I am currently on Check_MK Raw or CRE version 1.5.0P11. This issue was still on 1.5.0P9 as well.
For Windows machines with the agent and no SNMP and also Linux with Agent and no SNMP I am getting this CRIT on Check_MK Discovery. I have tried making it postive with the rule but then the discovery starts to time out. I have tried marking with no SNMP and still same issue. I go to WATO and do the save and test and it just shows snmp being timed out with exit code 1. It gets the data from the client.
Here is what I get for Check_MK Service (OK)
OK - [agent] Version: 1.4.0p31, OS: linux, [snmp] Success, execution time 0.1 sec
Here is what I get for Check_MK Discovery (Crit)
CRIT - no unmonitored services found, no vanished services found, [snmp] Cannot fetch system description OID .126.96.36.199.188.8.131.52.0. This might be OK for some bogus devices. In that case please configure the ruleset “Hosts without system description OID” to tell Check_MK not to fetch the system description and system object OIDs.