boot from ext4 partition I used the following item file: Code: ITEM_NAME="Ubuntu 12.04" ITEM_KERNEL="uImage" ITEM_DEVICE="${EXT_CARD}p3" ITEM_FSTYPE="ext4" ITEM_CMDLINE="root=/dev/mmcblk0p3 rootwait console=tty0 omapfb.vram=0:2M,1:2M,2:2M mtdoops.mtddev=2 nosplash elevator=noop panic=20" ITEM_REUSEATAGS="1"
ITEM_NAME="Ubuntu 12.04" ITEM_KERNEL="uImage" ITEM_DEVICE="${EXT_CARD}p3" ITEM_FSTYPE="ext4" ITEM_CMDLINE="root=/dev/mmcblk0p3 rootwait console=tty0 omapfb.vram=0:2M,1:2M,2:2M mtdoops.mtddev=2 nosplash elevator=noop panic=20" ITEM_REUSEATAGS="1"
I had to make a small manual adjustment in the uSD after the install.sh script completed. My first partition was of type 83 instead of 0C, although it did contain a vfat filesystem, so I had to fix it by hand.