Re: [PATCH] Scan other networks first to unlock 5GHz bands on Intel cards

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Hi,

On 8/10/24 2:50 AM, Taavi Eomäe wrote:
Hi,

Not the submitter of the patch, but I think this is needed because of Intel's Location Aware Regulatory (LAR). If a scan is not done beforehand, all 5GHz channels are marked as NO-IR.

This is incredibly inconvenient, but indeed a quirk with Intel cards. There's also an open Bugzilla ticket about it: https://bugzilla.kernel.org/show_bug.cgi?id=206469

It also has the nasty side-effect of making 6GHz APs practically impossible to start.
My 2 cents: this is actually a common "feature" of many self-managed wifi cards. Until the regulatory domain is established frequencies are either disabled/NO-IR due to legal requirements. From the station side of things you already are scanning on startup, so things just work. Not sure how APs are supposed to deal with this, maybe "real" AP vendors use custom firmware that allows you to set the country explicitly?

On 03/08/2024 11:55, Jouni Malinen wrote:
On Wed, Jul 17, 2024 at 07:56:04PM +0000, Pedro Goncalves (developer account) wrote:
Subject: [PATCH] For intel Wi-Fi cards, force to scan other wireless networks so the drive is able to set the correct region - master

Signed-off-by: Pedro Goncalves <pgoncalves-developer@xxxxxxxxxxxxxx>
This would need much more detailed commit message to justify why this is
needed and why this is appropriate behavior. How is this specific to
Intel cards? Why would an AP be allowed to operate on the 5 GHz band
based on just a single scan if it was not allowed to do so without that
scan?

Index: src/ap/hostapd.h
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/src/ap/hostapd.h b/src/ap/hostapd.h
And this format is pretty strange and requires manual operations to
apply with 'git am'.


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