* '''Are you using Wayland?'''
** Clipboard functionality is not compatible with Wayland. If you are using it you need to disable it for the clipboard to work.
=== Followed Installation Instructions but Looking Glass Still Doesn't Launch ===
At times and depending on your distribution circumstances can cause Looking Glass to still not run. Below is a list of known issues that can prevent Looking Glass from running properly.
==== AppArmor ====
AppArmor is a security application that can prevent Looking Glass from running. How to add security exceptions may vary on your distribution:
===== Debian(Ubuntu) =====
Start by opening the file <code>/etc/apparmor.d/abstractions/libvirt-qemu</code>. Now locate and edit the following lines to represent how they appear in the example:
# for usb access
/dev/bus/usb/** rw,
/etc/udev/udev.conf r,
/sys/bus/ r,
/sys/class/ r,
/run/udev/data/* rw,
/dev/input/* rw,
# Looking Glass
/dev/shm/looking-glass rw,