I'm having problems both with bluetooth and wifi, my pc is a Lenovo B5400. The BT can do a scan, but it isn't able to find any devices; I don't see any wifi network (but I have a working Ethernet connection). I read many topics on the internet but before trying different solutions and make some changes (I just installed Ubuntu 14.04) I would firstly try to understand what could the problem depend on. What are the commands I can use to see what's going on? Thank you in advance