I have asked a similar question on the Ubuntu pages but this is likely a generic Linux issue: what variety of wireless cards/drivers will support being placed in a bridged connection? I have been using very old Prism II hardware as it worked while I believe more recent cards did not, but the old hardware died, killing the bridge.
According with the hostapd guys, wireless cards that fits better as a AP or even a WDS(that obviously, requires a bridge interface) are:
There is no list, but generally, prism drivers and mac80211 ones that uses SoftMAC(more control over the configurations through software) will work just fine.
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