getting aux display on laptop to be the only display

Aryeh M. Friedman aryeh.friedman at
Tue Jun 9 03:09:26 UTC 2009

Tim Judd wrote:
> Laptop VGA cards are only two types: independently driven, or
> mirrored.  The former is what allows the internal and external to
> display different things simultaneously.  The latter is a 1:1 mirror
> image on one and other.  All laptops I've seen when the external VGA
> is enabled are mirrored.  Via VGA driver functions, you can make them
> independent.
> My guess for what you need is xrandr, to which I'm not very well
> versed.  It seems to be "the answer" when it comes to video output
> layout, size, orientation...  swiss army knife.

That did the trick for anyone else with the same setup put this in any 
of your personal rc's like .xsession:

xrander --output LCVDS --off --output VGA --auto

> I'm welcome to corrections and learning myself, but I would shoot for
> VGA driver and/or xrandr tweaking first.
> On 6/8/09, Aryeh M. Friedman <aryeh.friedman at> wrote:
>> I have following hardware on my laptop:
>>  > dmesg|grep vga
>> vgapci0: <VGA-compatible display> port 0x6110-0x6117 mem
>> 0x90000000-0x903fffff,0x80000000-0x8fffffff irq 16 at device 2.0 on pci0
>> agp0: <Intel GM45 SVGA controller> on vgapci0
>> vgapci1: <VGA-compatible display> mem 0x94500000-0x945fffff at device
>> 2.1 on pci0
>> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
>> drm0: <Mobile Intel\M-B\M-. GM45 Express Chipset> on vgapci0
>> vgapci0: child drm0 requested pci_enable_busmaster
>> and I have an extrtnal 21" widescreen (vga) that when I hook it up the
>> default x11.config  has it  at  1024x768 on *BOTH*  monitors.... How do
>> I make it so X only considers the external (if attached) monitor?
>> _______________________________________________
>> freebsd-questions at mailing list
>> To unsubscribe, send any mail to "freebsd-questions-unsubscribe at"

More information about the freebsd-questions mailing list