Extending desktop to 3 monitors - trouble with resolution

Hello Everyone,
Trying to extend the desktop on my HP Elitebook 850G1, using 2 HP Compaq LA2405x monitors. My original LA2405x can go up to 1920x1200 (connected through DisplayPort), yet the new one I just added wont go beyond 1920x1080 (connected through VGI)

At first I assumed VGA must be limiting the resolution but a quick search revealed that VGA can go much higher, so that doesn't seem to be the issue. I tried updating drivers and playing around with the settings, but I cant seem to figure it out for the life of me.

Any ideas?
LVL 6
Sir LearnalotAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Gary CaseRetiredCommented:
I suspect the graphics adapter simply doesn't support higher resolution on the VGA port.

Note that the manual has this note regarding the two:  "... The DisplayPort delivers higher performance than the VGA external monitor port ..."
0
Gary CaseRetiredCommented:
By the way, it's not at all unusual for a graphics adapter to have a lower max resolution on the analog output than on the digital output(s).
0
Sir LearnalotAuthor Commented:
How do I check what the highest resolution output available on my port is - I thought VGA was a standard that supported up to a certain resolution and as long as you are using VGA you would have access to within these limits (the only limiter should be the monitor).
0
Cloud Class® Course: Amazon Web Services - Basic

Are you thinking about creating an Amazon Web Services account for your business? Not sure where to start? In this course you’ll get an overview of the history of AWS and take a tour of their user interface.

Gary CaseRetiredCommented:
"... How do I check what the highest resolution output available on my port is "  ==>  The video driver won't allow you to set the "slider" to a resolution higher than your specific graphics adapter supports in analog mode or than your monitor can support, whichever is lower.   To confirm which is the limiting factor you need to look at the detailed specifications for both devices.

"...  I thought VGA was a standard that supported up to a certain resolution and as long as you are using VGA you would have access to within these limits (the only limiter should be the monitor)."  ==>  VGA actually refers to the 640 x 480 resolution defined by IBM when they invested the "video graphics array" (VGA) many years ago.    It has come to also mean the 15-pin connector that was standard for that output ... and of course virtually all graphics adapters support resolutions well above 640 x 480 using that same connector.    But what resolution you can actually get depends on the analog output limits of the specific graphics adapter you're using, and the capabilities of the monitor you're using when in analog mode.

In your specific case, it's clear that the graphics adapter is limited to 1080 lines in analog output mode, thus your maximum available resolution of 1920 x 1080.    The manual is fairly clear about this:  "... The DisplayPort delivers higher performance than the VGA external monitor port ..."

If you want your two displays to have matching resolution, you simply need to set the display connected via DisplayPort to the same 1920 x 1080 that the analog output is set to.
0
MereteCommented:
Display adapters come handy for this, mostly used for laptop but could be used for a dekstop?
Garycase do you know if this could work on a desktop?

Just as an example on Amazon
Kensington Universal Multi-Display Adapter (Black)
http://www.amazon.com/Kensington-Universal-Multi-Display-Adapter-Black/dp/B002F9NSMQ
Read the feedback from folks who  have posted  their experiences with it.
0
Gary CaseRetiredCommented:
Yes, the USB adapters work fine on a desktop.   But the adapter you noted is unlikely to provide the 1920 x 1200 resolution the author is looking for ... I don't think it can go beyond the 1152 lines noted in the specs for displays more than 1600 pixels wide [It can apparently do 1600 x 1200 in 4:3 aspect ratio; but nothing above 1152 lines in 16:9]
0
MereteCommented:
Thanks appreciate it.
Actually now that I think about it, Sir Learnalot wants to extend the desktop,
One idea is the displaylink Hub
DisplayLink USB graphics technology allows you to connect almost any kind of display via a standard USB 2.0 or USB 3.0 cable.
DisplayLink USB graphics technology allows for high resolution, full 32-bit color graphics, at resolutions up to 2560x1600 (depending on chip used). Here's how it works:
http://www.displaylink.com/technology/technology_overview.php
video on the display link hub?
http://www.displaylink.com/for-business/video_tutorials.php
https://www.youtube.com/watch?v=1LDW9IpGgNU
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Displays / Monitors

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.