Okay thank you guys.
It works with changing the default video mode via the Launch configuration tool (´X` during Game load).
I use DMT-4 640×480 @ 60Hz, clock:25MHz progressive
All other defaults are not working.
In gles2n64.conf seems everything okay. Same resolution: 640×480 picture centered…
It is only the sound that is not working in the emulator.
23:30 Sound problem also solved.
changed in mupen64plus.conf
#Audio output to go to (0) Analogue Jack (1) HDMI
OUTPUT_PORT=0
(I have to active PC loudspeakers connected using the audio jack)