July 10th, 2015

Front USB connectors are evil

NFSroot over USB on n900 was only giving me 300KiB/sec... and I thought that was normal. Now I plugged the cable to back USB port (not front one) and... speed went from 300KiB/sec to 2.5MiB/sec. Not bad for old cellphone.

Someone must be joking?
root@n900:/sys/devices/platform/68000000.ocp/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.