5G Wi-Fi doesn't working in snapshot of Lenovo Y1

I meet a problem when I flashing the snapshot to my Lenovo Y1, I can't find the 5G radio in wireless settings. How do I find the problem is?

I had this problem too. ( I think it's a bug? Other router... )

You could flash a stable version and then copy


Otherwise you could try to add it manually

config wifi-device 'radio1'
  option type 'mac80211'
  option channel '36'
  option hwmode '11a' # or '11n'...

I have try this configuration according update without wipe configuration. Doesn't work else.

Here's my friend Joshua Holborn say:

[    0.409496] mt7620-pci 10140000.pcie: MT7620 PPLL unlock
[    0.414640] mt7620-pci: probe of 10140000.pcie failed with error -1

Can't find the 5G chimps on PCI-e, may not about the mt76 problem.

About this problem, k900 have send a pull request: ramips: fix PCI init on MT7620 with Linux 4.9+

Problem resolved.