> -----Original Message-----
> From: linux-desktops-bounces On Behalf Of David White
> Sent: Monday, October 17, 2016 3:57 PM
> To: linux-desktops <linux-deskt...@lists.us.dell.com>
> Subject: Re: [Linux-Desktops] Second display freezes system
> 
> Hi all:
> 
> My Dell laptop has a Intel Broadwell graphics card and an hdmi
> connection. I'm running Ubuntu 14.04 LTS. When I connect an external
> monitor to the hdmi, the system freezes and I have to do a reboot. I
> have pasted the output from certain commands below. Is there a driver or
> a ppa from Dell I can install to solved this? I need to connect the
> laptop to an external projector to do presentations.
> 
> lspci -vnn | grep VGA -A 12
> 00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U
> Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
>      Subsystem: Dell Device [1028:0654]
>      Flags: bus master, fast devsel, latency 0, IRQ 66
>      Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
>      Memory at e0000000 (64-bit, prefetchable) [size=256M]
>      I/O ports at f000 [size=64]
>      Expansion ROM at <unassigned> [disabled]
>      Capabilities: <access denied>
>      Kernel driver in use: i915
> 
> lshw -numeric -C display
> WARNING: you should run this program as super-user.
>    *-display
>         description: VGA compatible controller
>         product: Broadwell-U Integrated Graphics [8086:1616]
>         vendor: Intel Corporation [8086]
>         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)
> 
> 
> inxi -M
> Machine:   System: Dell (portable) product: Inspiron 3543 version: A03
>             Mobo: Dell model: 0MGXC6 version: A00 Bios: Dell version:
> A03 date: 02/04/2015
> 
> glxinfo | grep OpenGL
> OpenGL vendor string: Intel Open Source Technology Center
> OpenGL renderer string: Mesa DRI Intel(R) Broadwell
> OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.1.3
> OpenGL core profile shading language version string: 3.30
> OpenGL core profile context flags: (none)
> OpenGL core profile profile mask: core profile
> OpenGL core profile extensions:
> OpenGL version string: 3.0 Mesa 10.1.3
> OpenGL shading language version string: 1.30
> OpenGL context flags: (none)
> OpenGL extensions:
> 
> inxi -Gxx
> Graphics:  Card: Intel Broadwell-U Integrated Graphics bus-ID: 00:02.0
> chip-ID: 8086:1616
>             X.Org: 1.15.1 drivers: intel (unloaded: fbdev,vesa)
> Resolution: 1366x768@60.0hz
>             GLX Renderer: Mesa DRI Intel Broadwell GLX Version: 3.0 Mesa
> 10.1.3 Direct Rendering: Yes
> 
> 

That machine was certified with Ubuntu 12.04.  it's possible that there was
some regression that happened in the Ubuntu 14.04 release, or possibly
the hardware enablement kernel/X stack that you are currently using.

Since it worked properly on Ubuntu 12.04, two options I would recommend:
1) Switch back to Ubuntu 12.04 OEM image
2) Try Ubuntu 16.04 from a live USB stick and see if this function works 
properly for you.  If it does, then upgrade to the Ubuntu 16.04 HWE pack
on Ubuntu 14.04 or reinstall Ubuntu 16.04.

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