Comment 14 for bug 1291359

I've fixed this bug in the attached patches. The first solves the problem with minimal changes, but is inefficient as it computes the entire (multi-monitor) wallpaper once per monitor rather than computing it just once, resulting in an added delay of a second or two with a large multimonitor setup. The second patch fixes that inefficiency, but touches a lot more of the code.

To apply this patch to your 16.04 system:

    mkdir work && cd work
    # get second.diff and put it here
    sudo apt build-dep unity
    apt source unity
    cd unity-7.4.0+16.04.20160906/
    patch -i ../second.diff -p1
    DEB_BUILD_OPTIONS="nocheck" dpkg-buildpackage -us -uc -nc -j10
    sudo dpkg -i ../*.deb

Henry/others: If you're feeling like a retroactive bounty, my Bitcoin address is on http://forre.st/