Thanks for the info.

Using the DSL-LiveCD I was able to use the flasher in an easy way (Thanks to quingu).
Now dmesg tells me a host is there, and also if a USB cable is connected.
But now there is no USB notification in the status area of the desktop anymore.
Regardless if I plug or unplug the USB cable, no USB symbol...

Also, the keyboard doesn't work yet using the hub.

Theoretically it should, since all the +5V lines inside the hub
are straight connected on the pcb, as is with the GND lines.
So if I plug in the mains adapter, the +5V lines of every port
has +5 Volts, actually +5.09 volts, with Nokia 770 connected.
And the manual of the hub says it delivers up to 500mA to the ports,
as long as the mains adapter is connected.

At least from this point there should be no need for another power injector,
or am I wrong here?

Or is there another software or configuration thing I missed?

I additionally tried the echo host... cmd as root, but no difference so far.

Thanks for your help.

Ray