if your old CRT monitor displays resolution "800x600" you have to change it into at least 1024x768.LCD & LED monitor displays high resolution so no need to change.
To change screen resolution click on "System" menu --> then "Preferences" --> then select "Monitors"
if your monitor supports 1024x768 resolution then you have to change 800x600 in to it from right top position of the window. do not change refresh rate or any other properties.To apply this click on "apply" button and it will ask to keep this changes every time when you login then click "keep this configuration" and close all windows.
thats all enjoy................
you can try dpkg-reconfigure xserver-xorg to change your display card properties. to do this you need administrative privileges.
To change screen resolution click on "System" menu --> then "Preferences" --> then select "Monitors"
if your monitor supports 1024x768 resolution then you have to change 800x600 in to it from right top position of the window. do not change refresh rate or any other properties.To apply this click on "apply" button and it will ask to keep this changes every time when you login then click "keep this configuration" and close all windows.
thats all enjoy................
you can try dpkg-reconfigure xserver-xorg to change your display card properties. to do this you need administrative privileges.