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[Bug 1532202] Re: [android] External monitor slows rendering

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>
Date: Thu, 28 Jan 2016 02:40:44 -0000
Reply-to: Bug 1532202 <1532202@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

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

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https://bugs.launchpad.net/bugs/1532202

Title:
  [android] External monitor slows rendering

Status in canonical-pocket-desktop:
  In Progress
Status in Mir:
  Fix Committed
Status in mir package in Ubuntu:
  New

Bug description:
  Seen on mako (mir-0.18) - Gerry reports also on Flo.

  Setup:

  sudo stop lightdm
  mirbacklight
  $ mir_demo_server --file host --window-manager system-compositor --display-config sidebyside&
  $ MIR_CLIENT_PERF_REPORT=log bin/mir_demo_server --host host --display-config sidebyside --launch-client mir_demo_client_egltriangle

  Observe: triangle spins evenly with FPS around 60.

  Test: Plug in external monitor

  Expect: triangle spins evenly with FPS around 60.
  Actual: triangle motion slows and jerks with FPS around 50.

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