AS I said in the description of the problem, I speak about a desktop not a laptop and the monitor is connected to the Intel IGP not to the Nvidia DGP. I assume this case is not a case well managed by the PRIME Technology. Nevertheless Suse Prime is in the good state "you use currently Intel". I checked after update in the text console with "prime-select intel" that intel adapter is already selected. Today in Konsole if I type "prime-select get-current" I get "Driver configured: undefined"