Steve, Here are some basic steps to check if the dual head will actually work or not. Make sure this works before trying xinerama.
Please reply leting me know your progress at each step.. e.g. STEP 2: Run dual..... Work OK, but only low res. Take the following one step at a time, this way you will know if things actually work. By the looks of it you have been leaping to the last step without actually making sure a standard dual head display works. This is for Redhat 7.1/7.2/7.3 STEP 1: Switch to runlevel 3 As root..... telinit 3 STEP 2: Run the dual head setup utility. As root..... xf86cfg If you have, did it make both displays work??? Dont worry about setting up positions/resolutions etc yet. Note: if you have a wheel mouse, run setup and select a standard 2/3 button mouse before running xf86cfg. STEP 3: Copy the Config files xf86cfg creates the file "XF86Config" in the "/root/" directory. That needs to be copied TWICE to "/etc/X11/" like so... as root.... cp /root/XF86Config /etc/X11/XF86Config cp /root/XF86Config /etc/X11/XF86Config-4 STEP 4: Restart X As root..... telinit 5 STEP 5: Login At the graphical login menu select KDE as your session and login as a normal user. KDE 3 recognises dual head setups and should start up 2 desktops (Im not sure about gnome) but it doesnt let you "span" windows across the display, I think they are working on it in the later versions. STEP 6: Try xinerama If you have got this far, then you have a dual head operational, it may not be at the resolution you want, but it is working. Now is when you can try xinerama to make sure it actually works. I have not tried this myself and dont have the time at the moment. Some possibly helpful documents re xinerama..... http://www.tldp.org/HOWTO/Xinerama-HOWTO.html STEP 7: Resolution/Monitor position etc Now is the time to work on resolutions etc. If you managed to get a dual head working before trying xinerama then it should be possible to get it working properly. The XFree86 team have had an array of 4x4 displays working off 1 PC. I also know a university in Texas has an 8x8 array of video projectors working, but that was using multipule dual head video cards, and more than one PC. Both of these were using modern video cards though. Mike. --------------------- !!!! Linux Rocks !!!! ---------------------
