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[Bug 1515515] Re: Shells that inject user input events need to agree with the system compositor on the clock to use

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>
Date: Mon, 07 Dec 2015 09:41:04 -0000
Reply-to: Bug 1515515 <1515515@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Also affects: mir (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1515515

Title:
  Shells that inject user input events need to agree with the system
  compositor on the clock to use

Status in Mir:
  Fix Committed
Status in QtMir:
  Invalid
Status in mir package in Ubuntu:
  New

Bug description:
  If we try to change the input platforms to also use CLOCK_MONOTONIC
  (or std::chrono::steady_clock) in mir we also need to change unity8.
  Otherwise input resampling will get confused by the large difference
  in time stamps and long press calculation will fail.

  Mir should provide an interface to the clock used for user input event
  time stamps - both server and client side.

  Qtmir should ensure that it uses the same clock and that dispatch
  within the qtEvent loop does not cause a mix of used clocks..

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