[Bug 1214] [ATI/radeon] Xinerama/Multi head fails on a dual Appian radeon card (4 outputs)

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https://bugs.freedesktop.org/show_bug.cgi?id=1214          
     

rbeyer at rossbeyer.net changed:

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------- Additional Comments From rbeyer at rossbeyer.net  2005-03-30 12:24 -------
I have encountered a similar problem on my system.  I have an ATI Fire GL Z1 
card with dual DVI outs.  When I use a Dual-headed layout, I get a desktop on 
the primary monitor, and the secondary monitor indicates that it is getting 
some kind of signal, but the screen remains blank.  My Xorg.0.log file 
indicates that it is getting EDID data from the second port, but then it gives: 
 
(WW) RADEON(0): Failed to detect secondary monitor, MergedFB/Clone mode 
disabled 
 
I was hoping that 6.8.2 would fix it, but it doesn't.  Like the Fedora bug, I 
tried goofing with MergedFB, DDCon, and MonitorLayout, but to no avail 
(however, I may just not know how all of that stuff fits together, the radeon 
man page is descriptive, but a how-to would be nice). 
 
The kicker is that on a previous computer (with the same ATI card) last fall 
(Xorg from September 2004, don't know the version), the dual-head worked just 
fine. 
 
I'm happy to upload log files and configuration files, if that is needed. 
           
     
     
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