On Tue, May 7, 2013 at 2:34 PM, Ross Walker <rswwalker at gmail.com> wrote: > On Mon, May 6, 2013 at 4:47 PM, Fred Smith <fredex at fcshome.stoneham.ma.us>wrote: > >> I was just handed a 2nd monitor for my system at work, and using Centos 5 >> (latest) >> can't make dual head work. a good bit of googling isn't being particularly >> helpful either. >> > > Dual head or dual monitor? > > Dual head typically means running two instances of X, one on each video > out, which can only be done with two or more graphic cards from what I can > gather. > > > >> It's a HP workstation xw4100, with Nvidia Quadro NVS280SD graphics card. >> Enabling dual head in the "display" app simply configures X so that it >> (i.e., X) won't start. I haven't found the x log file in /var/log to be >> helpful, either. This is using the legacy 96.x.x driver from Nvidia. >> >> the NvidiaDetect app (from epel) says it should be using a newer driver >> than the 96.x.x (forgot which one, exactly) but when attempting to install >> it I get a msg that the card requires a 96.x.x driver. >> >> browsing to nvidia.com and entering the model numbers into their driver >> finder app gives another newer version that also gives the same result. >> So it looks like I'm stuck with the 96.x.x driver. >> >> some googling indicates a few people have made it work, but none of their >> methods are working for me. >> >> I was beginning to wonder if the hardware even supported dual head, so I >> booted up a Fedora 17 LIVE CD. it initializes both monitors with no action >> from me at all, with a desktop spanning the two screens, just fine. It >> must >> be using the Nouveau driver (which, AFAIK, can't be used on Centos 5), >> so still the issue could either be spanning/dual head doesn't work with >> the >> ancient nvidia driver, or we (neither me, nor the tools on Centos) knows >> how to configure it. >> >> Clues would be appreciated. thanks in advance! >> > > In my experience I was able to drive both the DisplayPort and DVI (or HDMI > and VGA) interfaces off my card to give me dual monitor support. > > To setup the monitor preference I just created a monitors.conf file in > /etc/X11/xorg.conf.d as such: > > Section "Monitor" > Identifier "HDMI1" > Option "Primary" "true" > EndSection > > Section "Monitor" > Identifier "VGA1" > Option "RightOf" "HDMI1" > EndSection > > Substitute the Identifier for whatever 'xrandr' gives you, and use LeftOf > if you secondary monitor is left of your primary. > Nevermind, I am not paying attention here, my setup is C6 with Intel. -Ross