Bug 2309148

Summary: A massive amount of syslog spam
Product: [Fedora] Fedora Reporter: Artem S. Tashkinov <aros>
Component: wpa_supplicantAssignee: Lubomir Rintel <lkundrak>
Status: CLOSED NEXTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 40CC: bgalvani, dcaratti, dcbw, kanru, lkundrak, vaishnavyo12345
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Hardware: x86_64   
OS: Linux   
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Last Closed: 2024-12-29 11:55:15 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Artem S. Tashkinov 2024-09-02 11:24:52 UTC 
I've suddenly realized wpa_supplicant is spamming my system logs with these messages:

Sep 02 08:07:17 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-64 noise=9999 txrate=648500
Sep 02 08:07:20 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-58 noise=9999 txrate=648500
Sep 02 08:07:23 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-58 noise=9999 txrate=648500
Sep 02 08:07:26 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-64 noise=9999 txrate=648500
Sep 02 08:07:29 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-64 noise=9999 txrate=432300
Sep 02 08:07:32 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-63 noise=9999 txrate=432300
Sep 02 08:07:35 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-63 noise=9999 txrate=576400
Sep 02 08:07:38 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-64 noise=9999 txrate=576400
Sep 02 08:07:41 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-64 noise=9999 txrate=576400
Sep 02 08:07:44 elite wpa_supplicant[3054]: wlp1s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-63 noise=9999 txrate=576400

I want this to stop. My WiFi works perfectly but these seemingly debug messages drive me insane and generate over 2GB of disk writes daily.

For the past three days:

journalctl | grep CTRL-EVENT-SIGNAL-CHANGE | wc -l
24500

Components used:

NetworkManager-1.46.2-1.fc40.x86_64
wpa_supplicant-2.11-3.fc40.x86_64
kernel-6.10.7-200.fc40.x86_64

I posted a solution here but I hate it:

https://unix.stackexchange.com/questions/782886/how-to-stop-ctrl-event-signal-change-spam-in-system-logs
Comment 1 Artem S. Tashkinov 2024-09-02 11:28:17 UTC 
This was first raised five years ago:

https://groups.google.com/g/beagleboard/c/GzAMt9MFzC4

And then repeated multiple times with no resolutions:

https://discussion.fedoraproject.org/t/how-to-debug-lots-of-wlp2s0-ctrl-event-signal-change-messages-on-journalct/72555
https://www.google.com/search?q=%22CTRL-EVENT-SIGNAL-CHANGE+above%3D1%22

Just pure bonkers.
Comment 2 Kan-Ru Chen 2024-12-29 00:02:57 UTC 
I made a patch and it was applied upstream https://w1.fi/cgit/hostap/commit/?id=c330b5820eefa8e703dbce7278c2a62d9c69166a
Comment 3 Artem S. Tashkinov 2024-12-29 11:55:15 UTC 
Thanks a TON!
Comment 4 Davide Caratti 2025-04-15 07:59:48 UTC 
*** Bug 2317546 has been marked as a duplicate of this bug. ***