External WUXGA Samsung monitor is forcing my laptop to VGA resolution.

[Robert P. J. Day]

Quoting "Wolfgang S. Rupprecht" <wolfgang.rupprecht+gnus200809 at gmail.com>:

>
> "Robert P. J. Day" <rpjday at crashcourse.ca> writes:
>> How does connecting the monitor somehow force the laptop into
>> 640x480 mode?
>
> I think X is trying to find some commonality between the two monitors
> so that it can display the exact same image on both.  As you noticed,
> that idea appears to be rather flawed.
>
> I've been toying with doing the same under F9.  So far the best I
> could do was to use Xrandr to configure each screen to its native size
> and join one screen left/right of the other.  That's not really usable
> either since the top and bottom window-manage toolbars only extend to
> the left/right edge of the laptop screen.  Ideally, I'd like the
> laptop screen to simply not display anything.  I'm not sure how to do
> that yet, but hopefully the Xrandr hint will get you started.

After upgrading the laptop to F9, and hooking video, not to the monitor,
but to a piece of video processing equipment that is supposed to drive
the monitor, that video equipment is now forcing my laptop back to
1152x864 every time.  As soon as I disconnect the laptop, I can get my
native 1920x1200 back.  But not when I'm connected.

Grrrrrrr.  I'll look at Xrandr.  Thanks.

rday