Step "Tails Greeter has applied all settings" is fragile

Originally created by @bertagaz on #13470 (Redmine)

The test suite sometimes fails after clicking on the login button of the Greeter. The next loginctl test to see if the X session is opened can’t find one apart the Gdm one.

It happened:

• 3 times so far in July
• 6 times in June
• 18 in May
• 5 in April
• 13 in March
• 12 in February
• 13 in January

But all this failures might not be due to the same reasons.

Maybe we need to raise a bit the waiting time for the session to open. Or there’s a bug in the Tails X session opening, or that’s #11816 (closed) having being closed a bit too fast. This needs investigation.

Feature Branch: https://salsa.debian.org/tails-team/tails/merge_requests/33

Parent Task: #10288 (closed)

Related issues

• Related to #12289 (closed)
• Related to #11816 (closed)