4gb pi4 AC (5GHz) wifi connection / stability issues

Hi all,

Finally got around to setting up my pi4 and am having some issues with using AC wifi. I can usually get it to connect but it eventually disconnects reporting “failed - input/output error”.
While it is connected it can’t handle and load without disconnecting into that error state.
When connected to N wifi (2.4GHz) from the same router it runs fine.

Can’t find a lot online, did find one report that a user has similar issues, replaced it and has been smooth sailing since.
Don’t want to jump to the conclusion that it’s hardware at fault though.

Anyone have similar issues or any thoughts?


Hi Meisner,

Thanks for your post, could you please include:

  • How it is being connected to the Pi 4 i.e. by PIXEL desktop or by SSH and editing the wpa_supplicant.conf file
  • The wpa_supplicant.conf file


For now it’s just a media player (waiting on some other stuff), it’s running libre elec so I just connected it directly using the interface. Just selecting the said and entering password.

I can set it up with something else if that will help with diagnosis?