Bug 106011

Summary:	mac80211: Log spam "wlan0: Limiting TX power to" - MWG100250701
Product:	Drivers	Reporter:	Andreas Kloeckner (inform)
Component:	network-wireless	Assignee:	DO NOT USE - assign "network-wireless-intel" component instead (linuxwifi)
Status:	CLOSED CODE_FIX
Severity:	low	CC:	johannes, linville
Priority:	P1
Hardware:	Intel
OS:	Linux
Kernel Version:	4.2	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	patch to limit the message

Description Andreas Kloeckner 2015-10-15 22:43:10 UTC

I get this in my dmesg:

[52464.041250] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb
[52464.707059] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb
[52465.168531] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb
[52465.203857] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb
[52465.247743] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb
[52465.257956] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb
[52465.268810] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb
[52465.306069] wlan0: Limiting TX power to 23 (23 - 0) dBm as advertised by 00:0c:e6:9a:26:bb

As you can see, I get about 6 or 7 lines of this type every second. This somewhat limits the usefulness of "dmesg" as it now only reaches back a few minutes. In addition, while easily compressed, do fill up my disk (by way of syslog)

Comment 1 Johannes Berg 2015-11-23 09:02:56 UTC

Created attachment 195221 [details]
patch to limit the message

Please try this patch.