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Thread: Seeking reassurance about dual monitor setup.

  1. #1

    Default Seeking reassurance about dual monitor setup.

    I'm intending to connect a flat panel TV as my second monitor soon.

    If anyone has been there before, if you could cast a quick glance over the following and tell me if I've overlooked something important, I'd appreciate it.

    Here goes ...

    I'll use the nvidia server settings tool as root to change my xorg.conf, which I've backed up. I'll set things up as two separate X screens.

    Does the KDM screen appear on one or both screens? I think: Yes
    Does KDE present two desktops? I think: Yes
    I can have a different panel on each screen? I think: Yes.
    I can have a different wallpaper on each screen? I think: Yes
    Dialog boxes won't straddle screens? I think: Yes
    My mouse and keyboard focus can move between screens? I think: Yes

    I won't use Xinerama, I'll position windows by passing a -display argument or setting the DISPLAY variable.

    Finally, if I switch off the second monitor, does it mess up the first monitor's display? I *hope* : No.

  2. #2

    Default Re: Seeking reassurance about dual monitor setup.

    i have hooked up to my flat screen simply using sax2, just using a cloned multi-head and it worked fine, except for some reason i had to log out first, then log back in. my laptop screen went blank, and used the laptop, but everything appeared on the tv. sorry i can't answer many questions. also, i used a monitor cable, not s-video although it should be the same.

  3. #3

    Default Re: Seeking reassurance about dual monitor setup.

    Well, I set everything up as separate X screens ...

    With the primary display 1280x1024 on DVI and the secondary display 1680x1050 on VGA, using the nvidia-settings tool ...

    I see that the 1280x1024 display is being placed within a larger 1680x1050 window.

    Also, more worryingly, KDE on screen 1 doesn't have any window decorations, which is a showstopper.

    RTFM I suppose ... any suggestions appreciated.

  4. #4
    eimi NNTP User

    Default Re: Seeking reassurance about dual monitor setup.

    Same problem here. For a half year I've succesfully used a dual monitor setup (laptop + external 20" screen) on openSUSE 10.3, set up with nvidia-settings, as separate screens.

    First screen is 1280x800, second 1680x1050. After similiar setup in openSUSE 11, first screen has virtual resolution of 1680x1050 (but you can't scroll it) and windows in the second screen are drawn without decorations (KDE 3.5.9), making working with two monitors completely unusable.

    Did anyone find a succesfull setup of dual monitors under openSUSE 11 with nVidia card?

  5. #5

    Default Re: Seeking reassurance about dual monitor setup.

    Quote Originally Posted by eimi View Post
    windows in the second screen are drawn without decorations (KDE 3.5.9), making working with two monitors completely unusable.
    That's useful to know, because it suggests it's not something silly I've done.

    Quote Originally Posted by eimi View Post
    First screen is 1280x800, second 1680x1050. After similiar setup in openSUSE 11, first screen has virtual resolution of 1680x1050 (but you can't scroll it)
    My primary screen is working fine, although I had to widen my KDE panel to 100% - I had it centered at 80% of screen width, but it was shifted to the right.

    My primary screen is 1280x1024, and it's no longer a pane within 1680x1050, as I can confirm by moving the mouse up against the three edges that don't share an edge with the secondary screen.

    Did you remember to run nvidia-setting as root (with kdesu)? If you don't it seems to work, but it doesn't write your xorg.conf, only .nvidia-settings-rc.

  6. #6
    eimi NNTP User

    Default Re: Seeking reassurance about dual monitor setup.

    Yes, I've run nvidia-settings with kdesu. But there is another quirk: It seems that effects of two monitors at once depends on type of X-server. I've got different effects after changing in /etc/sysconfig DISPLAYMANAGER_XSERVER from Xgl to Xorg. Enough to say that this was a limited success - the first screen was in native resolution (1280x800), but on the second there was no KDE desktop or panel, only X-mouse pointer visible.

  7. #7
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    Default Re: Seeking reassurance about dual monitor setup.

    On Mon, 07 Jul 2008 14:56:04 GMT
    eimi <eimi@no-mx.forums.opensuse.org> wrote:

    >
    > Yes, I've run nvidia-settings with kdesu. But there is another quirk:
    > It seems that effects of two monitors at once depends on type of
    > X-server. I've got different effects after changing in /etc/sysconfig
    > DISPLAYMANAGER_XSERVER from Xgl to Xorg. Enough to say that this was a
    > limited success - the first screen was in native resolution
    > (1280x800), but on the second there was no KDE desktop or panel, only
    > X-mouse pointer visible.
    >
    >

    Hi
    In your /etc/X11/xorg.conf file do you have a metamode section
    detailing the modes? eg (note this is SLED), have a look here at mine,
    which I also used with 11.0 RC1 for a short time.

    http://www.muppetwifi.homeunix.net/n..._conf_sled.txt

    --
    Cheers Malcolm (Linux Counter #276890)
    SLED 10.0 SP2 x86_64 Kernel 2.6.16.60-0.23-smp
    up 18:11, 2 users, load average: 0.02, 0.07, 0.08
    GPU GeForce 8600 GTS Silent - Driver Version: 173.14.09


  8. #8

    Default Re: Seeking reassurance about dual monitor setup.

    I also have a 1280x800 laptop with a 1680x1050 Monitor I have resorted to using the 1680x1050 resolution for both as it is cloned since my Graphics card won't do one combined screen over 2 monitors. I was wondering whether there was a way to force the windows to only use the top 1280x800 pixels so that all my windows are constrained to my laptop screen but full screen videos fill the entire screen.

  9. #9

    Default Re: Seeking reassurance about dual monitor setup.

    In KDE, you can set, for each application, window size and position on the screen. This is a good workaround for the weirdness such as some of us are experiencing with dual monitors.

    It doesn't solve everything, but it helps.

  10. #10

    Default Re: Seeking reassurance about dual monitor setup.

    Today's discovery: I've turned off KDE on the second screen as explained here:

    Dual Setup. Avoid loading kde on second screen. - Installation & Configuration - KDE-Forum.org

    I'm now looking to find out why KDE on the primary screen is sometimes wrong about the display resolution.

    @sanguinus -Try putting a very thin transparent KDE panel on any edges of the screen where you wish to constrain the windows. It's an ugly, ugly hack I admit.

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