Dualhead: Separate X session isn't really separate

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Dualhead: Separate X session isn't really separate

Postby schwim on Mon Jun 01, 2009 3:16 pm

Hey there everyone,

I installed the nvidia drivers and used the nvidia control panel applet to edit xorg.conf for dualhead use. I saved and rebooted. On reboot, monitor 0 and 1 both activate(yay!), but I can't actually do anything in monitor 1(boo!). Trying to move an application over to 1 doesn't work(because it's a separate x session), so I tried adding a mint menu to the task bar. When I click on the menu on the taskbar in monitor 1, it opens in monitor 0. Other than adding taskbars, I can't actually do anything in monitor 1.

Here's my xorg.conf generated by the nvidia applet:

Code: Select all
 nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 1.0  (buildd@palmer)  Sun Feb  1 20:21:04 UTC 2009

Section "Monitor"
   Identifier     "Monitor0"
   VendorName     "Unknown"
   ModelName      "Proview"
   HorizSync       30.0 - 80.0
   VertRefresh     60.0 - 75.0
   Option         "DPMS"
EndSection

Section "Monitor"
   Identifier     "Monitor1"
   VendorName     "Unknown"
   ModelName      "Proview"
   HorizSync       30.0 - 80.0
   VertRefresh     60.0 - 75.0
   Option         "DPMS"
   # HorizSync source: edid, VertRefresh source: edid
EndSection

Section "Screen"
   Identifier     "Screen0"
   Device         "Device0"
   Monitor        "Monitor0"
   DefaultDepth    24
   Option         "TwinView" "0"
   Option         "TwinViewXineramaInfoOrder" "CRT-0"
   Option         "metamodes" "CRT-0: nvidia-auto-select +0+0; CRT-0: 1024x768 +0+0"
   SubSection "Display"
      Depth       24
   EndSubSection
EndSection

Section "Screen"
   Identifier     "Screen1"
   Device         "Device1"
   Monitor        "Monitor1"
   DefaultDepth    24
   Option         "TwinView" "0"
   Option         "metamodes" "CRT-1: nvidia-auto-select +0+0"
   SubSection "Display"
      Depth       24
   EndSubSection
EndSection

Section "Module"
   Load           "dbe"
   Load           "extmod"
   Load           "type1"
   Load           "freetype"
   Load           "glx"
EndSection

Section "InputDevice"
   Identifier     "Mouse0"
   Driver         "mouse"
   Option         "Protocol" "auto"
   Option         "Device" "/dev/psaux"
   Option         "Emulate3Buttons" "no"
   Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
   Identifier     "Keyboard0"
   Driver         "kbd"
   # generated from default
EndSection

Section "ServerLayout"
   Identifier     "Layout0"
   Screen      0  "Screen0" 1440 0
   Screen      1  "Screen1" LeftOf "Screen0"
   InputDevice    "Keyboard0" "CoreKeyboard"
   InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Device"
   Identifier     "Device0"
   Driver         "nvidia"
   VendorName     "NVIDIA Corporation"
   BoardName      "GeForce 6800 GT"
   BusID          "PCI:1:0:0"
   Screen          0
EndSection

Section "Device"
   Identifier     "Device1"
   Driver         "nvidia"
   VendorName     "NVIDIA Corporation"
   BoardName      "GeForce 6800 GT"
   BusID          "PCI:1:0:0"
   Screen          1
EndSection

Section "ServerFlags"
   Option         "Xinerama" "0"
   Option   "DontZap"   "False"
EndSection


Could someone help me get dualhead working properly? I'm in need of it quite badly.

thanks,
json
schwim
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Re: Dualhead: Separate X session isn't really separate

Postby Husse on Wed Jun 03, 2009 1:50 pm

Your xorg.conf looks OK
I only have one idea - did you install nvidia-settings?
gksu nvidia-settings is the key to nvidia :)
It must be root to be persistent
Image
Don't fix it if it ain't broken, don't break it if you can't fix it
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Re: Dualhead: Separate X session isn't really separate

Postby schwim on Wed Jun 03, 2009 6:02 pm

Hi there Husse, and thanks very much for your reply.

I used the Nvidia config app that came with the Mint install of the restricted drivers. This is the app that you're speaking of, correct?

thanks,
json
schwim
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Re: Dualhead: Separate X session isn't really separate

Postby Husse on Wed Jun 03, 2009 6:07 pm

Yes - if it's called nvidia-settings
I was not sure if it was installed through the restricted drivers tool - I have ATI now but may go back to nvidia
There is a command line tool called xrandr that may help you but I don't know how easy it is to use
Image
Don't fix it if it ain't broken, don't break it if you can't fix it
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Re: Dualhead: Separate X session isn't really separate

Postby schwim on Fri Jun 05, 2009 12:42 pm

I just wanted to update this.

It's a known bug that was filed 3 months ago and is considered to be of low importance.
schwim
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Re: Dualhead: Separate X session isn't really separate

Postby Husse on Fri Jun 05, 2009 4:36 pm

Oh well - not much we can do - and I was not even near that bug when I looked for solutions....
Image
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Re: Dualhead: Separate X session isn't really separate

Postby schwim on Fri Jun 05, 2009 4:47 pm

I would have never found it had it not been for a friendly pointer at the Ubu forums.

Grabbing a copy of Fedora 11 preview and going to see if they've gotten KDE working the way it should be :)
schwim
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