Termperature monitor graphs issue and rrdtool crashes

I am new to NMS and still learning on how things work. I wanted to monitor the temperature of some servers and field devices but in LIbrenms i have all other graphs working expect for the temperature graphs and i am not sure why.

at times there is crash in ubuntu and i have tried reinstalling it many time and the issue still reappears. I have attached the screenshot Crash-log.

crash log 1

One of the HP servers has a ILO and also tried with IPMI and even that coudnt get the temperature working.

Attached the validate screenshot.


Thanks in advance.