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Drasica
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Joined: 16 Apr 2006
Posts: 175

PostPosted: Fri Jul 15, 2011 4:41 am    Post subject: [SOLVED] xrandr: screen cannot be larger than... Reply with quote

I'm trying to run this command:
Code:
xrandr --auto --output DFP1 --mode 1920x1080 --right-of DFP2


and I get this error in resposne:
Code:
 xrandr: screen cannot be larger than 1920x1920 (desired size 3840x1080)


But I specifically set my virtual screen size to be large enough:
Code:

        SubSection "Display"
        Depth 24
        Modes "1920x1080" "1920x1080" #the resolutions of your monitors                                 
        Virtual 3840 2160
        EndSubSection
EndSection


But X doesn't seem to be following the conf file, as xrandr -q shows "Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 1920 x 1920"

Here's some more relevant sections from my xorg.conf
Code:

Section "Module"
        Load  "glx"
        Load  "record"
        Load  "dbe"
        Load  "extmod"
        Load  "dri"
        Load  "dri2"
EndSection

Section "Monitor"
        Identifier   "aticonfig-Monitor[0]-0"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
EndSection

Section "Device"

        Identifier  "Card0"
        Driver      "radeon"
   BusID       "PCI:6:0:0"
EndSection

Section "Device"
   Identifier  "aticonfig-Device[0]-0"
        Driver      "fglrx"
   BusID       "PCI:6:0:0"
EndSection


Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"

Section "Device"
        Identifier  "aticonfig-Device[0]-0"
        Driver      "fglrx"
        BusID       "PCI:6:0:0"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"

        SubSection "Display"
        Depth 24
        Modes "1920x1080" "1920x1080" #the resolutions of your monitors                                 
        Virtual 3840 2160
        EndSubSection
EndSection

Section "Screen"
        Identifier "aticonfig-Screen[0]-0"
        Device     "aticonfig-Device[0]-0"
        Monitor    "aticonfig-Monitor[0]-0"
        DefaultDepth     24
        SubSection "Display"
      Viewport   0 0
                Depth     24
        EndSubSection
EndSection

Section "DRI"
   Mode         0666
EndSection


Last edited by Drasica on Fri Jul 15, 2011 4:57 am; edited 1 time in total
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Drasica
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Joined: 16 Apr 2006
Posts: 175

PostPosted: Fri Jul 15, 2011 4:56 am    Post subject: Reply with quote

Well...as it often goes, after hours of struggling, I find the answer right after seeking help :)

I needed to adjust the virtual screen in this section:

Code:

Section "Screen"
        Identifier "aticonfig-Screen[0]-0"
        Device     "aticonfig-Device[0]-0"
        Monitor    "aticonfig-Monitor[0]-0"
        DefaultDepth     24
        SubSection "Display"
      Viewport   0 0
                Depth     24
        EndSubSection
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