I added the modprobe ledtrig-heartbeat to /etc/rc.local for now,
although I'm sure there's a better place.

I cycled the power 10 times.  9 times it was normal, but one time there
was a 30s delay before boot completed.  If it delayed 30s with LEDs off,
many people will think the board is OFF.


Normal -->

[    2.144744] udev[65]: starting version 165
Begin: Loading e[    2.153198] usb 1-1: new high speed USB device using 
ehci-omap and address 2
ssential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
[    2.357147] hub 1-1:1.0: USB hub found
[    2.361633] hub 1-1:1.0: 5 ports detected
Begin: Running /scripts/local-premount ... done.
[    2.412078] EXT3-fs: barriers not enabled
[    2.419006] kjournald starting.  Commit interval 5 seconds
[    2.425384] EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode
Begin: Running /scripts/local-bottom ... done.
done.
Begin: Running /scripts/init-bottom ... done.
[    2.668670] usb 1-1.1: new high speed USB device using ehci-omap and address 
3


Slow -->

Begin: Loading e[    2.145019] usb 1-1: new high speed USB device using 
ehci-omap and address 2
ssential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
[    2.341339] hub 1-1:1.0: USB hub found
[    2.346069] hub 1-1:1.0: 5 ports detected
[    2.824768] usb 1-1.1: new high speed USB device using ehci-omap and address 
3

Begin: Running /scripts/local-premount ... done.
[   32.391906] EXT3-fs: barriers not enabled

You can notice that the difference is usb node 1-1.1 enumeration
happening before local-premount or not (before local-premount makes the
delay).

usb node 1-1.1 is the SMSC USB Ethernet PHY.

Is there a race between the USB Ethernet PHY enumeration and the rootfs
being ready to use network layer?  Eg, no /sys mounted at that time in
the bad case or somesuch?

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https://bugs.launchpad.net/bugs/708883

Title:
  Panda board shuts down during boot

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