On Wed, 8 Jan 2020, E. Liddell wrote: > On Wed, 8 Jan 2020 16:38:32 +0100 (CET) > Felmon Davis <moelmoel2714@...> wrote: > >> 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. > > My guess is that you did something awkward to the color profile or > gamma correction. No idea where that information is stored, though--I'd > probably resort to grepping through likely directories looking for > "[Cc]olor". If it affects only a specific user, then the setting is probably > in your home directory, since most distros don't like mingling user settings > with general system settings. just a quick general update. I set up a second user which, it turns out, is not affected by the psychedelia. it had the side-benefit of eliminating pretty much all the font size and dpi-related problems I had except for an oddity or two under Firefox which could be fixed by adding some code to userChrome.css. this reign of peace and clarity has been so captivating that I haven't yet gone back to diagnose the problems of the first user setup. I do believe that once the psychedelic effects did occur under user #2 but I was nimble enough not to 'save configuration' of TDERandRTray which is probably the trouble-maker I've been advised and not xrandr. I may see it it's true that the effect can be generated under user #2 also. and I'll do a little experimenting under user #1 to find the cause of the problem there. I may settle in with user #2 but then I'd (at some risk) shift GID's and UID's to get back to the former username. thanks all. f. -- Felmon Davis Verbum sat sapienti.