If you are using a Mac® with an HDMI video port and the video seems too dark, enable DVI Compatibility Mode on the CIM to help resolve the issue.
See Configuring CIM Ports
See Also
Video Mode and Resolution Notes
Video Shrinks after Adjusting Target Clock
Black Stripe/Bar(s) Displayed on the Local Port
Sun Composite Synch Video
SUSE/VESA Video Modes
