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Multiple external monitors

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Peter Walsh's picture
Starter
Peter Walsh

Apr 23, 2014 - 02:22pm

  • I've tried posting two help questions to no avail. I always get hit w/ a Your submission has triggered the spam filter and will not be accepted. If you feel this is in error, please report that you are blocked. I've clicked that link and waited for over a week w/ no response. How in the world can you post to these forums?

    Apr 23, 2014 - 02:22pm
  • Here is part of what I wanted to post:

     

    Trying this again, first post was blocked by spam filter.

     

    I have a dell e5540 running xubuntu 13.10. When I dock in my docking station that has dual DVI output, I can't individually address the external monitors.

     

    Right now I have my machine docked. eDP1 is my laptop's LCD panel. DP1 in an ASUS 23" monitor. I have another ASUS 23" monitor connected as well to what should be DP2, but it is just mirroring what is on DP1.

     

    I want the LCD panel turned off, and both external monitors turned on each displaying different content. With nvidia stuff this was easy to do w/ either xrandr or the built in tools. I'm at a loss here on how to get the intel drivers to realize I've got two external monitors.

     

     

    Apr 23, 2014 - 02:24pm
  • It seems it doesn't like the output of xrandr.

     

    Let me try to trim out some of the output about what modes are supported.

     

    xrandr
    Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
    eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm

    DP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 521mm x 293mm
     
    HDMI1 disconnected (normal left inverted right x axis y axis)
    DP2 disconnected (normal left inverted right x axis y axis)
    HDMI2 disconnected (normal left inverted right x axis y axis)
    VIRTUAL1 disconnected (normal left inverted right x axis y axis)

    Apr 23, 2014 - 02:28pm
  • This was the original subject line:dell lattitude e5540 / xubuntu 13.10 dual monitor support w/ dock

    Apr 23, 2014 - 02:31pm
  • Hi - what does the output look like when you're not docked? I don't see an LVDS entry there, which I would expect for the built-in LCD. If you could isolate the xrandr output for each monitor, that might give us a clue.

    Also, this isn't really an installer realted question, so I'm going to see about getting it moved to the advanced forum (but don't worry about that, just keep talking here and at some point the thread should magically move)

    Apr 28, 2014 - 09:11am
  • eDP1 is the laptop's LCD panel.

     

    I'll post the xrandr output once I get back to the machine.

     

    Thanks.

    Apr 28, 2014 - 12:03pm
  • Latitude-E5540:~$ xrandr
    Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
    eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
    <snip>

    had to remove modes in order to post.

    It flags the post as spam if I keep them in.

    </snip>

    DP1 disconnected (normal left inverted right x axis y axis)
    HDMI1 disconnected (normal left inverted right x axis y axis)
    DP2 disconnected (normal left inverted right x axis y axis)
    HDMI2 disconnected (normal left inverted right x axis y axis)
    VIRTUAL1 disconnected (normal left inverted right x axis y axis)

    Apr 28, 2014 - 12:13pm
  • Hm. Well, nothing springs to mind immediately - I'm going to have to check with some colleagues.

    With regards to the spam blocking - I feel your pain. It'sprevented me from replying to people
    on a number of occasions.

    May 08, 2014 - 08:06am
  • Tan's picture
    Tan

    I have the same exact issue with the same hardware (Dell Latitude E5540 + docking station) on Ubuntu 12.04 and 14.04.

    No matter what combination output I use (VGA, DVI, HDMI/Display port) I use, any two external monitors will mirror each other.

     

    May 14, 2014 - 11:41am
  • Bump...

     

    Wondering if anyone has any more info on this. It'd be nice to be able to use both my big monitors.

    May 19, 2014 - 10:45am
  • I've confirmed w/ a friend here at work that has the same hardware, that what I'm wanting to do is possible running windows, so I know it isn't a hardware issue, it's got to be a driver issue.

     

    Does anyone have any suggestions for troubleshooting this?

     

    I'm now having to look at trying external usb w video adapters.

    May 21, 2014 - 12:49pm
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