Comment 1 for bug 820116

with this uEnv.txt:
autoload=no
uenvcmd=usb start; bootp; pxe get; pxe boot

I get this:
Texas Instruments X-Loader 1.5.1 (Jul 26 2011 - 00:40:14)
Reading boot sector
Loading u-boot.bin from mmc

U-Boot 2011.06 (Jul 27 2011 - 00:58:33)

CPU : OMAP4430
Board: OMAP4 Panda
I2C: ready
DRAM: 1 GiB
MMC: OMAP SD/MMC: 0
Using default environment

In: serial
Out: serial
Err: serial
Net: No ethernet found.
Hit any key to stop autoboot: 0
reading boot.scr

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

78 bytes read
Importing environment from mmc ...
Running uenvcmd ...
(Re)start USB...
USB: Register 1313 NbrPorts 3
USB EHCI 1.00
scanning bus for devices... The request port(2) is not configured
The request port(2) is not configured
3 USB Device(s) found
       scanning bus for storage devices... 0 Storage Device(s) found
       scanning bus for ethernet devices... 1 Ethernet Device(s) found
Waiting for Ethernet connection... done.
BOOTP broadcast 1
EHCI timed out on TD - token=0x8008d80
BOOTP broadcast 2
*** Unhandled DHCP Option in OFFER/ACK: 28
*** Unhandled DHCP Option in OFFER/ACK: 28
DHCP client bound to address 10.42.43.50
missing environment variable: pxeuuid
missing environment variable: ethaddr
Retreiving file: pxelinux.cfg/2E-40-4F-F6-6C-0A
Waiting for Ethernet connection... done.
Using sms0 device
TFTP from server 10.42.43.1; our IP address is 10.42.43.50
Filename 'pxelinux.cfg/2E-40-4F-F6-6C-0A'.
Load address: 0x88000000
Loading: #
done
Bytes transferred = 508 (1fc hex)
Config file found
Ignoring malformed menu command: label
Ignoring malformed menu command: label
Hit any key to stop autoboot: 0
Label: linux-2.6.38
        kernel: kernels/linux-2.6.38.bin
        append: root=/dev/sdb1
Retreiving file: kernels/linux-2.6.38.bin
Waiting for Ethernet connection... done.
Using sms0 device
TFTP from server 10.42.43.1; our IP address is 10.42.43.50
Filename 'kernels/linux-2.6.38.bin'.
Load address: 0x80200000
Loading: *
TFTP error: 'File not found' (1)
Not retrying...
File not found
Skipping label
Label: install
        kernel: kernels/install.bin
        append: console=ttyAMA0,38400 debug earlyprintk
        initrd: initrds/uzInitrdDebInstall
Retreiving file: initrds/uzInitrdDebInstall
Waiting for Ethernet connection... done.
Using sms0 device
TFTP from server 10.42.43.1; our IP address is 10.42.43.50
Filename 'initrds/uzInitrdDebInstall'.
Load address: 0x81600000
Loading: *
TFTP error: 'File not found' (1)
Not retrying...
File not found
Skipping label
Label: local
        append: root=/dev/sdb1
missing environment variable: localcmd
reading uImage

3610768 bytes read
Booting from mmc0 ...
## Booting kernel from Legacy Image at 82000000 ...
   Image Name: Ubuntu Kernel
   Image Type: ARM Linux Kernel Image (uncompressed)
   Data Size: 3610704 Bytes = 3.4 MiB
   Load Address: 80008000
   Entry Point: 80008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.