At 11:13 AM 7/22/2008, you wrote: >On Tue, 22 Jul 2008 06:03:16 -0400 >"William L. Maltby" <CentOS4Bill at triad.rr.com> took out a #2 pencil >and scribbled: > > > I need to start running a dual head on one of my machines. > > Eventual target is CentOS 5.x. Decided to test first on my 4.6 > > setup (eventually it will achieve 5.x). Both machines are fully > > up to date. > > > > The test machine is 4.6, 2 radeon video cards. Searched the web, > > CentOS site, even bugzilla. This bugzilla entry from a 4.2 > > system), http://bugs.centos.org/view.php?id=1875 > > had only a WFM response. > > > > I've attached a gzipped text file of pertinent information. > > > > Briefly, kudzu did the right thing when I installed the second > > card. System-config-display also behaved correctly. X start ok, > > but will only use one head at a time. Adding a second "BusID" so > > that both cards are explicitly addressed didn't help. When the 2 > > "BusID" entries are switched, the active screen doesn't move > > (it's always "Screen0") and the ignored screen ("Screen1") > > remains the same. The monitor attached to the video card for > > "Screen0" becomes the active one. > > > > Q1: Anyone have a two video card CentOS 4.6 setup working? > > > > Q2: Is it working in CentOS 5? > > > > Q3: Anyone see something I'm doing wrong? Suggestions? > > > > TIA, > >This was addressed on the list at one point, and marked as solved >by the poster. > >http://lists.centos.org/pipermail/centos/2007-May/080915.html > >Does this help you out? I haven't had occasion to play with dual >head yet. > >A quick google also turned this up, but it is not directly related >to CentOS, I run an nvidia card and can't speak to how well this >would work for you. > >http://www.linuxine.com/2008/06/how-to-enable-dual-monitors-with-ati-diplay-card-in-linux.html > >Mind the line wrapping. > >HTH > >Alex White Good reading, even though I am not doing dual-head at the moment. First thing that popped in my head upon reading the initial request was check Matrox.. they've always been on the high-end and I knew their graphics cards were well supported in Linux. Shop eBay and see Matrox' site (http://www.matrox.com/graphics/en/support/drivers/) to compare whether the card has a Linux driver. Many of their models are dual-head on one card. Cheers, Glenn