On Wed, Nov 11, 2009 at 9:29 PM, Csillag Kristof <csillag.kris...@united-consult.hu> wrote: > Alex Deucher wrote: >> Does adjusting the gamma on the problematic head help? > > If I understand your question correctly, you suggest that the gamma > correction function might be off. > > I don't think this is the case, because on my monitor, the relation > between (at least) the blue part of the pixel data and the actually > displayed color seems to be a non-monotonic function. > > See the photo I made about the color selection dialog from GIMP. > (Before taking the picture, I stretched it out horizontally for best > visibility.) > > On proper head: > http://picasaweb.google.com/lh/photo/OB7B3DgO3LKLmL4NUxx5Jw?authkey=Gv1sRgCM60oc7kuoW24gE&feat=directlink > > On bogus head: > http://picasaweb.google.com/lh/photo/ZRIy7uJmmPmVWxEcSmVTKg?authkey=Gv1sRgCM60oc7kuoW24gE&feat=directlink > > The current setting is 0000FF (RGB), and as you can see, the gradient > from 000000 to 0000FF (the 6th line, besides letter B), and > the one from 0000FF to 00FFFF (the 5th line, besides letter G) > are messed up in creative ways. (They should be monotonic, but they are > not.) As far as I can tell, wrong gamma does not do that; it does not > introduce non-monotonic transformations. > > It looks almost as if some bits of the blue data were sometime lost in > transition. (But where?)
Is the problematic screen the one driven by DVO or internal tmds? Post your Xorg log and specify which output is the problematic one (DVI-0 or DVI-1). Alex _______________________________________________ xorg mailing list xorg@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/xorg