Beaglebone UART1 u-boot output

serial-console.txt

U-Boot SPL 2011.09-00048-ga989bf1 (Aug 31 2012 - 09:16:57)
Texas Instruments Revision detection unimplemented
No daughter card present
OMAP SD/MMC: 0
reading u-boot.img
reading u-boot.img


U-Boot 2011.09-00048-ga989bf1 (Aug 31 2012 - 09:16:57)

I2C:   ready
DRAM:  256 MiB
WARNING: Caches not enabled
No daughter card present
NAND:  HW ECC Hamming Code selected
No NAND device found!!!
0 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - readenv() failed, using default environment

Net:   cpsw
Hit any key to stop autoboot:  0 
SD/MMC found on device 0
reading uEnv.txt

** Unable to read "uEnv.txt" from mmc 0:1 **
reading uImage

** Unable to read "uImage" from mmc 0:1 **
Booting from nand ...
HW ECC BCH8 Selected

no devices available
Wrong Image Format for bootm command
ERROR: can't get kernel image!
U-Boot# 

Hi There...

I got actually a similar trouble with my Beaglebone A6 trying to run Ubuntu build with the following link:
http://elinux.org/BeagleBoardUbuntu#Canonical.2FUbuntu_Images

Here ist the serial output of U-Boot:

U-Boot 2011.09-dirty (Feb 27 2012 - 10:01:37)

I2C: ready
DRAM: 256 MiB
No daughter card present
NAND: HW ECC Hamming Code selected
nand_get_flash_type: unknown NAND device: Manufacturer ID: 0x10, Chip ID: 0x10
No NAND device found!!!
0 MiB
MMC: OMAP SD/MMC: 0
*** Warning - readenv() failed, using default environment

Net: cpsw
Hit any key to stop autoboot: 0
SD/MMC found on device 0
reading uEnv.txt

906 bytes read
Loaded environment from uEnv.txt
Importing environment from mmc ...
reading uImage

** Unable to read "uImage" from mmc 0:1 **
reading uInitrd

** Unable to read "uInitrd" from mmc 0:1 **
Booting from mmc ...
Wrong Image Format for bootm command
ERROR: can't get kernel image!
Booting from nand ...

no devices available
Wrong Image Format for bootm command
ERROR: can't get kernel image!
U-Boot#
Could anyone give me an advice to solve this?

Best regard
Juergen