Periodical creation of /dev/apmX entries

John Baldwin jhb at
Tue Jan 8 07:00:04 PST 2008

On Monday 07 January 2008 05:35:41 pm Marcus von Appen wrote:
> Hi,
> does somebody know, why the current RELENG_7 tends to generate new
> /dev/apmX entries every 45 seconds on my Dell Dimension 4600?
> After a few hours there were around 900 /dev/apm entries, ranging from
> /dev/apm to dev/apm898.
> The kernel does not have device apm built in and dmesg does not reveal
> anything as well.
> # uname -a
> FreeBSD 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #6: Mon Jan  7 23:10:13 CET 2008     root at  i386
> Any hints on what could cause this behaviour are really appreciated.
> If you need further system details, let me know.

ACPI creates /dev/apmX entries each time you open /dev/apm, so you have
something that is stat()'ing or open()'ing /dev/apm every 45 seconds.

John Baldwin

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