I have just installed my new PCI wifi network card from TP-LINK (TL-WN751ND). And it seems everting is loaded correctly. I can see the card when I ls pci:
04:05.0 Network controller: Qualcomm Atheros AR9227 Wireless Network Adapter (rev 01)
Gnome network manager see the card and even display some networks visible. The problem is that there is no network I'm intrested in. I have USB wireless card (TP-Link WN321G) which work without problems (connected to the same PC detect the network properly). Networks visible on PCI card overlap partialy with those visible on USB card. The Acces point is in the same room.
Do you have any idea what can be wrong?
Thank you in advance
Maybe the Access Point is broadcasting on a channel that can not be reached by your TL-WN751ND due to country/hardware restrictions.
Try to set a low, fixed channel on your Access Point, like 1 or 7.
It did help. At one specific chanel i could see the network but the remaining cards (my laptop, ipod etc.) lost signal totally or its quality decreased significantly. Is this configurable somehow? By drivers for example?