Laptop: native monitor vs. external monitor

These days I usually switch on the laptop (an Asus Zenbook) when it is already plugged in to an external monitor. This causes the external monitor to be the *only* one to display anything -- which is fine most of the time, because that's precisely what I want. The problem is that, on the very few occasions when I need to revert back to the laptop's native monitor, I simply cannot make it display anything whatsoever -- unless I reboot the machine with the external monitor unplugged.
I've tried all the xrandr variations I could think (and google) of, and nada. Also, if I try doing it on KDE's System Settings, the resolution of the external monitor will change, but the native monitor will still be blank; and if I click "Identify Outputs", the identifiers for both monitors will be shown on the external one!! (albeit on slightly different locations). Here's the output of xrandr (external mon. plugged in, native disabled):
$ xrandr
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 8192 x 8192
eDP1 connected (normal left inverted right x axis y axis)
1920x1080 60.00 + 40.00
1400x1050 59.98
1280x1024 60.02
1280x960 60.00
1024x768 60.00
800x600 60.32 56.25
640x480 59.94
VGA1 connected primary 1440x900+0+0 (normal left inverted right x axis y axis) 428mm x 255mm
1440x900 59.89*+ 74.98
1280x1024 75.02 60.02
1280x960 60.00
1152x864 75.00
1024x768 75.08 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
640x480 75.00 72.81 66.67 60.00
720x400 70.08
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
Help?

ewaller wrote:Perhaps you should share some of the xrandr incantations you have tried and post the full output of those commands.
Perhaps I should have in my original question, but the point is now moot, for after more googling, I found these two bugs that I had missed yesterday:
https://bugzilla.redhat.com/show_bug.cgi?id=844985
https://bugs.freedesktop.org/show_bug.cgi?id=48652
Short version: it's an upstream problem...

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# Copyright 2004 The X.Org Foundation
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Depth 8
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SubSection "Display"
Viewport 0 0
Depth 16
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InputDevice "cursor" "SendCoreEvents"
InputDevice "eraser" "SendCoreEvents"
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When I go to System Preferences -> Displays -> Resolution: Scaled, 1600x900 doesn't appear in the list, and none of the listed resolutions are satisfactory.
Anyone know of a way to add custom resolutions to Mountain Lion's Display preferences?

I'm having the same issue with a a 2012 MBA running Yosemite 10.10.1 (14B25). I wish I could find a solution to this problem.

Connect laptop to additon 2 external monitor

I have HP laptop with 1 HDMI & 3 USP & 2 HP monitor. How do I connect them to have total of 3 screen. Whats connection I need get for hook up. Thanks

@leonla ,
Hello and thank you for posting on the HP support forums. What you are able to do as far as display output will depend on the model and product you are dealing with.
Please post back with your full model and product number so that I can better assist you in this.
As well include the Operating System with version and any service packs.
How Do I Find My Model Number or Product Number?
Thank you again for posting. I hope to hear back from you soon.
Have a great day.
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Why does an image in Preview disappear when I move the window from my laptop screen to my external monitor?

I have an external 23" Cinema display connected to my MacBook Pro. When I open a file in Preview, moving it from either screen that it was originally on (laptop>LCD or LCD>laptop), the image disappears or "blanks". Only zooming in on the image will re-display it. Any ideas?

Still investigating this problem.

Will macbook pro output video to a 1280x1024 native monitor well?

My standard resolution monitor is bigger than the laptop display but has a different native resolution. Will the operating system still look good?

Your MBP will support the native resolution of your monitor, and the monitor will look as good as it ever has, but that setup is less than ideal for the following reasons:
Using the monitor in Mirrored mode will reduce the resolution of your Mac's built-in display, making that look lousy, and the difference in aspect ratio between the two displays will cause one or the other of them to be distorted. You really won't want to do this.
Using the monitor in Extended Desktop mode will allow each display to be set independently and to operate at its native resolution, but because the pixels in the external display are bigger than those in the MBP display, its image will appear less detailed in a side-by-side comparison. You may find that when you shift your eyes from the MBP screen to the external, your eyes involuntarily strain to discern details that are equivalent in size to the smallest details visble on the MBP screen: details that the external simply can't render with its coarse pixel grid. This could be very tiring for your eyes.
Using the monitor in closed-clamshell mode (with the built-in display closed) would allow the external to be used at its native resolution and would eliminate the mismatched levels of detail seen side-by-side in Extended Desktop mode, but of course you'd be working with fewer pixels than the built-in display provides by itself.
A much more optimal two-screen setup is one in which the external display has a higher resolution than the built-in screen, and the physical pixel sizes of the two displays are similar.

Want to install Windows 7 to my Mac with Boot Camp, but my laptop's monitor is broken. How could I start the Windows installation through an HDMI video source?

Hi everyone,
I'm trying to start a bootcamp installation of Windows 7 though an external monitor using HDMI. Is there anyway to have the installation screen show up on the external monitor? I get stuck at the beginning of the installation due to not being able to use my laptop's primary screen.
Thanks for the help!

Kapil Choubisa wrote:
when I try complete step 2, it always says "The Installer dick could not be found".
Unless you have a 2010 Mini Server model, your Mini has a built-in Optical drive (Mac mini (Mid 2010) - Technical Specifications).
Can you read the Windows Installer media when booted on OSX? Your DVD media may be corrupt.
If your Optical Drive is functional AND the Windows DVD is readable in OSX Finder, then your installer should work. You will need a USB2 for BC drivers as well.

Connecting laptop to monitor/TV and image is not full screen

I tried to connect my hp stream 11-d010ca to my monitor and my laptop via HDMI but could not get the image to appear "full screen". The picture is being duplicated fine but is only being shown in the centre of the screen and the image is not being stretching the entire screen. Basically there's the duplicated image of the laptop in the centre of the screen with large black unused space around the image on my secondary display.
Here's what is being shown on my Intel HD Control Panel. I am only getting the option to "Centre Image" and there is no option to "fit to scale" etc. The preview image in the link posted is similar to what I am experiencing with the unused black space.
http://imgur.com/AEfADmh
Thank you for your help in advance

Hi,
Please try to treat the TV as an external monitor and using Personnalize setup to fill besktop to whole screen of the TV/Monitor.
(a) Right click a blank space on desktop,
(b) Click Personalize,
(c) Click background
(d) Select fill - this will fill ... this will fill just the desktop but everting.
(e) Click Apply and Ok ...
Regards.
BH
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Laptop: native monitor vs. external monitor

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