Originally Posted by rambo

I had a problem with normal wlan connections after setting the wlan0 interface to ad-hoc mode for the MobileHotspot project. Solved it by explicitly setting the wlan0 interface to managed mode on connection teardown.

Try installing wireless-tools and then running following commands as root:

Code:

ifconfig wlan0 down
iwconfig wlan0 mode managed
iwconfig wlan0 key open

As for reboots esp. with macs they may be related to a bug in the wifi driver in kernel, both the kernel-maemo and hotspot-kernel have patches to fix that bug.