XO-4 B1 fails to boot

[wad]

When an XO-4 B1 has been sitting unpowered for a long period of time, it sometimes doesn't boot. The visible symptom is that the screen powers on, but there is no boot chime and there is no XO icon drawn on the screen.

This is difficult to reproduce, as it always seems to boot fine the second time. I mainly discovered this when booting laptops from the factory for the first time.

The message printed on the serial port is the CForth banner through "releasing", then "Unimplemented package interface procedure". CForth eventually decides that OFW didn't start up and prints a 52 ("OFW seems not to have booted all the way").

[wmb@…]

I saw it too on my B1, this morning.

[wad]

Seen on both SKU292 and SKU294 laptops. Mitch's is either a SKU291/SKU293, so this appears on all hardware versions.

[martin.langhoff]

Just seen it on SKU 292 SHC2380002A.

[wmb@…]

Fixed, I think, by svn 3353

[wad]

Fix verified.

The problem was that the efface-md function was being called on first boot out of the factory, and it was trying to power-cycle the DCON before the DCON device was instantiated, hence the "Unimplemented package interface method" which was really a call to dcon-off.