On Mon, 1 Jul 2002, Dean S. Messing wrote:
>
>
> Hello Mark, all.
>
> I've just gotten twinview set up on my GeForce 4 Ti4600 board (VisionTek).
> I've got a 1600x1200 CRT to the left and a 1200x1024 FP to the right.
> I've got two metamodes defined (for now):
>
> Section "Screen"
> Identifier "screen1"
> Device "NVIDIA GeForce4"
> Monitor "Panasonic|Panasonic S21"
>
> Option "TwinView" "On"
> Option "SecondMonitorHorizSync" "31-68"
> Option "SecondMonitorVertRefresh" "60-76"
> Option "MetaModes" "1600x1200, 1280x1024 @1280x1200; 1600x1200,
>null"
> Option "TwinViewOrientation" "rightof"
>
> <snip>
>
> EndSection
>
> Questions:
>
> 1: Do I need to do anything special to enable the xinerama extension
> mentioned in the Nvidia Readme? I ask because KDE seems
> to like to put windows up right across the boundary between the
> two monitors and the Readme indicates that the xinerama extension
> should prevent this. What am I missing.
The Xinerama extension does not prevent this. The Xinerama
extension gives the window manager a mechanism to prevent this.
Window managers must specifically support this. Some do, some don't.
I don't know about KDE. Some window managers try to do this and
are broken and have behavior worse than if they did nothing at all
so we have an option to disable advertising of the Xinerama extension.
>
> 2: When I change modes to the 2nd mode KDE keeps the virtual desktop
> size of the first metamode. The FP shuts off alright but
> the CRT has a 2800x1200 virtual desktop. How can I make the
> virtual desktop snap to the CRT resolution when in the second mode?
The root window can never change size throughout the X session,
Even with a single head, there is no mechanism in the X-window system
to resize the desktop. XFree86 hotkeys for mode switching merely
change the size of the viewport, not the root window.
There is that panning domain stuff in TwinView that might at
least let you prevent the one head from panning outside of its
square of the screen.
>
> 3: This XF86Config file I've cobbled together comes from
> an older single-head one. So following the stuff above there's
> all the "Display" subsections I had before. Is this now cruft that
> I can remove? What about DefaultColorDepth?
>
I thought DefaultColorDepth was a XFree86 3.x keyword? There
is a DefaultDepth in 4.x.
Mark.
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