platform-api

Qt apps can't run under Mir [Gtk-WARNING **: cannot open display: ]

Bug #1626804 reported by Daniel van Vugt
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Canonical System Image
Invalid
Undecided
Unassigned
platform-api
Invalid
Undecided
Unassigned
platform-api (Ubuntu)
Invalid
Undecided
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qtubuntu (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Qt apps can't run under Mir - fail with a Gtk error trying to open an X display (!?)

$ qterminal --desktop_file_hint=unity8
Loading module: 'libubuntu_application_api_desktop_mirclient.so.3.0.0'

(qterminal:9053): Gtk-WARNING **: cannot open display:

$ qtcreator --desktop_file_hint=unity8
Loading module: 'libubuntu_application_api_desktop_mirclient.so.3.0.0'

(qtcreator:9083): Gtk-WARNING **: cannot open display:

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Hmm, ubuntu-app-launch works for Unity8. But it would be nice if we could figure out how to make Qt apps generally just work in any Mir server without such workarounds.

tags: added: unity8-desktop
Revision history for this message
Alan Griffiths (alan-griffiths) wrote :

Something like mirrun?

Revision history for this message
Alan Griffiths (alan-griffiths) wrote :

Really, I've been running qt apps under mir_demo_server, miral-shell and egmde for ages, there isn't a problem. You need:

sudo apt-get install qtubuntu-desktop mir-utils

And then:

mirrun qterminal

Changed in canonical-devices-system-image:
status: New → Invalid
Changed in platform-api:
status: New → Invalid
Changed in platform-api (Ubuntu):
status: New → Invalid
Changed in qtubuntu (Ubuntu):
status: New → Invalid
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Thanks. That led me to discover it was the presence of QT_QPA_PLATFORMTHEME that caused the failure.

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