*BSD News Article 71421


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From: brian@awfulhak.demon.co.uk (Brian Somers)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: silo error during X11
Date: 19 Jun 1996 06:35:21 +0100
Organization: Coverform Ltd.
Lines: 25
Message-ID: <4q83ip$cp@anorak.coverform.lan>
References: <4pd7r0$pdd@soggy.eis.net.au> <4pop60$6ta@news.clinet.fi>
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Mika Ruohotie (mickey@cantina.clinet.fi) wrote:
: In article <4pd7r0$pdd@soggy.eis.net.au>, Ernie Elu <ernie@eis.net.au> wrote:
: >For several months now I have been plagued with serial port errors (silo
: >overflow) during hard disk accesses when running X11. They happen almost

: ditto

: >Does this happen to anyone else?

: to me, but it just happens, does nothing coz i dont dialup

If you've got a serial port that'll allow jumpering on IRQ 2/9, try that.
The problem is probably that you've got an IDE disk that's interrupting
the CPU all over the place.  If its IRQ is more important than the serial
ports IRQ, and the disk interrupts happen _really_ often, the serial port
doesn't get serviced in time.  By the time the serial interrupt routine
is called, the UARTs flag says "you missed something!".

Of course changing the UART to IRQ 2/9 may kill your hard drive !  The
real solution is to turf your IDE drive or at least get a SCSI drive for
the filesystem with the hugh throughput.

--
Brian <brian@awfulhak.demon.co.uk>
Don't _EVER_ lose your sense of humour....