[collectd] sensors and wireless don't work as expected

Ondřej Válek ondrej at valek.net
Wed Mar 19 09:59:46 CET 2008

I've just upgraded to collectd v.4.3.0 (in Debian) and few things
stopped working.

Sensors plugin
collectd says in the log:
[2008-03-19 00:45:21] sensors plugin: lm_sensors reports no features.
Data will not be collected.
[2008-03-19 00:45:21] read-function of plugin `sensors' failed. Will
suspend it for 10 seconds.

and doesn't create any sensors-related rrd files, while with previous
version of collectd it worked correctly.
output of sensors binary looks like this (it's a VIA EPIA motherboard):

Adapter: ISA adapter
VCore1:      +1.03 V  (min =  +1.30 V, max =  +1.39 V)
+5V:         +5.11 V  (min =  +4.75 V, max =  +5.25 V)
+12V:       +11.49 V  (min = +10.77 V, max = +13.21 V)
+3.3V:       +3.27 V  (min =  +3.13 V, max =  +3.47 V)
in6:         +0.00 V  (min =  +0.00 V, max =  +0.00 V)
fan1:          0 RPM  (min =    0 RPM, div = 2)
fan2:          0 RPM  (min = 3006 RPM, div = 2)
Int Temp:    +67.1°C  (high = +67.1°C, hyst = +67.1°C)
Proc Temp:   +44.9°C  (high = +65.0°C, hyst = +59.9°C)

I'm happy to see this new plugin to monitor my wifi signal. But as it
seems, noise doesn't work for me.
signal_noise.rrd and signal_power.rrd contain exactly the same values,
which correspond to real signal power (around -76 dBm).

output of iwconfig wlan0 is like:
wlan0     IEEE 802.11b  ESSID:"tovar"
           Mode:Managed  Frequency:2.437 GHz  Access Point:
           Bit Rate:11 Mb/s   Sensitivity=1/3
           Retry limit:20   RTS thr:off   Fragment thr:off
           Encryption key:ABC1-23CB-A1   Security mode:restricted
           Power Management:off
           Link Quality=21/70  Signal level=-76 dBm  Noise level=-98 dBm
           Rx invalid nwid:0  Rx invalid crypt:1214507  Rx invalid frag:0
           Tx excessive retries:15  Invalid misc:20574539   Missed beacon:0

My colletcd.conf looks like this:

FQDNLookup true

LoadPlugin cpu
LoadPlugin df
LoadPlugin interface
LoadPlugin irq
LoadPlugin load
LoadPlugin logfile
LoadPlugin memory
LoadPlugin ping
LoadPlugin processes
LoadPlugin rrdtool
LoadPlugin sensors
LoadPlugin swap
LoadPlugin wireless

<Plugin interface>
         Interface "wlan0"
         IgnoreSelected false

<Plugin logfile>
         LogLevel "debug"
         File "/var/log/collectd.log"
         Timestamp true

<Plugin ping>
     Host "ondra.valek.net"
     Host "lo4.bras2.prg.vol.cz"
     Host ""

<Plugin rrdtool>
         DataDir "/var/lib/collectd/rrd"

Is there any bugzilla for collectd to report this problem?
Thanks in advance.

Ondrej Valek

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