Bristol Digest, Vol 551, Issue 6

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Today's Topics:

1. Multiple displays for my laptop (Amias Channer)
2. Re: Multiple displays for my laptop (Shane McEwan)
3. Re: Multiple displays for my laptop
(bblug@gascoigne19.freeserve.co.uk)


----------------------------------------------------------------------

Message: 1
Date: Sat, 24 May 2014 20:48:57 +0100
From: Amias Channer <me@amias.net>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: [bristol] Multiple displays for my laptop
Message-ID: <1400960937.10375.13.camel@rome>
Content-Type: text/plain; charset="UTF-8"

Roit moi Luggers,

its been a while , i hope you are all well :)

I have a pair of LG 24 inch LCD IPS panels (VGA/DVI/HDMI) that i want to
use with my dell inspiron 7737 which has usb and hdmi. I'm running
ubuntu 14.04.

As i understand it my options are a usb 3.0 docking station thing
with dual hdmi or some kind of cable with a lump that combines
two hdmi screens to display one hdmi output.

Has anyone on this list tried this sort of thing before ?
I welcome your tails of success and woe.

I've seen quite a lot of tales of woe from linux users who tried
displaylink solutions but been bitten by a lack of usb 3 support.

It would be cool if the solution worked with my wifes macbook pro as
well but not essential.

Toodle-pip
Amias








------------------------------

Message: 2
Date: Sun, 25 May 2014 10:27:32 +0100
From: Shane McEwan <shane@mcewan.id.au>
To: bristol@mailman.lug.org.uk
Subject: Re: [bristol] Multiple displays for my laptop
Message-ID: <5381B784.7030007@mcewan.id.au>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

On 24/05/14 20:48, Amias Channer wrote:
> I have a pair of LG 24 inch LCD IPS panels (VGA/DVI/HDMI) that i want to
> use with my dell inspiron 7737 which has usb and hdmi. I'm running
> ubuntu 14.04.
>
> As i understand it my options are a usb 3.0 docking station thing
> with dual hdmi or some kind of cable with a lump that combines
> two hdmi screens to display one hdmi output.

In my, limited, experience you'll probably have problems running two
monitors at full resolution and refresh rate over a single USB
connection. There just isn't enough bandwidth. My tests were pre-USB3,
however, so if you can get USB3 then YMMV. Anyway, the detailed specs
for the USB docking station should state what resolution and refresh
rates the video output can drive so make sure you check that. Also,
because you've already got one HDMI port on your laptop, in theory you
only need to drive one monitor from USB. That should be possible. Linux
drivers could also be an issue. I would recommend buying a device from a
reputable source that allows returns if it doesn't work.

I've never come across a dual-HDMI cable. It sounds dodgy.

Shane.



------------------------------

Message: 3
Date: Sun, 25 May 2014 10:51:13 +0100
From: <bblug@gascoigne19.freeserve.co.uk>
To: "'Bristol and Bath Linux User Group'" <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Multiple displays for my laptop
Message-ID:
<01d601cf77fe$dd9b8870$98d29950$@gascoigne19.freeserve.co.uk>
Content-Type: text/plain; charset="us-ascii"

-----Original Message-----
From: bristol-bounces@mailman.lug.org.uk
[mailto:bristol-bounces@mailman.lug.org.uk] On Behalf Of Shane McEwan
Sent: 25 May 2014 10:28
To: bristol@mailman.lug.org.uk
Subject: Re: [bristol] Multiple displays for my laptop

On 24/05/14 20:48, Amias Channer wrote:
> I have a pair of LG 24 inch LCD IPS panels (VGA/DVI/HDMI) that i want
> to use with my dell inspiron 7737 which has usb and hdmi. I'm running
> ubuntu 14.04.
>
> As i understand it my options are a usb 3.0 docking station thing with
> dual hdmi or some kind of cable with a lump that combines two hdmi
> screens to display one hdmi output.

In my, limited, experience you'll probably have problems running two
monitors at full resolution and refresh rate over a single USB connection.
There just isn't enough bandwidth. My tests were pre-USB3, however, so if
you can get USB3 then YMMV. Anyway, the detailed specs for the USB docking
station should state what resolution and refresh rates the video output can
drive so make sure you check that. Also, because you've already got one HDMI
port on your laptop, in theory you only need to drive one monitor from USB.
That should be possible. Linux drivers could also be an issue. I would
recommend buying a device from a reputable source that allows returns if it
doesn't work.

I've never come across a dual-HDMI cable. It sounds dodgy.

Shane.

_______________________________________________


I've seen people have very good luck with Matrox devices which emulate one
VERY wide screen, and in fact split that into two outputs. Think the one I
saw was used with two projectors, so emulated 8x3 to the PC, but I've seen
similar for 16x9 duals (32x9)...

They plug into your display output and tell the computer they're one display
device, but then separate it, so you just need to make sure whatever you're
displaying will then work with a single (or half) a screen.

Does the Inspiron not work with a standard Dell port replicator? Those have
twin display outputs usually...

John






------------------------------

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End of Bristol Digest, Vol 551, Issue 6
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