I'm not so sure this is a xorg problem. I've got a sinking feeling it's something else that may be more difficult to track down. I've
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enabled. Checking with glxinfo shows it not on and using Mesa. Also, glxgears is painfully slow.
You made it too hard. The latest xorg-server update had a postin script that rewrote your xorg.conf and changed the fglrx to radeon. The good part is that it saves the original to another xorg.conf.xxxxxxx file Don't remember the name off-hand. Changed it to that one and the system is back to normal.
Thanks Mike, I wish it were that easy. I had already checked the xorg.conf file as well as replaced it with a known good one. Plus, I have reconfigured more than once to get a new xorg.conf file running sax2. Checking those things have been part of the process I've been through thus far. As I mention above, the logs show no errors, that I've detected and dri as being enabled, but it's a different story when KDE boots.
I spent a lot more time on this last night, and what I thought fixed it didn't. I'm in almost the exact same situation as you Lee.... my video was working perfectly using nVidia's drivers in dualhead mode. I had saved the known good working config on a sep drive (just for the inevitable need for a backup). After the YOU update, and a reboot (which took me about a week before I rebooted) the graphics were hosed. I have a dual monitor setup using nVidia's Twinview options. It used to work perfectly - I had full 3D accelleration on both montiors etc. Now, I don't have any 3D accel at all, and only one monitor is working.. the second monitor is being driven out of range. I found a xorg.conf.post_x11-server file in my /etc/X11 which appeared to be a backup of my previously working xorg.conf - although, a diff on this file and the current xorg.conf shows no differences. I made a backup of the "broken" xorg.conf file and copied the xorg.conf.post_x11-server file over it. Restarted X and still broken. Found my last known working xorg.conf file and copied that over... restarted X. Still broken. I even went so far as to reboot - just in case something would triigger that was being missed while going from init 5 to init 3 and back to init 5. Nothing... I know the hardware is working fine. I can swap monitors and whichever monitor is plugged into Monitor0 on the video card works fine. I can boot to Windows and dual monitor works perfectly there.... so it's definitely a Linux thing, and the ONLY change I made recently was a YOU update. At a loss here... not sure where to go next with finding the problem... reinstalling xorg off the DVD? Prob break a couple dozen dependancies on the 3rd party KDE builds I use (whice were installed a few weeks ago, and I had restarted X several times since the last KDE update with no video issues, so it isn't the KDE update that is causing the problem) C.