I'm also running into this issue on two of my machines. Both are Asus X53U laptops running almost 100% stock versions of Ubuntu 12.04. I've installed nothing but chrome and gnome-panel on the machines. This manifests as users not being able to login using lightdm to the machines.
I see an identical error in .xsession-errors as reported above: Changing the interpreter from sh to bash in lightdm-session allows users to login to the machines. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/962270 Title: /usr/sbin/lightdm-session: 34: [: Linux: unexpected operator To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/962270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs