libgamma-intl An extension with support for text description of constants and internationalisation. Unsupported display servers: GNU Hurd TTY Does it have gamma ramp support? The BSD TTY:s Do they have gamma ramp support? Haiku Haiku does not have gamma ramp support Wayland I do not think Wayland have gamma ramp support Mir I do not think Mir have gamma ramp support Adjustments in Quartz are reverted when the process exits, this information must be available in the method capabilities. Gamma ramp support test should return yes, no or maybe.