WiFi card (WCN785x) not working

wifi not working in Ubuntu Studio but works in Windows.
I want to get it working in Ubuntu Studio.

Ubuntu Version:

Version Ubuntu Studio 24.04

Desktop Environment (if applicable):

KDE Plasma Version 5.27.11

Problem Description:

Want to use wifi but no wifi appears in Ubuntu (works in Windows).

Relevant System Information:

Screenshots or Error Messages:

What I’ve Tried:

have run recommended script and result is at https://termbin.com/lbp4


Previously someone had the same issue (title of post to ask ubuntu; Issue with Wireless Network Connection on Ubuntu 24.04 LTS) 9 months ago and it was resolved by loading latest Kernal. My Ubuntu Studio was just installed last week and so should be newer.

I’m guessing this is your problem:

[    2.323004] ath12k_pci 0000:04:00.0: qmi failed to load regdb bin:
[    2.323005] ath12k_pci 0000:04:00.0: qmi failed to load regdb file:-2

Looking here:

https://askubuntu.com/questions/1534383/driver-for-wcn785x-wi-fi-7802-11be-320mhz-2x2-qualcomm-technologies-not-work

it seems the issue is related to the kernel. To solve it, you’ll want at least 6.11.0-12 (you’re on 6.8.0-52). There’s a higher version in the updates and security pocket for 24.04, so if you upgrade your packages, you should get the fix. You’ll want to reboot for that change to take effect.

Well, that should be the case. I know Studio uses the low latency kernel. I would expect it to track similarly, but I could be wrong. I haven’t bothered with the low latency version in a while, so I’m not sure. @eeickmeyer can you chime in on that?

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Low Latency and Generic kernels are patched in tandem.

Also, for future reference, there’s hardly any difference between the Low Latency and Gerneric kernels. The config is a small delta.

As of 24.10, Ubuntu Studio no longer uses the Low Latency kernel.

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There you go. @rosshhill get your kernel upgraded and you should be good.

Updated to Ubuntu Studio 24.10 (couldn’t find how to just update kernel) and the problem is solved.
Thanks for the help is is much appreciated.

Happy to help! Feel free to mark a solution and close this thread! I’m going to go ahead and close this for you.