I have only had Ubuntu 14.04 installed for a couple weeks. A couple days ago, whenever I would return from suspend, the password would not be accepted. However, if I restarted my computer, typing the exact same password would work just fine. Any possible way to figure out what is causing this issue?

  • I have the same problem. If I switch from the X tty, e.g. [Ctrl]+[Alt]+6 and then switch back [Ctrl]+[Alt]+7, I can login without problem. – Captain Giraffe Dec 5 '14 at 11:34

My comment also works as a partial answer.

After you come back from suspend do the following:

  1. [Ctrl]+[Alt]+F6 to leave the X session. You don't have to type anything in to the terminal that appears.

  2. [Ctrl]+[Alt]+F7 to come back to the X session. Now you can input the password and it validates properly.

It's not a fix, but a lot easier than rebooting.

  • When I am in the log in screen, [Ctrl]+[Alt]+6 doesn't do anything. I found if I switch accounts and type my password in, it says it failed but then the screen goes blank and after a couple seconds I'm logged in. – rcon197 Dec 6 '14 at 17:10
  • @rcon197 Ooops, that should be F6 and F7 respectively. – Captain Giraffe Dec 6 '14 at 17:14

For me, only switching to the text console and then back to the graphical one has not been sufficient. On top of this, I had to log in at the text console and shutdown the fingerprint-helper process from there. After switching back to the X-server console, I was able to continue using my session.

For details, please see my answer on Fingerprint GUI breaks lock screen after suspend.

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