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Ubuntu 14.04 with 3 screens and a docking station - Broadwell-U Integrated Graphics

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Drożdż's picture
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Drożdż

Jun 10, 2016 - 04:02am

  • Hello,

     

    I just got a new Dell E7450 laptop with an Intel Broadwell-U Integrated Graphics card built in.

    I wanted to set up the way I did on my previous laptop - with 2 monitors plugged into DVI ports in my docking station, and as the 3rd monitor - my laptop screen.

     

    The problem is - Ubuntu only sees my laptop screen and 1 monitor. When both standalone monitors are switched on the signal gets cloned to both of them (so they all work, but two of them show the same image).

     

    A collegue of mine also has the same setting, but he has the 3rd Gen Core processor Graphics Controller in his laptop, and all 3 monitors are detected by Ubuntu.

     

    I managed to override this problem temporarily by plugging a DisplayPort -> DVI converter into the laptop directly, but that forces me to attach cables to the laptop every time i put it into the docking station, which I would like to avoid.

     

    Does anyone have any knowledge if this Broadwell-U card can support 2 separate monitors over a docking station?

     

    I noticed that lshw -c video shows "capabilities" for my friend's laptop which include "msi" and "pm", whereas mine doesn't. Could this be the problem?

     

    some outputs:

    lshw -c video

    *-display               
           description: VGA compatible controller
           product: Broadwell-U Integrated Graphics
           vendor: Intel Corporation
           physical id: 2
           bus info: pci@0000:00:02.0
           version: 09
           width: 64 bits
           clock: 33MHz
           capabilities: vga_controller bus_master cap_list rom
           configuration: driver=i915 latency=0
           resources: irq:66 memory:f6000000-f6ffffff memory:e0000000-efffffff ioport:f000(size=64)
    

    uname -a

    Linux 3.13.0-88-generic #135-Ubuntu SMP Wed Jun 8 21:10:42 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

     

     

    Jun 10, 2016 - 04:02am
  • Hi - if you run xrandr are the two monitors detected separately?
    If you're on an LTS release of ubuntu, are you able to jump to a newer kernel from one of the LTS enablement packs (point releases)?

    Jun 14, 2016 - 07:28am