Virtual desktop - smaller than display

Martin Langhoff martin.langhoff at
Fri Jul 9 11:04:08 PDT 2010

On Thu, Jul 8, 2010 at 4:37 PM, Alex Deucher <alexdeucher at> wrote:
> On Thu, Jul 8, 2010 at 3:59 PM, Martin Langhoff
> <martin.langhoff at> wrote:
>> On Thu, Jul 8, 2010 at 3:44 PM, Alex Deucher <alexdeucher at> wrote:
>>> if your hw supports a scaler, just set the smaller mode and have it
>>> scale up to the larger screen mode.  If not, you'll have to mess with
>>> the h/v border widths in the modeline to generate a center mode.
>> Hmmm. Interesting. Does it work on LCDs? How do I calculate that?
>> Current modeline is (from Xorg.0.log)
>> 1200x900 x50.6 57.27 1200 1208 1216 1240 900 905 908 912 -hsync -vsync
> Something like:

Not working at all for me unfortunately. Maybe I am flunking the
modeline math, but I think that this specific driver (openchrome) has
special hardcoded magic for our display.

That modeline is what Xorg reports when it autodetects the modeline --
using the exact same modeline via explicit declaration kills the
display. So this driver ain't a friend of modeline tweaking.

Do we have a VirtualAndIMeanIt stanza?

 martin.langhoff at
 martin at -- School Server Architect
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