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    #1

    System does not see connected monitors

    Hello,
    I am using my laptop with an external monitor (this is an old Dell Laptop with an intel video chip).
    In previous kubuntu versions, the two displays were clearly separated as LVDS0 and VGA0.
    Now, in the system settings/Display, I only see one monitor which says "Default". The ouput of xrandr gives me:
    xrandr: Failed to get size of gamma for output default
    Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768
    default connected 1024x768+0+0 0mm x 0mm
    1024x768 0.0*

    The LCD monitor of the Laptop works perfectly, but the external monitor is used at the same resolution, which is much lower than the native screen resolution, and I have a tiny picture on my monitor.

    I don't have a xorg.conf file in /etc/X11 directory.

    How can I configure my external monitor?

    Thanks for your help...
    Tags: None
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    #2
    Re: Set display properties (external monitor)

    You may find help at the address:
    http://kubuntuforums.net/forums/inde...opic=3114692.0

    Hope this is of use.
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      #3
      Re: Set display properties (external monitor)

      Hello,
      Thanks for your reply. Unfortunately, the linked post does not help me. With previous versions, I already had the issues reported in the linked post, and I solved them accordingly.

      But since I installed Kubuntu 10.10, it is as if I have no displays connected (thee output of the xrandr command in my first post): No VGA1, no LVDS1, so impossible to use commands such as
      xrandr --output VGA1 --mode 1280x1024 --rate 60
      because I cannot specify a display.

      Does anyone have an idea why I don't see the connected displays when I issue a xrandr command, and how to fix this?

      Thanks
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        #4
        Re: System does not see connected monitors

        http://kubuntuforums.net/forums/inde...opic=3111093.0

        Please Read Me
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          #5
          Re: System does not see connected monitors

          So here is the needed info:
          I am running Kubuntu 10.10 (KDE4.5.1 and Grub 0.97-29ubuntu60)
          Concerning my PC, it is an old Dell Inspiron 510m laptop. The GPU is an Intel Corporation 82852/855GM Integrated Graphics Device.
          CPU: 32 bit intel.

          Voilà... I hope this info can help pinpoint the issue.

          Thanks!

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            #6
            Re: System does not see connected monitors

            But you haven't told us about the external display you are connecting to, and it's the one with the problem. What manufacture? What model?
            Windows no longer obstructs my view.
            Using Kubuntu Linux since March 23, 2007.
            "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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              #7
              Re: System does not see connected monitors

              Intel graphics chips are very problematic. Make sure you have the latest drivers and xorg. Also, read your /var/log/Xorg.0.log for messages.

              I had much better luck with my intel chip on 9.04 than with 10.10

              Please Read Me
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                #8
                Re: System does not see connected monitors

                Thanks for your replies

                @Snowhog: I have tried two different monitors: a Dell LCD monitor (nothing written on it), which has a native resolution higher than the 1024x768 from my laptop display (hence the problems described in my first post), and a Samsung SyncMaster520TFT. This monitor has also a native resolution of 1024x768, so I can use it, but the output of the xrandr command does not change, i.e. whatever the monitor, the system does not recognize it as it is not listed. It just happens to work when the external monitor has the same resolution than the Laptop LCD. You say that the issue is the external monitor, but with previous Kubuntu version <=10.04, even when I had no external monitor connected, issuing a xrandr command resulted in an answer like LVDS1 connected 1024x768 etc. Now I don't even have that line.

                @oshunluvr: I have installed the package xserver-xorg-video-intel, but I don't know how I can be sure which driver is effectively used. I have identified the following messages in the Xorg log that seem problematic (tell me if that would be useful to post the complete file). It seems to me that X is looking for information about screens and layout in the /usr/share/X11/xorg.conf.d, but can't find any.

