[Bug 1767559] Re: Provide libinput 1.10.5 in bionic-updates to fix specific touchpad and keyboard issues

[seanlano]

This is the first time I've submitted an SRU request - let me know if
there is more detail I need to add

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Title:
  Provide libinput 1.10.5 in bionic-updates to fix specific touchpad and
  keyboard issues

Status in libinput package in Ubuntu:
  New

Bug description:
  This is an SRU request to bring the libinput 1.10.5 microrelease to
  bionic-updates.

  Bionic ships with 1.10.4, but the 1.10.5 microrelease fixes several
  highly specific issues with Lenovo T440, T450s and X280 and Dell XPS13
  L322X laptops. See: https://lists.freedesktop.org/archives/wayland-
  devel/2018-April/037934.html

  
  [Impact] 

   * Users of Dell XPS13 L322X laptops have an almost unusable touchpad
  out-of-the-box with Bionic. This has been reported in
  https://bugs.launchpad.net/libinput/+bug/1746740 and fixed upstream in
  https://bugs.freedesktop.org/show_bug.cgi?id=104990 .

   * Users of Lenovo T440, T450s and X280 laptops also have suboptimal
  touchpad experiences.

  
  [Test Case]

   * The issue can be reproduced on any Dell L322X laptop, by booting
  the Bionic live CD. The touchpad will only work with the slightest
  touch, any more amount of touch pressure falsely triggers the palm
  detection and the cursor won't move.

   * Manually overriding the HWDB with the patches available in
  https://bugs.freedesktop.org/show_bug.cgi?id=104990 fixes the issue.

   * These patches have been released in libinput 1.10.5.

   * With the patched HWDB or latest microrelease, the touchpad works
  properly out-of-the-box.

  
  [Regression Potential] 

   * Regressions are highly unlikely, changes will only affect users
  with the above mentioned devices.

  
  [Other Info]

  It is worth noting that the Dell XPS13 L322X is from the Sputnik
  series of "Developer Edition" laptops from Dell, which are supposed to
  have excellent Ubuntu support and came pre-installed with Ubuntu 12.04
  when first released. Every release from 12.04 to 17.10 had perfect
  out-of-the-box touchpad support, so this bug is a regression. I
  realise this is because of the change away from synaptics as the input
  driver, but in terms of user experience presents a serious regression.

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