It complained about not supporting my color depth (although nvidia-settings is set to 24 bit). before (last 100 chars): we only support 24/32-bit displays righ

It complained about not supporting my color depth (although nvidia-settings is set to 24 bit). before (last 100 chars): we only support 24/32-bit displays right now. XF86VidModeGetGammaRampSize returned 2048 entries. xflux does the same. It's a new laptop - i7 in 64bit mode, so I don't know if that's at fault. I loved xflux on the old (32bit, nvidia) laptop, though. Redshift as mentioned by paulsmith works great.