fixed value for 'quality' (iwlist scan)

I own an 'Toshiba Tecra S1'. Wlan is working, the driver ipw2100 has 
been auto-detected.

The problem is that 'signal strength' is not constantly reported. It is 
a constant value. nm-applet is affected, and 'iwlist scan', too. 
Example:

$ iwlist scan | grep Quality
                    Quality:86  Signal level:0  Noise level:0
                            ^^

^^ => This is the value that stays constant, even if the distance 
between notebook and AP increases.

I noticed, that this value is only 'refreshed' if i do a

$ modprobe -r ipw2100
$ modprobe ipw2100

After every single reload of the driver, the value stays again constant. 
Well, not a perfect solution ;-)
I also noticed, that kismet is able to provide and update the signal 
strenght.

Can this be fixed in ipw2100?
If you need more info, don't hesitate to aks. I am subscribed to the 
list for the next few weeks.

Kind regards
Henning

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