                [ 21.840] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
                [ 21.840] (==) No Layout section. Using the first Screen section.
                [ 21.840] (==) No screen section available. Using defaults.
                [ 21.841] (**) |-->Screen "Default Screen Section" (0)
                [ 21.841] (**) | |-->Monitor "<default monitor>"
                [ 21.841] (==) No monitor specified for screen "Default Screen Section".
                Using a default monitor configuration.
                (...)

                [ 21.877] (EE) VESA: Kernel modesetting driver in use, refusing to load
                [ 21.877] (WW) Falling back to old probe method for vesa
                [ 21.877] (II) Loading sub module "fbdevhw"
                [ 21.877] (II) LoadModule: "fbdevhw"
                [ 21.878] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
                [ 21.878] (II) Module fbdevhw: vendor="X.Org Foundation"
                [ 21.878] compiled for 1.9.0, module version = 0.0.2
                [ 21.878] ABI class: X.Org Video Driver, version 8.0
                [ 21.878] (**) FBDEV(0): claimed PCI slot 0@0:2:0
                [ 21.878] (II) FBDEV(0): using default device
                [ 21.878] (II) FBDEV(0): Creating default Display subsection in Screen section
                "Default Screen Section" for depth/fbbpp 24/32
                [ 21.878] (==) FBDEV(0): Depth 24, (==) framebuffer bpp 32
                [ 21.878] (==) FBDEV(0): RGB weight 888
                [ 21.878] (==) FBDEV(0): Default visual is TrueColor
                [ 21.878] (==) FBDEV(0): Using gamma correction (1.0, 1.0, 1.0)
                [ 21.878] (II) FBDEV(0): hardware: inteldrmfb (video memory: 3072kB)
                [ 21.878] (II) FBDEV(0): checking modes against framebuffer device...
                [ 21.878] (II) FBDEV(0): checking modes against monitor...
                [ 21.878] (--) FBDEV(0): Virtual size is 1024x768 (pitch 1024)

                (...)

                [ 22.327] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
                there are 238 lines with this message

                Thanks!
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                  #9
                  Re: System does not see connected monitors

                  Are you connecting the second monitor with a dvi cable or vga
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                    #10
                    Re: System does not see connected monitors

                    This
                    [ 21.877] (EE) VESA: Kernel modesetting driver in use, refusing to load
                    tells us kernel mode setting has failed, and this
                    [ 22.327] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
                    there are 238 lines with this message
                    makes it appear that you're using the frame buffer driver rather than the intel one. This might explain how come your LVDS connection isn't showing up.

                    Look and see if you have a file /etc/X11/xorg.conf. If you do, attach a copy of it to your next post.

                    Here's some other resources:

                    https://launchpad.net/~glasen/+archive/intel-driver
                    https://launchpad.net/~intel-gfx-testing/+archive/ppa

                    https://wiki.ubuntu.com/X/KernelModeSetting

                    The first two are alternate drivers for your card and the last one is a how-to for KMS setup.

                    Sorry I can't be more helpful yet, but this is a difficult area and lots of the Intel chipsets respond differently to changes.

                    It's possible to "break" your video at some point, so you might want to read up on how to recover your GUI from a text console.

                    I would test one driver at a time to see if they help, but don't try to install them both at once. The glasen driver worked best for me but I have a 945gm chip.

                    Also, I would suggest searching the web using the exact model number ( 855gm) of your video chip and add "linux" and/or "xorg" to the search. This might reveal some posts on other forums that will be helpful.

                    Please Read Me
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                      #11
                      Re: System does not see connected monitors

                      Here's a potentially helpful site:

                      http://www.thinkwiki.org/wiki/Intel_Extreme_Graphics_2

                      Please Read Me
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                        #12
                        Re: System does not see connected monitors

                        Thanks for your help.

                        I don't have a xorg.conf file in /etc/X11, and I am using a VGA cable to connect my monitor to the laptop.

                        Anyway, I'll try to play around with the different drivers and KMS settings, and I will report on progress (or the absence thereof)...
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                          #13
                          Re: System does not see connected monitors

                          I have the same problem. Is there still no solution?
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