Re: CD Audio Interferes with Modem.

[Damacus <damacus@bastion.yi.org>]

Yes, it's totally possible and fairly probable.  I've had this problem in the
past, but in my case, it was excessive SCSI access to my HDDs on a 486
box that were taking away from the modems abilities. 

I didn't receive any help here, but I did eventually find the problem.

http://www.luci.org/luci-discuss/199912/msg00030.html

(hdparm -u1 /dev/device)

Damacus


On Thu, Dec 19, 2002 at 03:49:54PM -0600, Al Gatton wrote:
> Could it be possible that the CD audio is so busy reading from the drive
> that the interrupt driven device is not allowing the processor to 'see' all
> the ping requests in order to reply to them? try the pings while writing
> (with verify) to a floppy drive, I would expect 'some' loss but not nearly
> as bad as the CD ROM.
> 
> 
> ----- Original Message ----- 
> From: "Tesla Coil" <tescoil@ilbbs.com>
> To: <luci-discuss@luci.org>
> Sent: Sunday, December 15, 2002 6:29 PM
> Subject: CD Audio Interferes with Modem.
> 
> 
> > This is a weird one -- I thought at first that it was merely
> > a Frequently Recurring Coincidence...
> >
> > - Audio CD off, ping:
> >
> >  30 packets transmitted, 30 received, 0% loss, time 29319ms
> >  rtt min/avg/max/mdev = 159.550/159.917/159.967/0.510 ms
> >
> > - Start audio CD, repeat ping:
> >
> >  30 packets transmitted, 17 received, 43% loss, time 160849ms
> >  rtt min/avg/max/mdev = 149.831/166.896/259.890/23.719 ms
> >
> > - Audio CD off, repeat ping:
> >
> >  30 packets transmitted, 30 received, 0% loss, time 29299ms
> >  rtt min/avg/max/mdev = 149.951/160.895/169.934/3.964 ms
> >
> > - Start audio CD, repeat ping:
> >
> >  30 packets transmitted, 25 received, 16% loss, time 203419ms
> >  rtt min/avg/max/mdev = 159.514/175.010/379.760/48.902 ms
> >
> > Modem on IRQ 3; audio card on IRQ 4; CDROM on IRQ 15.
> >
> > A similar unresolved report of this from 1999.  We have in
> > common external modems, but he says he has no problem with
> > regular audio CDs--my problems have been regular audio CDs.
> > http://lists.suse.com/archive/suse-linux-e/1999-Jun/2648.html
> >
> >
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> >
> 
> 
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