This thread appears to be the same problem with no replies:
Every time I try to connect wirelessly to my Netgear WPN824v2 router with my new Ubuntu install, the router immediately drops all connections. It works fine with a Windows 7 install and the same wireless card, so I'm suspecting the problem is with the router itself. I've been able to connect once or twice, but I can't reproduce connecting reliably, and both times the connection dropped within a minute and the router plotzed and dropped everything.
My wireless card is a Realtek RTL8188CE 802.11b/g/n adapter. Strangely, it seems to be running on a rtl8192ce driver. I can connect via ethernet just fine. There are no firmware updates available for the router and dd-wrt doesn't support this model.
Things I've tried:
iwconfig wlan0 rate 2M auto
Tried installing rtl8188ce driver from Realtek's website -- no help. Made sure build-essential and the appropriate kernel headers were installed, no help.
It's been a week and my frustration is palpable. Any advice would be a huge help.