Hi,
I have recently purchased a Flint 3 router. I have been waiting for it to be released for a while, and I really love it and its capabilities.
Unfortunately, I have been experiencing certain issues with 6GHz connectivity. I use Ubuntu 25.04 on my laptop, Kernel 6.14 in combination with Intel Killer BE1750 Wi-Fi card. I have tried almost every solution that I could find online, except for downgrading the kernel.
I just can not connect to 6Ghz.
When I check with "nmcli" the 6Ghz bands are visible but bandwidth shows as 0. In the beginning I thought it could be a regulatory issue (I am from NL), but it’s allowed, so I doubled checked the region set on my laptop and router and made sure it’s NL (with iw command). For additional troubleshooting, I reinstalled the linux-firmware package, NetworkManager, and a couple of other components.
So my question is has anyone else experienced such issues and if you maybe know how to work around it, preferably not the kernel downgrade solution (I found some post on AskUbuntu that says that Kernel 5.15 works, so essentially rollback to Ubuntu 22)?
I forgot to add that for 6GHz, I tried to set bandwidth all the way down to 40 MHz. I also double-checked that my wpa_supplicant version (2.10) supports WPA3-SEA. I am kinda lost at this point whether this is a problem with my setup or with the router.
That's unfortunate. I'm out of ideas if there's no 'known good' hardware to compare against to try to get some variables out of the way.
It may not be what you want to hear but 'lay flat' Cat. 6a cable is pretty cheap, with a max. distance of 100 m/328 ft @ 10 Gbps. Cat 6's max. is 55 m/164 ft/10 Gbps. You'll never have to worry about battling crowded Wi-Fi airspace again.
If @packetmonkey is around I'd hope he'll correct me.
I am not going to lie, it crossed my mind, but I was really hoping for a slightly less wired life with Wi-Fi 7. If somehow I can get it to work, I will post an update. I might ask my neighbours for a little bit of help if they have any 6Ghz capable devices.
Before, I focused purely on the fault being in the linux firmware package or the NetworkManager I tried all possible things that I could find online in hope it could help. Just now I tried the simplest test possible, a.k.a. live boot from a USB, I don't know why I didn't think of this before. I tested Fedora 42 and Linux Mint 22.1.
With some confidence, I can say that I believe that the Linux kernels above 6.8.0-51 have issues with MLO and 6Ghz bands. Fedora 42 with the kernel 6.14 could not connect to a 6Ghz band and properly utilise MLO same as Ubuntu 25.04, but Mint 22.1 with kernel 6.8.0-51 could.
Below I attached some screenshots from Mint, not from Fedora, since I did not think of it until testing on Mint . Funny thing is, bandwidth still appears as 0.
I want to mention though that I am unsure whether this is a direct fault of the new kernel or is it Canonical doing something funky with Ubuntu. But taking into consideration that Fedora 42 with the exact same kernel also does not work, I would hazard a guess that it's a fault of the new kernel.
on xubuntu 24.04.2 LTS with a Intel Corporation Wi-Fi 6E(802.11ax) AX210/AX1675* 2x2 [Typhoon Peak] (rev 1a). works well. Its a 25$ ish card on amazon. would go BE200 but support is flaky driver wise at the moment.
I've found it best to put some weight on them to first gently stretch out them &/or use tape at key intervals while they 'uncoil' themselves via gravity. It's more bothersome compared to Wi-Fi, sure, but it works for long term placement... & reliability.
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. Funny thing is, bandwidth still appears as 0.
