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I recently upgraded my system from Ubuntu 15.10 to 16.04LTS. But after the upgrade, my extended display is not being detected. I am connecting the second display through an HDMI port. I even tried System settings > Displays >detect display.

Does anyone know how to fix this?

kelvinelove
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Denny John
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1 Answers1

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The issue was with the nvidia graphics driver. This can be fixed by following the steps below:

  1. Run 

    sudo apt-get purge ^nvidia

  2. Run 

    sudo add-apt-repository ppa:graphics-drivers/ppa

  3. Run 

    sudo apt-get update

  4. Run 

    sudo apt-get install nvidia-387

    For this, check what the latest version is... in my case as of January 2018 it's nvidia-387.

The graphics versions are here on Launchpad.

Reboot and your graphics issue should be fixed.

Zanna
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Denny John
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    Could you post the lspci output? I solved the problem by upgrading the kernel to 4.5.2. but I use a dual graphics system with AMDGPU. Second display on HDMI. – Mookey May 03 '16 at 06:39
  • @Mookey 00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b) 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b) 00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b) 00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04) 00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04) 00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 1 (rev e4) – Denny John May 03 '16 at 06:41
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    Cool. Hacking this into my 16.04 on a dell e6420 destroyed my lightdm resolution and I'm not able to login. – ferdy Jun 17 '16 at 19:29
  • Does not work for me. I have a Alienware laptop and it often does not detect external monitor using hdmi out. – Sudipta Basak Jun 21 '16 at 04:02
  • @ferdy, same here. How did you fix this? – eskalera Oct 07 '16 at 07:57
  • @eskalera i think i removed the configuration .gconf or so in my home folder and re-adjusted everything again. – ferdy Oct 07 '16 at 20:12
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    E: Unable to locate package nvidia-364 – mjp Jan 27 '17 at 20:02
  • @mjp I re-installed nvidia-common, thats all the first command was removing on my system. If your system is stuck re-install it and reboot. I did re-install it before rebooting and the dual screen is working. This answer is not a good one but honestly I am not sure sure if just re-installing the nvidia-common was the solution – Bizmate Feb 11 '17 at 12:54
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    Instead of nvidia using Nouveau display driver from xserver-video-nouveau solved problem for me – Yogesh Aug 08 '17 at 16:19
  • I have ATI vega after run this command it worked sudo add-apt-repository ppa:graphics-drivers/ppa – 3bdoelnaggar Jun 06 '19 at 02:09