When moving some Sun Solaris servers to a new server room with a new KVM solution (Raritan Paragon 2) we had difficulty getting the Sun servers to display on the KVM. Keyboard seemed to work fine but the display would not.
The issue seems to be with the default screen display resolution used on the Sun machines which is 1152×870 with a refresh rate of 66 or 76. Setting a lower resolution sorted the problem out but there is no obvious way to reset the resolution. To do so go to the Boot Prom and enter the following at the ‘ok’ prompt:
setenv output-device screen:r1024x768x75
then
reset-all
Using
printenv
will then display the environment variables including the newly created output-device one.
With Solaris you can check the current resolution with:
fbconfig -prconf
