http://bugzilla.kernel.org/show_bug.cgi?id=12187
Summary: battery status info dissapears on MSI PR200
Product: ACPI
Version: 2.5
KernelVersion: 2.6.28-rc5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Battery
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Latest working kernel version:2.6.27.4
Earliest failing kernel version:2.6.27.5
Distribution: Gentoo
Hardware Environment: MSI PR200
Software Environment:
Problem Description:
http://bugzilla.kernel.org/show_bug.cgi?id=10855
https://bugs.gentoo.org/show_bug.cgi?id=248452
Some time after booting the laptop the system stops seeing the battery and
ac_adapter info in /proc/acpi/{battery,ac_adapter}.
For example, with fully charged battery and power cable connected:
looptop ~ # cat /proc/acpi/battery/BAT1/state
present: no
looptop ~ # cat /proc/acpi/ac_adapter/ADP1/state
state: off-line
The problem existed before 2.6.26-rc6, then, in 2.6.26-rc6 it stopped
happening. Then I switched to stable gentoo kernels, and it resurfaced at
upgrade from gentoo-sources-2.6.27-r1 to gentoo-sources-2.6.27-r4, based on
vanilla 2.6.27.3 and 2.6.27.7, respectively. The offending patch was a patch
upgrading from 2.6.27.4 to 2.6.27.5. Then I reproduced the problem on
2.6.28-rc5.
I'm attaching the dmesg output (with DEBUG printouts from drivers/acpi/ec.c).
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