https://bugzilla.kernel.org/show_bug.cgi?id=24002
Summary: No battery status in /proc/acpi
Product: ACPI
Version: 2.5
Kernel Version: 2.6.36
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Battery
AssignedTo: acpi_power-batt...@kernel-bugs.osdl.org
ReportedBy: d...@acad.umass.edu
Regression: No
Created an attachment (id=38512)
--> (https://bugzilla.kernel.org/attachment.cgi?id=38512)
boot.msg
Forgive me if this has been addressed. I am not finding any current solutions
to the problem.
On a generic laptop with a MS-171F motherboard, BAT1 is detected on boot:
<6>[ 7.147120] ACPI: Battery Slot [BAT1] (battery present)
<6>[ 7.161354] ACPI: AC Adapter [ADP1] (on-line)
but /proc/acpi/battery/info and proc/acpi/battery/state have no data:
cat /proc/acpi/battery/BAT1/state
cat: /proc/acpi/battery/BAT1/state: No such device
ACPI logs the following to /var/log/messages every few minutes:
Nov 28 09:55:32 xxx kernel: [840329.315595] ACPI Exception: AE_BAD_PARAMETER,
Returned by Handler for [EmbeddedControl] (201007\
02/evregion-474)
Nov 28 09:55:32 xxx kernel: [840329.315605] ACPI Error (psparse-0537): Method
parse/execution failed [\_SB_.PCI0.SBRG.EC__.BAT1\
.UPBI] (Node ffff88011bafc268), AE_BAD_PARAMETER
Nov 28 09:55:32 xxx kernel: [840329.315616] ACPI Error (psparse-0537): Method
parse/execution failed [\_SB_.PCI0.SBRG.EC__.BAT1\
._BIF] (Node ffff88011bafc308), AE_BAD_PARAMETER
Nov 28 09:55:32 xxx kernel: [840329.315626] ACPI Exception: AE_BAD_PARAMETER,
Evaluating _BIF (20100702/battery-404)
There is only one battery in the laptop and the kernel finds it as BAT1 not
BAT0. The battery works fine and, in the past, linux has correctly detected
the status. I have not been able to successfully build older kernels older
than 2.6.34 with OpenSuse 11.3 (too hard to untangle whatever the distribution
is doing), but I know that the problems existed with with OpenSuse 11.1 (2.6.27
kernel), went away with 11.2 (2.6.31 kernel), and are back with 11.3 (2.6.34
and later kernels).
The battery works fine but obviously there is no graceful shut down when it
runs down since there is no report of battery power in /proc/acpi
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