[PD] pictures from a digital camera

IOhannes m zmoelnig zmoelnig at iem.at
Mon Jan 15 17:13:36 CET 2007


raphy.ilias at free.fr wrote:
> Hello !

> Another question : I'm now working with the pure:dyne (I think you know it). I'd
> like to display the Gem window in fullscreen on an external
> monitor/videoprojector. I manage to get an « extended desktop » (with Xinerama)
> but not to display the gemwin on the external monitor : with [fullscreen 1( it
> is always displayed on my laptop, and with [fullscreen 0( the video of the Gem
> window is no more rendered when i pass it on the external screen. I tried lots
> of settings in my xorg.conf, but it never worked more than once (if it works
> one time, it doesn't anymore when i restart X). I think Gem refers to the
> Screen 0 to choose where it is displayed, but even if i define the external
> screen as the Screen 0,  it doesn't work, the « display screen » or the «
> rendering buffer » remains on my laptop. My graphic card is a Intel 855 GME, so
> i'm using i810 as driver. Has anyone got the same problem ?

this should be a problem with your gfx card (though i have no experience
with your specific model; probably frank can help you here)

everything displayed by Gem is done in openGL. a lot of cheaper gfx
cards for laptops will only provide openGL acceleration on the first
head. trying to render to the 2nd screen might be ignored by the driver.

the same problem should appear with any openGL application. e.g. if you
run "glxgears" and move the window to the 2nd head, rendering should
vanish too.
there is nothing you can do about this, but:
a) try to mirror the output of the built-in screen to the external
screen. this way you have less possibilities to interact with your patch
(since your primary display is occupied by the fullscreen gem window),
but at least you might get output.

b) buy another gfx card (the problem with laptops is, that this usually
means buying another laptop); nvidia chips are known to work well (but
are problematic license wise); i think others (frank) have managed to
get Gem rendering to a projector with intel chipsets.

ah and finally: you should not use "fullscreen" to make a fullscreen
window on the 2nd monitor when not in OS-X land (yet). use [offset 1024
0, dimen 800 600( (or whatever fits your settings) instead.


More information about the Pd-list mailing list