[LinuxPPS] kernel does not see PPS on serial port

LICHTENBERGER Janos lityi at sas.elte.hu
Fri Mar 7 12:24:57 CET 2008


>
> Aside from what Rodolfo said about it being strange that no driver is
> shown for IRQ4,  I also noticed that IRQs are being assigned to
> different CPUs. Can you check with the older kernel if a driver is
> assigned and if IRQs are assigned to multiple CPUs or only to one of
> them?

As far as I recall, it was assigned to CPU1 with the old kernel too - I
have to reboot the system and check it, give me a few minutes.


> Does the order of loading modules matter?  For example, if 'pps' needs
> to load before the 8250 serial driver, then interesting things can
> happen when the serial driver is compiled into the kernel but the pps
> driver loads later.  I think there is a mechanism to ensure that the
> module is loaded and initialized before the inbuilt driver is
> initialized, so even if you have that strange case it should be
> possible to fix it.
>
>
Both are compiled as module


Janos

- Cirilo
>


-- 
-- 
Dr. János Lichtenberger
Space Research Group,
Eötvös University,
Budapest, Pf 32 H-1518 Hungary
Tel: +36-1-372 2934
Fax: +36-1-372 2927



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