Damien Roullier wrote:
>
> Hi,
>
> I think there are problems with some graphic cards and some X server may
> involve delays in LXRT mode in RTAI, is it right ? and which cards and X
> server don't have these problems ?
Not only in LXRT mode, and not only with RTAI (also with RT-Linux). My
S3 card
totally kills any realtime behavior there is, with jitter upto 50 msec
(0.05 sec). I looked
into it a while back and noticed this didn't happen with XFree 3.3.X and
it goes
away when turning off acceleration (although X gets unusable slow when
doing that :-/).
The low latency ppl also warm against using the linux framebuffer
drivers, although they
don't have hardrealtime so this warning might not be of importance for
RTAI.
I am interested in hearing what hardware you use and what X server.
>
> I also would like to know which processors are the best for RTAI, and
> thus if there are problems with some of them.
>
> Thanks for your answers.
> Regards.
>
> Damien
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