I have this same problem. Machine is an IBM T40, tried two separate mini-pci wifi cards (both atheros) one 802.11a/b and one a/g. Even when I get right next to the router, I get around 60 percent signal whereas another computer acorss the room gets 92 percent or higher.
Tried with 2 routers, WRT54G and a DI524 This is ubuntu edgy. I have tried turning off power management and so forth. For connecting I use networkmanager though iwconfig also seems to indicate very low signal. -- Atheros WLAN (MadWifi) poor signal strength https://launchpad.net/bugs/66481 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs