Thank you,
Iv'e found this site with info about "xrandr"
http://www.ubuntugeek.com/how-change-display-resolution-settings-using-xrandr.html

I think I'm going to install Ubuntu 14.04 LTS again (because it was working with this OS) and view the "xrandr" settings after this I shall install Trisquel 7.0 again and check were are differences in the settings and adjust them

Reply via email to