Help!My Bluetooth can’t detect wireless keyborad of logi k580,how can i fix it?
i noticed that there were same problems before ,but i didn’t find the correct soluction. 
anyone can solve this! 
Welcome to the Manjaro forum @fromKansasCity
There’s no need to create a second heading in your post; it won’t serve to attract more help. But, these will:
- How to Request Support
- How to Find System Information
- How to Post Command Output and File Content as Preformatted Text
Cheers.
There are some suggested applications that may work with your device (I have not tried any of these), Logitech Unifying Receiver - ArchWiki, Solaar is available in the Manjaro repository and the others suggested are in AUR
Well,i downloaded the solaar before,but seems that i didn’t use it proprtly,after i plugin in the USB receiver and open the battery source ,it works. xD