https://bugzilla.kernel.org/show_bug.cgi?id=45221
Summary: Wrong ACPI event sent when unplug the AC on thinkpad
e530
Product: ACPI
Version: 2.5
Kernel Version: 3.5.0
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: enrico.tagliav...@gmail.com
Regression: No
Created an attachment (id=76261)
--> (https://bugzilla.kernel.org/attachment.cgi?id=76261)
acpi dump, dmesg and syslogs
When I boot the computer with the AC plugged and then unplug it the system
doesn't always catch the change. I run KDE 4.8 and its power management still
says the AC is still connected. KDE relies on upower so on ACPI IIRC. I done
some edit to the default acpid scripts to be more verbose (it is attached with
the other stuff). What I see when I unplug the AC is:
ac_adapter ACPI0003:00 00000080 00000001
which is indeed the wrong event! This event is the one when you plugin the AC.
I checked /sys/class/power_supply/AC/online and it says 0, so the change is
detected correctly.
When I boot the computer without the AC attached the correct state is
recognized by ACPI and KDE. If I insert the AC and then unplug it again the
issue sometimes happens again.
This is a thinkpad e530 (edge series) computer running gentoo linux (mostly the
stable branch) with kernel gentoo-source-3.5.0. I can attach my kernel config
if needed.
I think this issue is caused by the EC to become confused by something the
kernel does. For example in this moment when the AC detector works the F1-12
keys and the multimedia keys are swapped! I have the legacy setting in the BIOS
(meaning if I hit the F1 key I get the F1 key, not the Mute speaker even
generated), but still sometimes the settings swaps at runtime!
I have attached a tar archive (sorry but they are a lot of files) with acpidump
binary output, dmesg after a fresh boot from battery and AC and the syslog when
switching from the AC to the battery (from an AC boot) and from battery to AC
(from a battery boot).
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