snapshots between X servers

[Franck Juers]

hi,

thanks a lot, I didn't know that...


Franck


2008/3/4, Adam Jackson <ajax at redhat.com>:
>
> On Tue, 2008-03-04 at 17:42 +0100, Franck Juers wrote:
> > Hello,
> >
> > I've tried to do a snapshot of an X server from an other and it
> > doesn't work...
> > I've got one X server which uses display :0.0
> > I've started an other server with "startx -- :8"
> >
> > when I'm working on :0.0, if I do "import -window root -display :8
> > test.bmp" it doesn't work,
> > when I display it, it's not good... but when I do it from the
> > server :8.0 with exactly the same command it works...
> >
> > I've tried one Xnest -ac :8 &
> > when I do the snapshot with the import command it captures :0.0 !!!!
> >
> > Someone could explain ?
>
>
> Hardware servers only have their front buffer while they are active on
> the VT.  When they are switched away, they _lose_ video memory.  The
> pixels are gone.  There's nothing to capture.
>
> - ajax
>
>
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