David Olofson wrote:
> On Saturday 18 August 2001 09:36, Herman Bruyninckx wrote:
> > On Fri, 17 Aug 2001, Dan Peters wrote:
> >
> > [...]
> >
> > > I believe it all has to do somehow with interrupting X calls. Do
> > > you have any experience with running X under rtlinux? I have work
> > > with X many times in a non RT environment and have not had these
> > > problems. Is there a better alternative to running X for doing
> > > graphical stuff under RT linux.
> >
> > Don't use X!
>
> Or make sure you've got a properly configured X server and a video card
> with a decent driver... Some work, but shouldn't by a major issue if you
> need RTLinux on the machine in the first place. (You don't run RTLinux on
> the average workstation anyway.)
The video chip is a C&T 65550, and as far as I know, the server has been
configured properly.
This is part of a control system, which I feel needs RTlinux. The only
reason to use X is to display an image and
display some other data on a display. Are there any better alternatives to
X.
>
>
> > Unless you know exactly what your X driver is doing...
> > The polygons-rendered-per-second race of card manufacturers makes many
> > drivers behave _very_ unfriendly towards other processes (disabling
> > interrupts for too long etc.)
>
> Yeah. Some of this can be fixed by configuring the server properly,
> though. (AFAIK, very few cases are actually hardware problems. Even this
> debated PCI bus stall is a driver bug - some drivers allow the card to
> block the bus, rather than checking the command FIFO status before
> writing.)
>
> //David Olofson --- Programmer, Reologica Instruments AB
>
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