Currently having trouble with the wlan on my N900 at the moment.
It has happened occasionally before but not for a good while.
Normally a reboot fixes, I assume it will this time; but wondering if anybody know why and if it's happened before?

The wlan is set to autoconnect. I locked and secured the N900 before entering a building with an AP I already setup.
Came back to it 2 hours later unlocked a there was a banner "Failed to connect, retry?"
From this point on it will not connect to any wlan connection, although 2G/3G is fine.

sudo ifconfig is missing wlan0 and wmaster.

Doing wlan0 up and wmaster0 up makes them appear in ifconfig again.
Although trying to connect to an AP makes wlan0 and wmaster0 disappear again.

It's not easy to get the full output of ifconfig pasted up here but if it's necessary I can do that.

lo and phonet0 output seems normal.

Thanks for any help in advance.