title: Ubuntu Touch App: "Error opening shm"
body: <p>I am developing an app for Ubuntu Touch, sometimes it crashes with:</p>
  
  <pre><code>t_shm() at lttng-ust-comm.c:886)
  libust[4253/4256]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:886)
  libust[4253/4255]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
  libust[4253/4255]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
  UbuntuWindow - regular geometry
  UbuntuWindow::handleSurfaceFocusChange(focused=true)
  UbuntuWindow::handleSurfaceResize(width=1200, height=1862)
  UbuntuClipboard - Got invalid serialized mime data. Ignoring it.
  UbuntuWindow::handleSurfaceFocusChange(focused=false)
  UbuntuWindow::handleSurfaceFocusChange(focused=true)
  UbuntuClipboard - Got invalid serialized mime data. Ignoring it.
  UbuntuWindow::handleSurfaceFocusChange(focused=false)
  UbuntuWindow::handleSurfaceFocusChange(focused=true)
  UbuntuWindow::handleSurfaceFocusChange(focused=false)
  </code></pre>
  
  <p>I have no idea what could that mean or where to even start debugging.
  Apparently this error affects some other apps, but I couldn't google anything useful.
  Can you give me some pointers about what could that mean and where can I start looking for an answer?</p>
  
  <p>EDIT:It works very well on desktop, the problem is only on the device.
  (Nexus 7, Ubuntu Touch Utopic)</p>