Hi Thorsten, >> The other possibility is that this is actually a bios bug, as the DSM >> is being read out of ACPI. In which case that would be Dell's fault. > > Yes and no, but no: > > A kernel change exposed this problem, hence it doesn't matter if the > BIOS is faulty: it's makes it a kernel regression and those are not > allowed. For more on this see > https://docs.kernel.org/admin-guide/reporting-issues.html > > That at least would be the normal approach. But the thing is: the legal > implications when it comes to things like wifi make this somewhat > trickier. :-/ so you need to set your country code first before any of the regulatory enabled channels on 6Ghz get used. Otherwise you are stuck in the world domain that doesn’t allow 6Ghz at all. Two choices, either you run iwd and just set Country=DE where this than would be persistent; see iwd.config(5). Or you do this via iw reg set DE manually. wpa_supplicant has a set_country wrapper, but I don’t see it being used anywhere, so I assume you have to do this manually when using wpa_supplicant. And of course tools like crda etc. need to be fully functional to load the appropriate regulatory information. Since any 6Ghz operation is blocked by default. Regards Marcel