Interestingly I also see this error when I just saved my settings to switch back from LightDM to GDM - was seeing if this had been fixed or not. I choose GDM, save my choice and get these errors in the terminal.
dpkg-maintscript-helper: warning: environment variable DPKG_MAINTSCRIPT_NAME missing dpkg-maintscript-helper: warning: environment variable DPKG_MAINTSCRIPT_PACKAGE missing -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/834592 Title: System hangs during boot with "Checking battery state" on screen Status in “lightdm” package in Ubuntu: Confirmed Bug description: After some digging it appears that lightdm isn't starting properly. One fix appears to be Ctrl+Alt+F1,user and password and startx but I fixed it by switching to using GDM - sudo dpkg-reconfigure -plow gdm. This happened after I ran updates on Wednesday of this week. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/834592/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
