Re: Update on /dev/fd0 and Sound Freeze

Helge Hafting (helge.hafting@daldata.no)
Mon, 21 Sep 1998 09:38:23 +0100


In <Pine.LNX.4.00.9809181657530.21638-100000@shells.technojunkie.com>, on
09/18/98
at 05:07 PM, Jeremy Katz <katzj@technojunkie.com> said:

>Okay, I've finally had the time to look more carefully into this problem.
>I started sound playing and then started writing to the floppy
>continuously in each case to see if I could get the machine to freeze.
>Here are the results from various kernels.

>2.0.35 - didn't lock in over an hour of writes (repeated twice) 2.1.121
>UP - locked within ten minutes of beginning writing to the floppy 2.1.122
>SMP - locked twice (once in about two minutes; the next within six)

>The only anomaly I noticed under 2.0.35 was that the sound seemed to
>stutter some while writing to the floppy.

>This leads me to believe that it is NOT, at least not completely, a
>hardware problem. Instead, it seems to be a problem within the kernel
>itself. If it is a hardware based problem, then the 2.0 series seems to
>have some sort of work-around for it. Even with this being the case, the
>best workaround may be to just stop sound when writing to the floppy
>device. I would implement this though I have no clue where to start with
>doing this :)

If at all possible, try to not stop the sound. It is ok to have a slower
floppy when sound is playing because of some hardware constraint. Having
sound just stop will be irritating. And it is so noticeable that lots of
novice users will complain all over the place. :-(

Helge Hafting

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