Comment 21 for bug 1547302

I have tested the following files via grml iso boot:

1501444 kubuntu-16.04.1-desktop-amd64.iso
 719876 lubuntu-14.04.2-desktop-i386.iso
 860164 lubuntu-16.04-desktop-amd64.iso
1269220 ubuntu-gnome-16.04.1-desktop-amd64.iso
1624004 ubuntu-mate-16.04.1-desktop-amd64.iso
2722772 ubuntustudio-16.04.1-dvd-amd64.iso
1235460 xubuntu-16.04.1-desktop-amd64.iso

lubuntu-16.04-desktop-amd64.iso is the only file that exhibits this problem. All the rest work as expected. I have no further details.