Unable to connect to wifi after update from 153 to 159

I install IPFire 153 (because I have it downloaded and verified and copied to a USB stick) and then have a wifi card and connection on the red zone.
I can get this working - IPFire connects to the wifi router.
However, when I then update IPFire to 159, IPFire will no longer connect to wifi in the red zone.
I have deleted and re-added a network under System > Wireless client and this does not help.
I have twice installed 153, got wifi working on red zone, and then updated to 159 and lost the connection.
I am not sure what else to do.
Any help would be much appreciated. Thanks ahead of time.


are there any log messages in /var/log/messages or output of lspci? These would help us a lot to tell what the problem is exactly.

Also, Core Update 159 is outdated. Please always try to reproduce the issue with the latest Core Upgrade - swiftly installing upgrades is strongly recommended due to security reasons anyway.

Thanks, and best regards,
Peter Müller