Thiago, this bug may be caused by having two Xorg instances (the user session and the unlock screen which runs in another VT) accessing the graphics driver. And up until now, only the nvidia driver was reported to be part of the problem.
Please check the logs files in /var/log/lightdm for any hints. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1760068 Title: Wrong resolution at unlock screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1760068/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
