[fedora-arm] Possible Hangups on Raspberry Pi with FC25 Server

Hello, I recently bought a Raspberry Pi and I want to use it as a small server. I installed FC25 on it. The only additional piece of hardware is a bluetooth keyboard/mouse device, which is connected via usb dongle. On the software side I only installed a samba server and opened the related ports with a firewall command. This installation is working and I can access the shared folder. However after a while - it differs - the server isn't available anymore. No ping is possible, also there is no HDMI signal anymore - the only thing I can do is restart it. I'm keeping the software up to date, but that doesn't solve the problem. So what I would like to ask is, if there are known stability issues? Or is there something I can check and maybe fix? Maybe I could provide some details (not sure what - log doesn't tell anything usefull) to track down any issue. Best Regards Alex