Comment 6 for bug 1517615

This problem will occur if running vivid with the overlay PPA [1]. We can't SRU this change to vivid since this will break users not using the PPA. There is an option to put a modified version of LightDM in the PPA, but I'm not going to do that as that will create a maintenance issue.

If this is an issue I think the best workaround is probably to set the command for unity-system-compositor in lightdm.conf:

[SeatDefaults]
unity-system-compositor-command=/usr/sbin/unity-system-compositor.wrapper

And then strip out the --enable-hardware cursor in this wrapper script.

[1] https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/stable-phone-overlay