uboot hangs?

[Nick Guenther]

When I first got my neo it booted fine (well, besides lacking a
rootfs). Now, however, if I just turn it on (holding just [POWER]) it
hangs immediately at the first splash screen (before loading the
kernel). The strange thing, though, is that if I hold [AUX]+[POWER]
and then select "Boot" at the uboot menu it boots fine, and also if it
happens to be plugged in via USB at the time it boots fine.

The software on the device right now is:
u-boot-gta01bv4-1.2.0+git20070917+svnr2943-r0.bin
uImage-fic-gta01-latest.bin as of 2007-10-11
OpenMoko-openmoko-devel-image-glibc-ipk-P1-Snapshot-20071019-fic-gta01.rootfs.jffs2

I don't think the problem is with the rootfs, because I changed that
and still have the same problem (and anyway it's not touching the
rootfs until it loads the kernel).

I don't know if it's the reflashing that did it, or if I set some
setting somewhere (I guess in the NVRAM?) that's confusing it.

Has anyone else experienced this? Tips on where to look?

-Nick