I recently started experiencing a situation where Airplay cannot find my device on my network, and it's unreachable using the web interface and by logging in using my Mac. I have to physically unplug the device and plug it back in again to get it to work.
I tried turning off power management of the wi-fi interface using:
ifconfig wlan0 power off
However, the Hifiberry still goes offline when I try again the next day.
Any ideas what's causing this and how to fix it?