[Bug 1210823] Re: Convertibles: Switching between laptop mode and tablet mode needed

[Till Kamppeter]

** Attachment added: "/etc/acpi/events/twist-tablet-disabled"
   https://bugs.launchpad.net/ubuntu/+source/acpid/+bug/1210823/+attachment/3767349/+files/twist-tablet-disabled

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https://bugs.launchpad.net/bugs/1210823

Title:
  Convertibles: Switching between laptop mode and tablet mode needed

Status in “acpid” package in Ubuntu:
  New

Bug description:
  See

  https://blueprints.launchpad.net/ubuntu/+spec/client-1305
  -convertibles-and-touch-desktop

  Convertibles (like the Lenovo Thinkpad Twist) have two modes: Laptop
  mode where the desktop is controlled with the built-in keyboard and
  the built-in touchpad (or an external mouse) and tablet mode where the
  keyboard is folded away behind the screen and the desktop is
  controlled by the touch screen only.

  In laptop mode the built-in touchpad must be active and clicking or
  tapping a text input field should not pop up an on-screen keyboard,
  whereas in tablet mode the built-in touchpad should be deactivated so
  that the turned over laptop lid lying on the touchpad does not trigger
  mouse actions and tapping input fields has to pop-up the on-screen
  keyboard.

  This can be easily done by a an ACPI-triggered script, as described on

  http://www.thinkwiki.org/wiki/Installing_Ubuntu_12.10_on_Thinkpad_Twist#Automatic

  There are two files in /etc/acpi/events/ which assign the call of a
  script in /etc/acpi/ when the device is put into laptop mode or into
  tablet mode. The script should turn on the keyboard pop-up and turn
  off the touchpad when going into tablet mode and turn off the keyboard
  pop-up and turn on the touchpad when going into laptop mode.

  Some remarks:

  - The ACPI events mentioned on the linked site are for the Lenovo
  Thinkpad Twist, they can be different on other convertibles.

  - The script does not activate keyboard pop-up. One needs to add

  ----------
  if [ "$MODE" = "1" ]; then
      sudo -iu $user onboard &
  else
      sudo -iu $user killall onboard
  fi
  ----------

  to get this.

  - The script turns off the touch screen in laptop mode. This is not
  actually needed.

  - The script uses two functionalities which got removed in Saucy.
  First, /usr/share/acpi-support/power-funcs with the function
  getXconsole to find out who the user logged in on the desktop is
  ($user, the script runs as root), and second, xinput support for the
  touchpad (can also be a bug).  Perhaps one needs to use gsettings now.

  When finding a way to turn off and on the touchpad and a way to find
  the desktop user, one could easily update the script so that it works
  with Saucy. One also needs to find out the ACPI events for mode
  switching on the different models of convertibles.

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