From: Paolo Dovera <pdovera@bmind.it>
To: linux-c-programming@vger.kernel.org
Subject: problem to access /proc/acpi/battery/BAT1/* files
Date: Sun, 02 Nov 2003 21:43:11 +0100 [thread overview]
Message-ID: <3FA56C5F.1080600@bmind.it> (raw)
Hi all,
on my RH9 2.6.0-test6 I noticed a strange log in /var/log/messages:
Oct 17 18:15:16 localhost kernel: dswload-0269: *** Error: Looking up
[PBST] in namespace, AE_ALREADY_EXISTS
Oct 17 18:15:16 localhost kernel: psparse-0589 [293932]
ps_parse_loop : During name lookup/catalog, AE_ALREADY_EXISTS
Oct 17 18:15:16 localhost kernel: psparse-1121: *** Error: Method
execution failed [\_SB_.PCI0.LPC0.BAT1._BST](Nodec12ab328),
AE_ALREADY_EXISTS
Oct 17 18:15:25 localhost kernel: dswload-0269: *** Error: Looking up
[PBST] in namespace, AE_ALREADY_EXISTS
Oct 17 18:15:25 localhost kernel: psparse-0589 [294043]
ps_parse_loop : During name lookup/catalog, AE_ALREADY_EXISTS
Oct 17 18:15:25 localhost kernel: psparse-1121: *** Error: Method
execution failed [\_SB_.PCI0.LPC0.BAT1._BST] (Node c12ab328),
AE_ALREADY_EXISTS
the problem arises when on my system two programs access concurrently
the files into /proc/acpi/battery/BAT1/*
for example I run the cpufrequency, a daemon to switch CPU frequency on
my P4 laptop http://sourceforge.net/projects/cpufrequency/
(this program checks every some seconds the status of battery)
and I use
watch -n 8 "cat /proc/acpi/battery/BAT1/*"
to see the battery state in another xterm.
Is there any kind of lock to access the status of battery?
thanks for your time,
Paolo Dovera
reply other threads:[~2003-11-02 20:43 UTC|newest]
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