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Thread: Automatic recognition of external monitor at startup

  1. #1

    Default Automatic recognition of external monitor at startup

    Hello alle,

    I work on my laptop and use it both at the office and at home. Both of my desks have external monitors. Sometimes, however, I work in the train or in other places and then I use my laptop's built in monitor. Mainly I work with external monitors though.

    On my current system (OpenSUSE 11.3 64-bit KDE) I have to set my monitor resolution every time I startup my system. I know that in Ubuntu the system's able to recognize e.g. when another monitor is connected and the laptop is closed, so that the screen is shown on the external monitor with its optimal resolution. Is there a way to do that in OpenSUSE?
    I thought about trying to make a startup script that always sets up the resolution of my external monitors, but that wouldn't be too great of an idea because I don't always work with them and their resolution is higher than my laptop's, meaning that (I assume) I'd have problems if I started up without being connected to a monitor.

    Thanks!
    Daniel

  2. #2
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    Default Re : Automatic recognition of external monitor at startup

    Hi,

    What is you graphic card? If you have a nvidia card, I think it is possible to set this through the nvidia config applet, but I am not sure.

  3. #3

    Default Re: Automatic recognition of external monitor at startup

    I've got an Intel laptop, I think that means I've got no graphic card and that everything runs on the processor.

    Hardware info has under "Display --> Model": Intel Arrandale Integrated Graphics Controller"

  4. #4

    Default Re: Automatic recognition of external monitor at startup

    Does anybody else have any ideas? I'd try the nvidia applet, but I don't have an nvidia card so it doesn't make much sense.

  5. #5
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    Default Re: Automatic recognition of external monitor at startup

    I'm slightly puzzled by your question because, at least since 11.3, whenever I attach to a projector, KDE4 automatically adjusts the screen resolution - normally stretching the screen on my laptop - so that the picture fills both the projector screen and my laptop screen, albeit the latter with some slight distortion. The only problem I have when I disconnect is that the panel has been shortened to match the projector and, unlike everything else on the desktop, does not resume its normal size. So I have to adjust it manually. I would have thought this would apply to any external monitor. (I also have Intel graphics).

  6. #6

    Default Re: Automatic recognition of external monitor at startup

    Hmm... Mine doesn't do that. My resolution is set to 1024x768 on both screens, which is a huge distortion on both of them. Which would be an alright resolution for most projectors, but not for my widescreen monitors. The screen is only automatically recognized and used if I already have the VGA cable connected at boot time.
    Oh - that's probably also relevant, I'm using an analog video output. Don't have a digital or HDMI port.

    Another problem is that both of my monitors have different resolutions - at home and at work - so that the appropriate resolution really needs to be set manually each time - I can't just script it to start at the correct resolution every time, because depending on whether I'm using my laptop without a monitor, using the work monitor or the home monitor, it's always different.

    Maybe it's got to do with KDE? Ubuntu recognizes the external monitors and sets the right resolution automatically. It also recognizes that I only want to use the external monitor if I leave my laptop closed.

  7. #7
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    Default Re : Re: Automatic recognition of external monitor at startup

    Hi,

    I am using KDE too, maybe it is related. I'll test with my other laptop, it has GNOME...

    Anyway, I have the same symptoms as erget with HDMI connection. It doesn't adjust the resolution when I ouptut it on my TV for example.

    I stumble on this link, maybe it could help. I didn't try it and I didn't read it that much, so bare with me, it is a suggestion : Linux Tipps & More: Automatically switch to connected External Display on Boot with XRandR I don't know if this tiop will adjust resolution though....

  8. #8
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    Default Re: Re : Re: Automatic recognition of external monitor at startup

    Flying a kite here - I have never attempted to define the second monitor resolution because I connect to different projectors at different locations. Does defining the second monitor resolution shut out the automatic configuration that I am experiencing?

  9. #9
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    Default Re : Re: Re : Re: Automatic recognition of external monitor at startup

    Well, I am not sure to undersyand what you mean here???

  10. #10
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    Default Re: Re : Re: Re : Re: Automatic recognition of external monitor at startup

    Erget said he had to set the resolution every time; I was wondering whether, even though that isn't picked up properly, setting a resolution results in the values being stored somewhere which then inhibits the automatic adjustment which I am experiencing. He also said that he got the same resolution on both screens resulting in distortion on both. I don't; I get distortion only on the widescreen because the narrower projector screen is stretched to fill the widescreen but, after the projector is disconnected, the screen reverts to normal resolution at the next login.

    So I was wondering whether I am having a different experience because I have never tried to set any values at any time but simply accepted what KWin (presumably) was offering.

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