Booting Fedora 20 TC4 on Wandboard Quad

by mrunge
in Fedora

Lately, I got a shiny new Wandboard Quad into my fingers, and it's "enabled hardware" on Fedora 20. I took a TC4 test build from http://koji.fedoraproject.org/koji/taskinfo?taskID=5896895:

wget http://kojipkgs.fedoraproject.org//work/tasks/6895/5896895/Fedora-Minimal-armhfp-20-Alpha-TC4-sda.raw.xz
xzcat Fedora-Minimal-armhfp-20-Alpha-TC4-sda.raw.xz | sudo dd of=/dev/mmcblk0 bs=4M
sudo sync

Sadly, it's not bootable by default, we need to write a bootblock. From the package uboot-wandboard_quad, wel'l take the file

/usr/share/uboot-imx6quad/u-boot.imx

and dd it to the sdcard:

sudo dd if=u-boot.imx of=/dev/mmcblk0 bs=1k seek=1
sudo sync

Currently, the image creation has a known bug: extlinux.conf is missing, though we create one by hand and write it to /boot/extlinux/extlinux.conf on the sdcard:

# extlinux.conf generated by anaconda

ui menu.c32

menu autoboot Welcome to Fedora. Automatic boot in # second{,s}. Press a key for options.
menu title Fedora Boot Options.
menu hidden

timeout 60
#totaltimeout 9000

label Fedora (3.11.0-3.fc20.armv7hl) 20 (Rawhide)
   kernel /vmlinuz-3.11.0-3.fc20.armv7hl
   fdt /dtb-3.11.0-3.fc20.armv7hl/imx6q-wandboard.dtb
   append console=ttymxc0,115200 root=UUID=bb2f901b-dfe1-4344-81bf-ae7fb675cead ro rhgb quiet LANG=en_US.UTF-8
   initrd /initramfs-3.11.0-3.fc20.armv7hl.img

Finally, we'd need to update the UUID of the root partition:<

sudo blkid -oexport -sUUID /dev/mmcblk0p3

will report the name of the partition and the UUID, which we'd need to insert to the kernel append line in extlinux.conf

Insert the SDCard to the card reader directly below the heat sink, connect your serial console, and wait. Probably, you'd need to type boot, when you're dropped to the uboot prompt.