HDMI out not working properly in 13.1

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#1

I’m trying to use HDMI-out to show my laptop screen on both my laptop and the TV screen. I get the following issues:

  • Sometimes it’s just black on the laptop

  • If I go into Configure-Desktop->Display & Monitor, even If I drag the TV’s “box” on top of the computer box, one of the displays is always messed up. Either the TV shows only a zoomed in part of the desktop, or the laptop does this.

I’ve never been able to get them to both show correctly at the same time. What do I need to do?

openSUSE 13.1 (64bit)
Linux 3.11.6-4
KDE 4.11.3
Samsung Series 9 NP900x4C

Both the laptop and the HDMI screen are 16x9 ratios.

#2

More info:

I notice it no longer has “Size & Orientation”. This “tab” doesn’t exist! Where did that go?

Also, while both are 16x9, the laptop is 1600x900 and the TV is 1920x1080. And there’s no way to stretch the laptop in the configuration GUI.

This post: https://www.kubuntuforums.net/showthread.php?62197-Whither-Size-amp-Orientation-in-Display-and-Montior-in-system-settings seems to say that this functionality is no longer in kscreen but is in krandr. However, when I try to install krandr, I get conflicts, of which the only resolution is to uninstall kscreen, kdebase4-workspace, plasma-addons. That seems like overkill. Is there no way to set the screen sizes?

#3

Here’s what it looks like:

http://farm6.staticflickr.com/5491/11443698963_9e445e85ac_o.png

When I click the box with the green arrows, it only gives me sizes that never intersect between the two displays. So their ratio is the same but one screen is always missing some of the desktop.

#4

On 12/18/2013 08:26 PM, 6tr6tr wrote:
>
> I’m trying to use HDMI-out to show my laptop screen on both my laptop
> and the TV screen. I get the following issues:
>
> * Sometimes it’s just black on the laptop
>
> * If I go into Configure-Desktop->Display & Monitor, even If I drag the
> TV’s “box” on top of the computer box, one of the displays is always
> messed up. Either the TV shows only a zoomed in part of the desktop, or
> the laptop does this.
>

Just to clarify, when you say “drag the TV’s box on top of the laptops
box” do you mean like this? http://paste.opensuse.org/view/raw/85874742

If you mean the way you have shown in the screenshot you posted above
then of course parts of the screen will be cut off since you are only
sharing part of the screens. If you cant find a resolution for them to
share then you will have to force it in xorg.

I do find it strange that you cant find one common resolution between
the two displays though.

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#5

No, I mean like the picture I included. If I do what you show, then the laptop shows the taskbar and desktop but no windows and the TV shows only the application windows. It’s a weird amalgmation where I have to mouse off the TV screen to get to the taskbar. I’m looking for a mirroring effect.

The options I get are:

LAPTOP: 1600x900, 1024x768, 800x600, 640x480

TV: 1920x1080, 1680x1050, 1600x1200, 1440x900, 1440x480, 1280x1024…1024x768, 800x600

So there is overlap but only in the very low resolution, non-HD realm. That’s not a good solution.

Are there any other options?

#6

What are you ultimately trying to accomplish? Cloned screens or extend the desktop?

If you want to extend the desktop then you would do what alanbortu suggested. If you are trying to get a 1:1 clone that is not possible, since the displays have different native resolutions.