This is how Unix systems are supposed to behave. The ~lightdm/.gvfs filesystem is a private FUSE-mounted filesystem that belongs to the lightdm user, so a normal user shouldn't be able to access it. The same thing would happen if you had a GVFS filesystem open as yourself and another user (who was were logged in to the machine via ssh of via the switch-user feature) ran df -h.
I certainly see why this text being dumped to stderr on a common command like df -h feels like an error, though. This behavior runs deep into the design of the Linux (and all Unix) kernel, but I'd be interested in any ideas you have about how to modify the behavior to be more suitable. ** Changed in: bash (Ubuntu) Status: New => Opinion -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/867806 Title: df -h permission denied error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bash/+bug/867806/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs