2

I use Mate as my desktop environment and I recently upgraded from 16.04 to 18.04.

Since the upgrade, I now have two lock screens. If I lock my screen (Ctrl-Alt-L), I get the expected Mate screensaver, but sometimes when I unlock it I get an additional light blue lock screen, just containing a password field.

I end up having to unlock both to get back to my desktop. The last time this happened, the blue screen didn't show a password field and I had to reboot my machine.

I think the blue lock screen is being fired from a timer, somewhere. If I leave my computer locked for long enough, the blue screen will be waiting for me. However if I briefly lock and unlock my machine, only the Mate screensaver appears.

Any ideas what this is? After researching some similar issues, I tried removing gnome-screensaver, but it hasn't fixed anything.

This question is related, however I upgraded rather than a fresh install. Also I have two lock screens, not three, and I've already removed gnome-screensaver.

  • Hello and welcome to AskUbuntu! Everything points to gnome-screensaver being the culprit. Have you rebooted after uninstalling it? – Mr Shunz Sep 18 '18 at 9:08
  • @MrShunz Yup, that was the problem :-) – Duncan Jones Sep 18 '18 at 11:20
3

As per comments, gnome-screensaver is interfering and should be uninstalled.

After uninstalling, you should reboot your system as the screensaver is still running in memory.

Probably a logout is enough, but I'm not sure if gnome-screensaver gets killed on logout, so a reboot is safer.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.