Someone must be joking?
cp/480ab000.usb_otg_hs/musb-hdrc.0.auto# cat vbus
Vbus off, timeout 1100 msec
It looks like my n900 was bitten by famous "all calls disabled" problem. ( example solution ). Prague Brmlab helped a lot, and baking n900 for 15minutes at 250C seems to have fixed the problem... for a week. Now it looks like it slowly creeps back.