Thank you for your bug report, there was an issue with that version of lightdm, 1.7.6-0ubuntu2 got uploaded yesterday with a fix and 1.7.7-0ubuntu1 got rolled out today which includes the fix as well, could you update and see if that fix the problem for you?
Thank you for your bug report, there was an issue with that version of lightdm, 1.7.6-0ubuntu2 got uploaded yesterday with a fix and 1.7.7-0ubuntu1 got rolled out today which includes the fix as well, could you update and see if that fix the problem for you?