screen color distortion after xrandr

greets! I was trying to get a second monitor (a tv) to work using xrandr. I noticed that the screen on the laptop would suffer severe, almost 'psychedelic', effects if I hit a certain setting. unfortunately I don't recall the setting but the ill effect was consistent and rendered the disply nearly unreadable. and the only solution was to end the session. then by accident I hit the 'save this configuration' key and now the setting is permanent. btw I created a second user and it doesn't suffer from the problem. I cannot find a way to restore the proper display setting. I have been told there is no way to save configuration built into xrandr so (I guessed) the configuration must be stored by the TDERandRtray application. but I don't see anything in '/root/.trinity/share/config/tderandrtrayrc' and besides, if there were, it should affect the second user too. it's an Asus Zenbook with Intel HD graphics. I am considering shifting to the second user and grappling with the UID and GID changes though I ultimately want to resurrect the original username. thank you for any help. f. -- Felmon Davis Verbum sat sapienti.