Re: RT : 2.6.12rc5 + realtime-preempt-2.6.12-rc5-V0.7.47-15

[Lee Revell]

On Tue, 2005-05-31 at 16:53 +0200, Serge Noiraud wrote:
> I have a test program which made a loop in RT to mesure the system
> perturbation.
> It works finely in a tty environment.
> When I run it in an X environment ( xterm ), I get something like if I
> click the Enter key in the active window.
> If I open a new xterm, this is the new active window which receive these
> events.
> These events stop when the program stop.
> 
> I tried with X in RT and no RT : I have the problem.

Try adding:

Option "NoAccel"

to the Driver section of your X config.

Some buggy video drivers can stall the PCI bus for tens or hundreds of
*milliseconds*.  The "via" driver had this problem until I identified
the problem and the Unichrome guys fixed it.  If it goes away with
"NoAccel", then you are having the same problem.

For details search the unichrome-devel archives for "losing interrupts".

Lee

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