The problem is likely caused by PANEL_FORMAT@FP_GEN_CNTL (bit 3) not being set correctly. Radeon cards support 18 and 24 bit panel formats. With panels supporting EDID 1.x, there is no way from EDID data to tell what the actual panel format is. In this case, we can set PANEL_FORMAT to 1 (24 bit). 18 bit panels should be able to handle 24 bit format by truncating the data. With panels supporting EDID 2.0, the panel color depth can be derived from color/luminance description field, but I'm not sure if this is really worth of doing. Simply setting PANEL_FORMAT to 1 will probably work on most of panels. In case some 18 bit panels cannot handle 24 bit format correctly, perhaps we can use DAC_6BIT option to overwrite it (I know the name of this option doesn't make sense here, since digital panel doesn't use DAC).
Hui > I have been able to reproduce this problem on a DFP with a Radeon VE. > I'll be looking into the problem and let you know what I find. > > Kevin > > On Sun, Oct 27, 2002 at 02:01:09PM +0100, Christof Ameye wrote: > > I can confirm: I have the same problem with my Radeon 8500 DVI output to > > my 18" LCD. If I use the analog output, it works fine: full 24 bit. But > > that's not an option if you have DVI. Same applies for my tests with > > windows: DVI delivers perfect 24 bit display in MS windows. > > > > It must be a radeon driver problem. At the highest resolution I also > > have this problem: one missing vertical pixel line around pixel column > > +-1024 (not a black line, really a missing line), which I again don't > > have in windows. It really it is strange around so if you have a 'd' on > > the screen with the long bar being on column 1024, it simply looks like > > a 'c' ! > > > > Christof > > > > Holger Isenberg wrote: > > On Sat, 26 Oct 2002, Mark Vojkovich wrote: > > > > > You guys are likely misinterpreting what you are seeing. Most > > > digital flat panels are only 6 bits per component! > > > > Yes, I know. But the Compaq TFT7010 is not, that's why I choose it. > > With Windows98 it shows true 24bpp colors on the same machine. > > > > -- > > Holger Isenberg > > [EMAIL PROTECTED] > > http://mars-news.de > > > > _______________________________________________ > > Xpert mailing list > > [EMAIL PROTECTED] > > http://XFree86.Org/mailman/listinfo/xpert > > > > > > > > > > _______________________________________________ > > Xpert mailing list > > [EMAIL PROTECTED] > > http://XFree86.Org/mailman/listinfo/xpert > _______________________________________________ > Xpert mailing list > [EMAIL PROTECTED] > http://XFree86.Org/mailman/listinfo/xpert > _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
