[PATCH libinput 0/5] Disable laptop touchpad on lid close

[James Ye]

On Thu, Jan 5, 2017 at 4:15 PM, James Ye <jye836 at gmail.com> wrote:
> Although a laptop touchpad is usually not accessible when the lid is 
> closed,
> some laptop models suffer from a hardware bug where the touchpad can 
> be
> activated even if the lid is closed.  This bug can be worked around 
> by disabling
> the touchpad when the lid is closed.
> 
> This patch set adds:
> 1: hwdb patch to mark switches as input devices (needs to go to 
> systemd)
> 2: switch interface[1]
> 3: evdev dispatch interface for laptop lid switches
> 4: mechanism for pairing touchpad with lid, and disabling the touchpad
> 5: test cases
> 
> Best regards,
> James Ye

I did a bit of testing on a laptop which suffers from this issue.
The good news is that it works as intended on a real device, which
is expected.  The bad news, however, is that on that laptop
(ASUS ZENBOOK UX32VD) the lid switch does not reliably engage when
you close the lid.  The hardware design is similar across a few models
from that generation of laptops, so other models may be affected too.

In any case, I'll send in revised patches which fix some incorrect
assumptions about events soon.

Cheers,
  James

> 
> 
> [1]: 
> https://lists.freedesktop.org/archives/wayland-devel/2016-January/026349.html
> 
> James Ye (5):
>   udev: mark switches as input devices
>   Add a "switch" interface for parts of the SW_* range
>   Add evdev_dispatch interface for lid switch
>   Pair touchpad and lid_switch for disable
>   test: add tests for lid switch
> 
>  doc/Makefile.am                    |   1 +
>  doc/switches.dox                   |  13 +++
>  src/evdev-mt-touchpad.c            |  47 ++++++++
>  src/evdev-mt-touchpad.h            |   5 +
>  src/evdev.c                        |  92 ++++++++++++++-
>  src/evdev.h                        |   8 ++
>  src/libinput-private.h             |   5 +
>  src/libinput.c                     | 103 +++++++++++++++++
>  src/libinput.h                     | 107 +++++++++++++++++
>  src/libinput.sym                   |   9 ++
>  test/Makefile.am                   |   4 +-
>  test/lid.c                         | 228 
> +++++++++++++++++++++++++++++++++++++
>  test/litest-device-lid-switch.c    |  58 ++++++++++
>  test/litest.c                      |  31 +++++
>  test/litest.h                      |  10 ++
>  tools/event-debug.c                |  34 ++++++
>  udev/90-libinput-model-quirks.hwdb |   6 +
>  17 files changed, 758 insertions(+), 3 deletions(-)
>  create mode 100644 doc/switches.dox
>  create mode 100644 test/lid.c
>  create mode 100644 test/litest-device-lid-switch.c
> 
> --
> 2.9.3
>