[DragonFlyBSD - Bug #3366] ifconfig wlan0 scan - S:N is 0 with iwm0

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #3366 has been updated by arcade at b1t.name.


I know (have) this one, replaced AC6 Realtek with this one in my laptop as Realtek was totally unsupported:

Apr  1 10:52:49 slipper kernel: iwm0: <Intel(R) Dual Band Wireless AC 8265> mem 0xd0500000-0xd0501fff at device 0.0 on pci3
Apr  1 10:52:49 slipper kernel: iwm0: hw rev 0x230, fw ver 22.361476.0, address 04:cf:4b:6c:f5:61

Apr  1 10:52:50 slipper kernel: iwm0: need promiscuous mode update callback

Same problem here, I can't see s/n ratio for any station, though it connects fine. Mostly fine. Sometimes it just fails to connect to any station and can sit there for dozen minutes. `ifconfig wlan0 down; sleep 1; ifconfig wlan0 up` fixes the issue. Waiting 1 second before bringing interface up during boot has no effect.

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Bug #3366: ifconfig wlan0 scan - S:N is 0 with iwm0
http://bugs.dragonflybsd.org/issues/3366#change-14537

* Author: mneumann
* Status: New
* Priority: Normal
* Target version: 6.6
* Start date: 2024-04-01
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When I scan for all access points, all their S:N (Signal to Noise Ratio) is reported as zero!

# /etc/rc.conf
wlans_iwm0="wlan0"
ifconfig_wlan0="DHCP WPA"

Doing a `ifconfig wlan0 scan` reports for example:

SSID/MESH ID    BSSID              CHAN RATE   S:N     INT CAPS
Bon House       7c:a1:07:12:86:c8    1   54M   0:0    200 EP   HTCAP WPA RSN WME
Thang Long ...  6c:5a:b0:35:42:f9    1   54M   0:0    100 EPS  RSN HTCAP WME ATH WPS
Quy's home      c8:bf:4c:19:48:99    1   54M   0:0    100 EP   WPA RSN WPS HTCAP WME
Long2003        a8:25:eb:20:c0:89    1   54M   0:0    100 EPS  HTCAP WME ATH RSN WPA WPS
Redmi_Quyda...  88:c3:97:3a:f3:fa    1   54M   0:0    100 EP   WPA RSN WPS HTCAP WME
DIRECT-6B-H...  f6:39:09:5a:e4:6b    6   54M   0:0    100 EP   RSN HTCAP WME WPS
DrayTek         16:49:bc:46:9c:84    6   54M   0:0    100 EPS  RSN HTCAP WME
Tang 2          a8:02:db:f1:b6:2c    6   54M   0:0    100 EPS  WPA RSN WPS HTCAP WME
0x54e1ba        50:0f:f5:35:9b:08    6   54M   0:0    100 EP   HTCAP WPA RSN WME

Note that on FreeBSD 14.0, the S:N has proper values.

The iwm0 driver is recognized as:

iwm0: <Intel(R) Dual Band Wireless AC 8265> mem 0xdd100000-0xdd101fff at device 0.0 on pci58
iwm0: hw rev 0x230, fw ver 22.361476.0, address 98:2c:bc:36:61:e5

FYI, the fw version is identical to the one on FreeBSD 14 (different Laptop though).

I can connect to the network with iwm0. Just wondering if the access point selection might be sub-optimal
if S:N is unknown, or it might be just a "display" problem.

Tested it both on 6.4-STABLE and latest HEAD revision of master branch.



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