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Thread: xorg.conf for dual monitors in 12.04LTS

  1. #1
    Join Date
    May 2012
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    40

    xorg.conf for dual monitors in 12.04LTS

    Hi,

    I'm trying to set up dual Dell Ultrasharp u2311h (23 inch, 1920x1080) monitors with my ubuntu 12.04 partition. I'm running a Radeon 7970HD graphics card with the fglrx drivers (from the ati website), and for some reason my xorg.conf file keeps messing up. Every time I back up xorg.conf, delete it and reboot it seems to works fine. The only problem is that every time I reboot after that, it tends to hang on a black screen with a blinking cursor, forcing me to manually reboot into safemode, delete the file and reboot again.

    Does anyone have any idea how to properly set up the xorg.conf file for the system that I have - and more importantly keeping the file from changing every time I reboot?

    Thanks for any help!

  2. #2
    Join Date
    Jul 2008
    Location
    The Left Coast of the USA
    Beans
    Hidden!
    Distro
    Kubuntu

    Re: xorg.conf for dual monitors in 12.04LTS

    When you installed the driver from the AMD site, did you just use the .run file, or did you follow instructions for creating a .deb?

    Do you have a single graphics card, hybrid Intel/ATI or dual ATI/ATI graphics?

    Did you run

    Code:
    sudo aticonfig --initial
    for a single card or

    Code:
    sudo aticonfig --adapter=all --initial
    if ATI/ATI dual graphics?

  3. #3
    Join Date
    May 2012
    Beans
    40

    Re: xorg.conf for dual monitors in 12.04LTS

    I have a single graphics card, and no I don't think I configured it after I ran it. Wouldn't I have had issues if I didn't? My single monitor setup was working just fine without having to do all of this.

  4. #4
    Join Date
    May 2012
    Beans
    40

    Re: xorg.conf for dual monitors in 12.04LTS

    I tried the command but it's a no-go. It always gets goes to a black screen with various checks on it (ssh, battery, etc..). It always gets stuck on:
    "stopping system v runlevel compatability."

    Any idea what's going on? I can post my xorg.conf if that helps.

  5. #5
    Join Date
    Oct 2011
    Location
    Canada
    Beans
    951
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: xorg.conf for dual monitors in 12.04LTS

    Yes, post up the one you modified but screws up after reboot.
    613websites.com Canadian Web Design and Hosting

  6. #6
    Join Date
    May 2012
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    40

    Re: xorg.conf for dual monitors in 12.04LTS

    This is located in /etc/x11 :

    Code:
    Section "ServerLayout"
    	Identifier     "amdcccle Layout"
    	Screen      0  "amdcccle-Screen[1]-0" 0 0
    	Screen         "amdcccle-Screen[1]-1" RightOf "amdcccle-Screen[1]-0"
    EndSection
    
    Section "Files"
    EndSection
    
    Section "Module"
    	Load  "glx"
    EndSection
    
    Section "ServerFlags"
    	Option	    "Xinerama" "on"
    EndSection
    
    Section "Monitor"
    	Identifier   "0-DFP1"
    	Option	    "VendorName" "ATI Proprietary Driver"
    	Option	    "ModelName" "Generic Autodetecting Monitor"
    	Option	    "DPMS" "true"
    	Option	    "PreferredMode" "1920x1080"
    	Option	    "TargetRefresh" "60"
    	Option	    "Rotate" "normal"
    	Option	    "Disable" "false"
    EndSection
    
    Section "Monitor"
    	Identifier   "0-DFP10"
    	Option	    "VendorName" "ATI Proprietary Driver"
    	Option	    "ModelName" "Generic Autodetecting Monitor"
    	Option	    "DPMS" "true"
    	Option	    "PreferredMode" "1920x1080"
    	Option	    "TargetRefresh" "60"
    	Option	    "Rotate" "normal"
    	Option	    "Disable" "false"
    EndSection
    
    Section "Device"
    	Identifier  "amdcccle-Device[1]-0"
    	Driver      "fglrx"
    	Option	    "Monitor-DFP1" "0-DFP1"
    	BusID       "PCI:1:0:0"
    EndSection
    
    Section "Device"
    	Identifier  "amdcccle-Device[1]-1"
    	Driver      "fglrx"
    	Option	    "Monitor-DFP10" "0-DFP10"
    	BusID       "PCI:1:0:0"
    	Screen      1
    EndSection
    
    Section "Screen"
    	Identifier "amdcccle-Screen[1]-0"
    	Device     "amdcccle-Device[1]-0"
    	DefaultDepth     24
    	SubSection "Display"
    		Viewport   0 0
    		Virtual   3960 1080
    		Depth     24
    	EndSubSection
    EndSection
    
    Section "Screen"
    	Identifier "amdcccle-Screen[1]-1"
    	Device     "amdcccle-Device[1]-1"
    	DefaultDepth     24
    	SubSection "Display"
    		Viewport   0 0
    		Depth     24
    	EndSubSection
    EndSection

  7. #7
    Join Date
    May 2012
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    40

    Re: xorg.conf for dual monitors in 12.04LTS

    I've also tried:
    Code:
    dpkg --configure -a
    apt-get update
    apt-get dist-upgrade
    apt-get install lightdm-gtk-greeter
    apt-get clean
    reboot
    Problem persists.

  8. #8
    Join Date
    May 2012
    Beans
    40

    Re: xorg.conf for dual monitors in 12.04LTS

    Interesting thing I found for Radeon 7970HD chip:
    http://wiki.cchtml.com/index.php/Hardware
    ^^ Basically says to use Catalyst 12.1 to be officially supported.

    Anyway, I'm having a hard time uninstalling my previous drivers:

    Code:
      
    sudo sh /usr/share/ati/fglrx-uninstall.sh
    sudo apt-get remove –purge fglrx fglrx_* fglrx-amdcccle* fglrx-dev* xorg-driver-fglrx
    Neither of these commands work, they return errors like "no file or directory", or "could find package...". But what is confusing is that my
    Code:
     fglrxinfo
    tells me that it is installed...

    I really need to get this working, can anybody make any sense of this?

  9. #9
    Join Date
    Nov 2010
    Location
    India
    Beans
    4,840
    Distro
    Ubuntu Development Release

    Re: xorg.conf for dual monitors in 12.04LTS

    Interesting thing I found for Radeon 7970HD chip:
    http://wiki.cchtml.com/index.php/Hardware
    ^^ Basically says to use Catalyst 12.1 to be officially supported.



    +1 , thanks for the info .
    Google First your issue , if no solution then ask.

    రాజ శేఖర్ రెడ్డి

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