Strange Modem

[brad.mugleston at comcast.net]

On Fri, 19 Aug 2005, Rick Stevens wrote:

> brad.mugleston at comcast.net wrote:
> > I just built a file server using an old Pentium II with FC2 but
> > it's got a 180G hard drive on it (for home use).  When I hook it
> > into my home network everything works great - the switch assigns
> > it an IP address and it seems to work fine.  BUt after awhile the
> > modem starts rebooting.  If I unplug the network cable from the
> > comuter the modem goes back to normal.  I've tried two different
> > NIC's in the computer and they both do the same thing.
> >
> > Any ideas?
>
> Uh, serial modem or PCI-based?  If it's PCI, have you looked at the IRQ
> assignments between the modem and the NICs?  (lspci -v)
>

Sorry - it's a Cable Modem - RCA - goes to my Motorola WR850G
Router.  I'll have to check the dmesg and interrupts - get back
ot you later on the rest of it.


thanks

Brad


> Even with a serial modem, it's possible (especially if you're using
> /dev/ttyS1, aka COM2) for the NIC to try to use the same IRQ (IRQ3).
>
> You can also "cat /proc/interrupts" along with "cat /var/log/dmesg" to
> see what's using what.
>
> > About the only other thing funky on this is it will not go into
> > the graphical mode, doesn't like the card/monitor configuration
> > (again, I've used two video cards and two monitors but same
> > results.  This is fine as I don't really plan on using the
> > computer that way - it's just suppose to store all my music and
> > pictures on it...
>
> Have you checked the X startup log to see what it doesn't like?  It may
> also be an IRQ conflict (not uncommon for video cards to use IRQ9 for
> video retrace interrupts...and that can conflict with the IRQ cascade
> to the second 8259 controller).  In fact, a machine that old quite
> likely will have IRQ issues.
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -  Memory is the second thing to go, but I can't remember the first! -
> ----------------------------------------------------------------------
>
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