Ding! We have a winner. ○ → ./dispwin -c -D5 Found 2 screens new_dispwin: CGDisplayGammaTableCapacity = 1024 new_dispwin: found pixel depth 10 bits new_dispwin: CGDisplayModePixelEncoding = '--------RRRRRRRRGGGGGGGGBBBBBBBB' Dispwin: Warning - new_dispwin: frame buffer depth 8 != GammaTable depth 10 dispwin_get_ramdac called dispwin_get_ramdac returning OK Saved original VideoLUT new_dispwin: return sucessfully dispwin_set_ramdac called Set_ramdac persist Current profile path = '/Users/mwdiers/Library/ColorSync/Profiles/display1-427c3e6032c170b8ca110dfa990d74e8.icc' Renamed current profile '/Users/mwdiers/Library/ColorSync/Profiles/display1-427c3e6032c170b8ca110dfa990d74e8.icc' to '/Users/mwdiers/Library/ColorSync/Profiles/display1-427c3e6032c170b8ca110dfa990d74e8.icc.orig' Restored '/Users/mwdiers/Library/ColorSync/Profiles/display1-427c3e6032c170b8ca110dfa990d74e8.icc.orig' back to '/Users/mwdiers/Library/ColorSync/Profiles/display1-427c3e6032c170b8ca110dfa990d74e8.icc' dispwin_set_ramdac returning OK dispwin_del called dispwin_set_ramdac called dispwin_set_ramdac returning OK dispwin_set_ramdac called dispwin_set_ramdac returning OK Restored original ramdac Now to see if I can use the i1 Display Pro and make this work. I’ll let you know. On Oct 20, 2013, at 7:36 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote: > Martin Diers wrote: > >> new_dispwin: CGDisplayModePixelEncoding = '--------RRRRRRRRGGGGGGGGBBBBBBBB' >> new_dispwin: CGDisplayGammaTableCapacity = 1024 > > Hmm. Well it seem that 10.9 is giving us contradictory information. On the > one hand > it's saying that the frame buffer is 8 BPP, and on the other hand it's saying > that the VideoLUT tables have 1024 entries. That leaves us guessing as to > what's actually going on. Is the frame buffer really 8 bits and only 256 > entries of the VideoLUT is being used ? If so, which entries ? The top > 256, the bottom 256 of something else ? Or is the frame buffer really 10 bits > deep ?? > > We're not likely to get any answer from Apple, so we're left with guessing + > trial > and error. > > I've modified these: > <http://www.argyllcms.com/disptools_osx64.tgz> > to believe the VideoLUT depth information. See > what happens. > > Graeme Gill. > > >