so I land on the login page for www.mediawiki.org (not m.mediawiki.org).
• After entering my user/password I see the redirect to login.wikimedia.org happen followed by a redirect to m.mediawiki.org (not www.mediawiki.org where I entered my auth credentials).
• m.mediawiki.org shows the page from the screenshot, but I can tell from the site chrome that I actually am properly authenticated with my SUL account.
• At this point if I back up to phabricator and start over things work as expected:
  • I'm redirected to www.mediawiki.org for the OAuth grant dialog (which is styled horribly on mobile by the desktop skin but that's a different problem).
  • I click "Allow" and redirect back to phabricator
  • Phabricator drops me on the external account registration screen (testing with a different account than the one I have associated with my LDAP phab account).

Part of the problem here is likely due to starting on www.mediawiki..org and then ending on m.mediawiki.org after the handshake with login.wikimedia.org. I'm not sure if this is new behavior that SessionManager introduced or if that's the way that things have always worked. I've always authenticated with phabricator using my LDAP credentials from my phone in the past.

This issue is about the scenario of the description. Not showing a SUL dialog may be a part of the issue, or an explanation...

In T131697#2193389, @bd808 wrote:

In T131697#2193078, @Nnemo wrote:

About the dead end, here is a screen photo:

I can reproduce this using Safari on iOS 9.2.1 with Safari set to run in incognito mode. (Not sure if incognito is important for this or not.)

Thank you. In Safari I was not in incognito mode.

I can reproduce this using Safari on iOS 9.2.1 with Safari set to run in incognito mode. (Not sure if incognito is important for this or not.)

Eight years later, I'm curious if this is still an issue on a more recent system. Guess I need to find someone with devices™ at a Hackathon or such. :P