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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

OK, it appears to be purely a Unity8/QtMir bug. Unity8 does not allow
gaps (splash screens) in the lifecycle of a connection's surface:

Connect
Create splash window
Destroy splash window
Create app window (still using the original connection)

This succeeds from the client's perspective (Xmir) but Unity8/QtMir
fails to display the second window (which is the main app window).

Using other simpler apps I can reproduce the same bug. There's a strange
delay in Unity8 -- If you can pause for 5-10 seconds between creating
the first and second window then Unity8 does work.

Workaround: gimp --no-splash


** Changed in: xorg-server (Ubuntu)
       Status: Confirmed => Invalid

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

** Changed in: qtmir (Ubuntu)
       Status: New => Confirmed

** Also affects: qtmir
   Importance: Undecided
       Status: New

** Changed in: qtmir
       Status: New => Confirmed

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1501346

Title:
  Gimp fails to start w/ Xmir running in '-rootless -flatten' mode under
  Unity 8

Status in QtMir:
  Confirmed
Status in qtmir package in Ubuntu:
  Confirmed
Status in unity8 package in Ubuntu:
  Confirmed
Status in xorg-server package in Ubuntu:
  Invalid

Bug description:
  I'm trying to run Gimp in a Vivid + overlay PPA Unity 8 desktop
  session using Xmir from the overlay PPA with the '-rootless -flatten'
  Xmir options. Gimp fails to start in this situation.

  I've attached the application and unity8 log files.

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