Comment 0 for bug 855921

if you pxeboot an image and hand it a preseed file, and in that preseed file you have netcfg/choose_interface=eth0, it doesn't work and it pops up a menu and asks you what interface you want as your default interface.

If, however, you pass netcfg/choose_interface=eth0 to the kernel as a boot option - it works as expected and does not display a menu option for this value.

In a room full of headless machines being booted by cobbler, displaying menus is bad, as is not having those machines be able to find dhcp.