> "Brian S. Julin" wrote:
> >
> > On Mon, 17 Sep 2001, Sven Garbade wrote:
> > > I compiled libggimisc to play with the vertical retrcace detection,
> but
> > > don't understand this error:
> >
> > For some reason your kernel fbdev driver is failing the request
> > for the ray position. Check that you are a) running matroxfb as
> > your fbdev driver and b) that you have a FBIOGET_VBLANK in the
> linux/fb.h
> > that matches your kernel. I am not sure at what version the support for
> > the vertical retrace was added.
>
> It works under kernel 2.4.5, but not under 2.2.19.
AFAIK compilation of the fbdev-target fails with any 2.2.x kernel. That's
why, it
doesn't work under 2.2.x.
> > > This runs on a Debian Progeny Box, Xfree 402, Kernel 2.2.19 and a
> Matrox
> > > G400 card. Does GetRayPos also runs with the dga target?
> >
> > WaitRayPos will eventually run under DGA when I get around to it, but
> > I have looked at the DGA driver code and all the drivers use
> busy-polling
> > to wait for the retrace.
>
> I ask this because under X the vertcal refresh rate is almost 100 Hz,
> under fbdev only nearly 60 Hz. So I have to figure out, how to configure
> a framebuffer mode with 1024x768x16 at 100 Hz.
Seems, that you haven't configured /etc/fb.modes. If this is the case, then
it
assumes you have a standard VGA monitor, so - no wonder - that you have
only 60 Hz.
--
CU,
Christoph Egger
E-Mail: [EMAIL PROTECTED]
GMX - Die Kommunikationsplattform im Internet.
http://www.gmx.net
