I am running GNOME Shell and I have installed network-manager-connectivity-debian. When I first connect to a WiFi hotspot a "Network Login" window opens (a chromeless browser), and I can enter my credentials to get internet access.
(This applies to hotspots at multiple locations and serviced by different ISPs. Some are paid, some are free-for-30-minutes. I don't know which ones do or don't use WISPr.)
However, sometimes the "Network Login" window disappears suddenly, so I can't interact with the captive portal. (For example, to see how much credit I have left and/or top up my credit.) And sometimes I close it accidently :P
How can I force the "Network Login" window to reappear? (whether or not I still have internet access)
I already have a handful of numerous workarounds for these situations. I specifically want to know how to get the "Network Login" window back.