Bug 205691

Summary: 5 GHz Wi-Fi frequently deauthenticates with reason 2=PREV_AUTH_NOT_VALID
Product: Networking Reporter: Mikhail Zabaluev (mikhail.zabaluev)
Component: WirelessAssignee: networking_wireless (networking_wireless)
Status: NEW ---    
Severity: normal CC: linuxwifi
Priority: P1    
Hardware: x86-64   
OS: Linux   
See Also: https://bugzilla.redhat.com/show_bug.cgi?id=1751511
Kernel Version: 5.3.12-300.fc31.x86_64 Subsystem:
Regression: No Bisected commit-id:
Attachments: journal logs of a deauthenticaction

Description Mikhail Zabaluev 2019-11-28 12:41:27 UTC
Created attachment 286103 [details]
journal logs of a deauthenticaction

With an Intel Wireless-AC controller, I frequently experience deauthentication events with the effect that NetworkManager asks for the PSK despite it being valid on the AP. This may be associated with hopping between two bands on the same physical AP using the same PSK. Whether band steering is used with the same ESSID, or different ESSIDs are used for the two bands, does not seem to make much difference.

lspci output:

00:14.3 Network controller: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] (rev 30)
	Subsystem: Intel Corporation Device 0034
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

Driver initialization on boot:

[   11.291730] kernel: iwlwifi 0000:00:14.3: loaded firmware version 46.6bf1df06.0 op_mode iwlmvm
[   11.531768] kernel: iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318

== Access point information ==

Product Vendor: Technicolor
Product Name: Telia WiFi-router Plus v3
Software Version: 17.2
Firmware Version: 17.2.0339-1441028-20180416152341
Hardware Version: VBNT-H
Comment 1 Mikhail Zabaluev 2019-11-28 13:07:57 UTC
Station information when connected after some occurrences:

# iw dev wlp0s20f3 station dump
Station [REDACTED] (on wlp0s20f3)
	inactive time:	429 ms
	rx bytes:	33123419
	rx packets:	63482
	tx bytes:	7826384
	tx packets:	43111
	tx retries:	6044
	tx failed:	62
	beacon loss:	33
	beacon rx:	38
	rx drop misc:	1332
	signal:  	-21 [-32, -21] dBm
	signal avg:	25 dBm
	beacon signal avg:	-25 dBm
	tx bitrate:	866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2
	rx bitrate:	585.1 MBit/s VHT-MCS 6 80MHz short GI VHT-NSS 2
	rx duration:	0 us
	authorized:	yes
	authenticated:	yes
	associated:	yes
	preamble:	long
	WMM/WME:	yes
	MFP:		no
	TDLS peer:	no
	DTIM period:	2
	beacon interval:100
	short preamble:	yes
	short slot time:yes
	connected time:	9397 seconds