This seems to be resolved now. There is no longer problem with increasing the volume on keyboard, also the OSD works. This puzzles me, I don't know where could have been the problem? Anyway, now it's OK.
This seems to be resolved now. There is no longer problem with increasing the volume on keyboard, also the OSD works. This puzzles me, I don't know where could have been the problem? Anyway, now it's OK.