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Subject: Re: Polling /proc/apm causes usb hiccups and clock drift
From: Thomas Hood <jdthood@mail.com>
To: linux-kernel@vger.kernel.org
Cc: jstrand1@rochester.rr.com
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James D Strandboge <jstrand1@rochester.rr.com> wrote:
> polling /proc/apm causes the webcam in xawtv to skip.
> [...]
> Is this a kernel apm bug or BIOS problem?

The apm driver calls the APM BIOS with interrupts disabled
each time /proc/apm is read.  This appears to be taking
too much time away from video processing.




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