Hey Peter, hope this is a bit more helpful:

U-Boot 2013.10-rc3 (Jan 20 2014 - 13:33:34)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
Reset cause: POR
Board: UDOO
DRAM:  1 GiB
MMC:   FSL_SDHC: 0
*** Warning - bad CRC, using default environment

auto-detected panel HDMI
Display: HDMI (1024x768)
In:    serial
Out:   serial
Err:   serial
Net:   using phy at 6
FEC [PRIME]
Hit any key to stop autoboot:  0 
UDOO board => help
?       - alias for 'help'
base    - print or set address offset
bdinfo  - print Board Info structure
boot    - boot default, i.e., run 'bootcmd'
bootd   - boot default, i.e., run 'bootcmd'
bootm   - boot application image from memory
bootp   - boot image via network using BOOTP/TFTP protocol
bootz   - boot Linux zImage image from memory
clocks  - display clocks
clrlogo - fill the boot logo area with black
cmp     - memory compare
coninfo - print console devices and information
cp      - memory copy
crc32   - checksum calculation
dcache  - enable or disable data cache
dhcp    - boot image via network using DHCP/TFTP protocol
echo    - echo args to console
editenv - edit environment variable
env     - environment handling commands
erase   - erase FLASH memory
exit    - exit script
ext2load- load binary file from a Ext2 filesystem
ext2ls  - list files in a directory (default /)
false   - do nothing, unsuccessfully
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls   - list files in a directory (default /)
fdt     - flattened device tree utility commands
flinfo  - print FLASH memory information
go      - start application at address 'addr'
hdmidet - detect HDMI monitor
help    - print command description/usage
icache  - enable or disable instruction cache
iminfo  - print header information for application image
imxtract- extract a part of a multi-image
itest   - return true/false on integer compare
loadb   - load binary file over serial line (kermit mode)
loads   - load S-Record file over serial line
loadx   - load binary file over serial line (xmodem mode)
loady   - load binary file over serial line (ymodem mode)
loop    - infinite loop on address range
md      - memory display
mdio    - MDIO utility commands
mii     - MII utility commands
mm      - memory modify (auto-incrementing address)
mmc     - MMC sub system
mmcinfo - display MMC info
multiboot- manage a multiboot startup
mw      - memory write (fill)
nfs     - boot image via network using NFS protocol
nm      - memory modify (constant address)
ping    - send ICMP ECHO_REQUEST to network host
plotmsg - Plot text message on current display (HDMI or LVDS).
         -r Overwrite last message.
         -u Start writing just under Logo.
printenv- print environment variables
protect - enable or disable FLASH write protection
reset   - Perform RESET of the CPU
run     - run commands in an environment variable
sata    - SATA sub system
saveenv - save environment variables to persistent storage
setenv  - set environment variables
setexpr - set environment variable as the result of eval expression
showvar - print local hushshell variables
sleep   - delay execution for some time
source  - run script from memory
test    - minimal test like /bin/sh
tftpboot- boot image via network using TFTP protocol
true    - do nothing, successfully
version - print monitor, compiler and linker version
UDOO board => printenv
baudrate=115200
boot_fdt=try
bootcmd=mmc dev ${mmcdev}; if mmc rescan; then if run loadbootscript; then run bootscript; else if run loaduimage; then run mmcbooi
bootdelay=5
bootscript=echo Running bootscript from mmc ...; source
console=ttymxc1
ethact=FEC
ethaddr=00:c0:08:88:a2:a2
ethprime=FEC
fdt_addr=0x11000000
fdt_file=imx6q-udoo.dtb
fdt_high=0xffffffff
initrd_high=0xffffffff
ip_dyn=yes
loadaddr=0x12000000
loadbootscript=ext2load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};
loadfdt=ext2load mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}
loaduimage=ext2load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${uimage}
mmcargs=setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} fbmem=24M video=mxcfb0:dev=hdmi,1920x1080M@602
mmcboot=echo Booting from mmc ...; run mmcargs; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then boo;
mmcdev=0
mmcpart=1
mmcroot=/dev/mmcblk0p1 rootwait rw
netargs=setenv bootargs console=${console},${baudrate} root=/dev/nfs ${hdmi_patch} ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp
netboot=echo Booting from net ...; run netargs; if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; $;
script=boot.scr
splashpos=m,m
uimage=/boot/uImage
update_sd_firmware=if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; if mmc dev ${mmcdev}; then if i
update_sd_firmware_filename=u-boot.imx

Environment size: 2075/8188 bytes
UDOO board => iminfo

## Checking Image at 12000000 ...
Unknown image format!
UDOO board => md
md - memory display

Usage:
md [.b, .w, .l] address [# of objects]
UDOO board => mmcinfo
Device: FSL_SDHC
Manufacturer ID: 3
OEM: 5344
Name: SU16G 
Tran Speed: 50000000
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.8 GiB
Bus Width: 4-bit
UDOO board => showvar 
HUSH_VERSION=0.01
UDOO board => 



On Sun, Mar 23, 2014 at 7:41 AM, Peter Robinson <pbrobinson@gmail.com> wrote:
On Sat, Mar 22, 2014 at 2:25 AM, Jason Porter <lightguard.jp@gmail.com> wrote:
> Trying to boot the Fedora-Minimal-armhfp-rawhide-20140320-sda image I
> downloaded from koji today, looked like the 20140321 builds failed just
> gives me a blank screen. Here's the console output from booting their Ubuntu
> image:

Not much help. Can you interrupt the boot during the uboot phase (ie
before it says "Booting kernel from Legacy Image") and then at the
uboot prompt type:
help <press enter>
printenv <press enter>

And the take a copy of all the output for us. The above is using an
ancient kernel without DT support and is ancient history ;-)

Peter



--
Jason Porter
http://en.gravatar.com/lightguardjp