The file /var/lib/sensord.rrd is getting filled with following errors: Jul 10 07:07:00 praprama-2130-2-ftd sensord: Error updating RRD file: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd: /var/lib/sensord.rrd:Jul 10 07:07:00 praprama-2130-2-ftd sensord: rrd update error (-1) The version of lm-sensors with have in WRL8 is 3.3.2 and this gets fixed in 3.3.3-1 (Which seems to be related to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=614965. ). https://launchpad.net/ubuntu/+source/lm-sensors/1:3.3.3-1ubuntu1