From mboxrd@z Thu Jan 1 00:00:00 1970 From: Theodore Morse Subject: Re: Ocasional hangs Date: Sat, 21 Dec 2002 21:51:54 -0800 (PST) Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20021222055154.47245.qmail@web13705.mail.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: acpi Cc: Vicente Aguilar List-Id: linux-acpi@vger.kernel.org I too have been experiencing what Vicente Aguilar is going through with his battery problems. I upgraded to the 2.4.20 kernel, and every 4-5 hours my system hangs because batt-stat can't get the battery information. Once I triggered it myself as I manually did a cat on /proc/acpi/battery... If anyone has any clue as how to fix this, it would be most helpful. My laptop is a Toshiba Satellite 1905-S303. I was running kernel 2.4.20 with the latest acpi patch. Thanks, Ted Morse ------ original message by Vicente ------ Hi lists I've been experiencing ocasional system hangs for some time now, with kernels 2.4.19 and 20 and the latests ACPI patches of the moment. After using the computer for a few hours (2-3 maybe) it just hangs, the system doesn't even responds to pings over the network, and you can hear de fans go full speed as if the CPU has gone to 100% capacity (this is on a laptop, a Compaq Presario 905EA). I think it is related to ACPI, here's why: with acpi-20021205 these hangs were really easy to reproduce by just doing a simple cat of /proc/acpi/battery/stat. You read the proc file, then the system hanged, as simple as that. With all the others acpi patches the hangs have been and are (now with 2.4.20 and acpi-20021212) *very* ocasional, but I've done the following experiment: I usually use Gnome and have the battstat-applet loaded. I find weird that such a simple program (it just reads the battery stats every now and then) uses 3% of the CPU (a Mobile Athlon XP 1500+). I've tried unloading the applet, and right now I've got an uptime of almost 9 hours, while before the system should have already crashed. I know that the battstat applet eating 3% of the CPU is maybe only battstat's fault, but I think that the system hangs may be related and being caused by ACPI when someone reads the battery status. Anyway if this theory was true, it only hangs *sometimes* when you read the batt stats, as the applet is running and checking them often and the system only crashes after a couple of hours, so it's hard to reproduce the situation. I would also like to note that maybe this isn't really ACPI's fault, as the hardware in this laptop isn't still fully supported by Linux. Maybe the bug is somewhere else but it is ACPI who triggers it. Anyway, I know all this info is very vague for a bug report, but if maybe someone else could reproduce the situation with the same laptop or even another system... -------- end ----------- ===== Ted Morse Student/Programmer University of Evansville/Ciholas Enterprises __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com ------------------------------------------------------- This SF.NET email is sponsored by: Order your Holiday Geek Presents Now! Green Lasers, Hip Geek T-Shirts, Remote Control Tanks, Caffeinated Soap, MP3 Players, XBox Games, Flying Saucers, WebCams, Smart Putty. T H I N K G E E K . C O M http://www.thinkgeek.com/sf/