https://bugzilla.kernel.org/show_bug.cgi?id=84651
Bug ID: 84651
Summary: Powerbutton not detected/handled on Surface Pro 3
Product: ACPI
Version: 2.5
Kernel Version: 3.16.2
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Other
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 150461
--> https://bugzilla.kernel.org/attachment.cgi?id=150461&action=edit
full dmesg output
Summary:
-------------------------
Power button (and other hardware buttons including volume up/down and
capacitive home button) on the Microsoft Surface Pro 3 fail to function under
3.16. This prevents wake from suspend using the power button. I am using usb
plug/unplug events to wake the device, but I note that power consumption is
very high in suspend and am not sure if this is also a related ACPI issue or
simply due to my use of USB to wake from suspend. Either way, a working power
button would be a step in the right direction.
I'm including as much detail as I feel is relevant here based on review of
other bug reports and my own reading on ACPI. I apologize if I have missed
anything critical and will be happy to amend this report as necessary.
Details:
-------------------------
Under Linux, button presses (power, volume, capacitive home button)
successfully generate System Control Interrupts (both power and volume buttons
increment the interrupt counter). Test method: monitoring /proc/interrupts and
/sys/firmware/acpi/interrupts. Attachments include pre/post interrupts output.
However, they are either not exposed as ACPI devices or are not properly
handing the event off to be handled by acpid or systemd.
Tests:
-------------------------
Buttons are confirmed physically working under dual boot into Windows. Power
button successfully powers on device when booting to Linux.
Running acpid and acpi_listen generates no events when pressing the power (or
volume) hardware button.
xinput shows no input device for the power button.
Running evtest on /dev/input/event0 (associated with
/proc/acpi/button/lid/LID0) shows no events either (this may be a lid sensor
unassociated with power button). Directly monitoring
/proc/acpi/button/lid/LID0/state also shows no change on power button presses.
There are no other items under /proc/acpi/button.
As mentioned, there is a button device under /proc/acpi/button/lid/LID0
associated with /dev/input/event0 but I’m not sure/convinced this is the
hardware powerbutton or if it is a laptop close sensor for the detachable
keyboard cover for this unit (which I do not own). Regardless, it does not
change state when pressing the power button (as monitored by watching
/proc/acpi/button/lid/LID0/state and pressing button).
dmesg ACPI power notices (full dmesg in attachments)
-------------------------
# dmesg -t | grep -i power
ACPI: Power Resource [PRWF] (on)
ACPI: Power Resource [CAMP] (on)
ACPI: Power Resource [PAUD] (on)
ACPI: Power Resource [TPWR] (on)
Attachments:
-------------------------
I am attaching relevant output including:
# dmesg
# cat /proc/acpi/wakeup
# grep . /sys/firmware/acpi/interrupts/* (pre and post power button depress)
# grep . /sys/bus/acpi/devices/*/hid
# ls /sys/bus/acpi/drivers/*/
Kernel / Hardware summary
-------------------------
Linux palimpsest 3.16.2-1-ARCH #1 SMP PREEMPT Sat Sep 6 13:12:51 CEST 2014
x86_64 GNU/Linux
description: Laptop
product: Surface Pro 3 (Surface_Pro_3)
vendor: Microsoft Corporation
version: 1
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