I have a wifi card with support for 5Ghz. The card is the ASUS PCE AC56.

I have installed the drivers for my WiFi card from the "Additions drivers" tab in "Software & Updates", using the "Broadcom 802.11 Linux STA Wireless driver".

I have set my router to give different SSIDs to the networks on 2.4Ghz and 5Ghzs.

When I go to my Wifi Settings and I list the visible networks, only the one on 2.4Ghz appear, but not the one with 5Ghz.

What would I have to do, to be able to find the 5Ghz network?

  • :D I was going to answer the exact same as is already answered and you've already accepted that answer but forgot to award the bounty... ;-)
    – Fabby
    Dec 11, 2018 at 23:48
  • What do you mean? The bounty will be assigned to the accepted answer Dec 12, 2018 at 6:00
  • No, it won't: if you don't manually award it, only half gets automatically awarded...
    – Fabby
    Dec 12, 2018 at 18:32
  • 3
    Possible duplicate of Wireless lost ability to use 5GHz (PCE-AC68)
    – dessert
    Dec 12, 2018 at 22:33

1 Answer 1


Sounds the same as this problem: Wireless lost ability to use 5GHz (PCE-AC68)

The answer there says:

I had the same problem as you, and I just found the problem. The 5Ghz network was set to choose automatically the channel, one day it changed to a channel with an high number and my card wasn't able to find the network anymore.

So just check in your router if the network has an high number channel and change it back to a lower one (now I'm with channel 40 and it's working fine) and check if you can now find again the network.

I've also open a bug report in the bcmwl package page, if this is the problem click on the "This bug affect you" button in this page

I hope I have helped you.

  • Oh wow, that worked. I had never imagined that the channel would be a factor :-/ Dec 10, 2018 at 19:10
  • 1
    @EnriqueMorenoTent Yes it is a weird bug: bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1574196 Subscribe to the bug report to help get it fixed sooner. Dec 11, 2018 at 11:32
  • Thanks bunch! Changing the channel # fixed my problem. Seems the Asus PCIe AC51 (in my case) is an old card that probably doesn't detect the high channels.
    – Shailen
    Nov 27, 2022 at 14:02

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