Same issue on a Dell Latitude D6510. In Utopic and Trusty. I have seen this from more than a half year ago.
If I lock my screen, sometimes there is no password field to unlock it. If I go back to the terminal (Ctrl-Alt-F1), then that message is showing up. My solution is to login on the terminal and then killing compiz with: pkill -9 compiz When I switch back to my locked screen (Ctrl-Alt-F7) I have a password field and I can unlock my screen. I have done a reinstall (on 2014-11-15) to Trusty, because Utopic does not work very well on this laptop. Issues with video playing and editing and slow keyboard performance (autotype in Keepassx is too fast and characters are not typed in the right order; in Google Chome typing is sometimes impossible; mssh is not working). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1354046 Title: no 3d acceleration with error [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1354046/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs