Bug 3308

Summary:	hard reset after accessing /proc/acpi/battery/C132/state - Evo N800c
Product:	ACPI	Reporter:	jeff
Component:	Power-Battery	Assignee:	Shaohua (shaohua.li)
Status:	CLOSED PATCH_ALREADY_AVAILABLE
Severity:	high	CC:	acpi-bugzilla
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.9-rc1-bk4	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	Output of acpidmp Output of dmesg -s40000 Output of dmidecode Output of cat /proc/interrupts Output of lspci -vv .config for kernel 2.6.8-1.541

Description jeff 2004-08-29 17:30:36 UTC

Distribution: Fedora Core (development)
Hardware Environment: Compaq Evo N800c
Software Environment:
Problem Description:

Accessing /proc/acpi/battery/C132/state causes laptop to reset.  Tried under
Fedora kernels:

kernel-2.6.7-1.515
kernel-2.6.7-1.517
kernel-2.6.8-1.524
kernel-2.6.8-1.526
kernel-2.6.8-1.532
kernel-2.6.8-1.533

Laptop does not reset if you boot Windows XP (completely updated except SP2). 
No oops messages or anything in the log.

Steps to reproduce:
As any user (even non-root):

1. cat /proc/acpi/battery/C132/state
2. Wait a few seconds.
3. Laptop resets

Started out as a bug in Red Hat's bugzilla:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=131062

Comment 1 jeff 2004-08-29 17:44:41 UTC

Created attachment 3590 [details]
Output of acpidmp

Comment 2 jeff 2004-08-29 17:45:37 UTC

Created attachment 3591 [details]
Output of dmesg -s40000

Comment 3 jeff 2004-08-29 17:46:17 UTC

Created attachment 3592 [details]
Output of dmidecode

Comment 4 jeff 2004-08-29 17:46:59 UTC

Created attachment 3593 [details]
Output of cat /proc/interrupts

Comment 5 jeff 2004-08-29 17:48:14 UTC

Created attachment 3594 [details]
Output of lspci -vv

Comment 6 Len Brown 2004-09-02 18:54:27 UTC

if you do the access with no window system running,
do you see anything on the (LCD) console?

I don't suppose this model has a serial debug console?

any chance you can reproduce with the latest kernel.org kernel?

please attach the .config being used.

Comment 7 jeff 2004-09-02 21:36:33 UTC

Created attachment 3626 [details]
.config for kernel 2.6.8-1.541

Comment 8 jeff 2004-09-02 21:44:32 UTC

> if you do the access with no window system running,
> do you see anything on the (LCD) console?

No, there's nothing.

> I don't suppose this model has a serial debug console?

No, there's no serial port built in.  I do have a USB->serial converter,
but I haven't seen any evidence that I could use that to debug the kernel.

> any chance you can reproduce with the latest kernel.org kernel?

I'll take a look tomorrow, but the kernel from Fedora Development I'm using is
based upon a very recent kernel snapshot.

> please attach the .config being used.

See previous post.

Comment 9 Len Brown 2004-11-16 22:50:16 UTC

same with 2.6.9-based kernel?

Comment 10 jeff 2004-11-16 23:02:38 UTC

No, the problem does not appear with recent 2.6.9-based kernels from Fedora
Development or the kernel released with Fedora Core 3.