(In reply to Takashi Iwai from comment #16) > BTW, when you boot with another desktop environment (such as icewm), does > the problem persist? I mean not to log out and switch from KDE, but login > directly to icewm session (which should be available as fallback) at boot. I enabled icewm to load instead of Plasma at boot, but still NO Signal when turning on monitor after boot I am afraid.