QuickGUI shows empty window for 13 seconds on load

[N0rbert]

Steps to reproduce:

1. Have Debian 11.9 installed with all updates

2. Install QuickEmu and QuickGUI from focal PPAs:

   sudo apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com 824A27DD09DEDA33BF7835962EA8F35793D8809A 7DEE66F0FD28828F3F2E647FF196B5DB0E9C0606
   cat <<EOF | sudo tee /etc/apt/sources.list.d/quickgui.list
   deb http://ppa.launchpad.net/flexiondotorg/quickemu/ubuntu focal main
   deb-src http://ppa.launchpad.net/flexiondotorg/quickemu/ubuntu focal main
   deb http://ppa.launchpad.net/yannick-mauray/quickgui/ubuntu focal main
   deb-src http://ppa.launchpad.net/yannick-mauray/quickgui/ubuntu focal main
   EOF
   sudo apt-get update
   sudo apt-get install qemu-system -t bullseye-backports
   sudo apt-get install quickemu quickgui
   

3. Test both QuickGet and QuickEmu

   mkdir ~/VMs
   cd ~/VMs
   quickget debian 12.5.0 netinst
   quickemu --vm debian-12.5.0-netinst.conf
   

4. Try to run QuickGUI with quickemu

Expected results:

• QuickGUI is started and operational

Actual results:

• QuickGUI shows empty window

  

  and the following output in the terminal:

  $ quickgui 
   ** (quickgui:102715): CRITICAL **: 13:29:19.309: Failed to read XDG desktop portal settings: GDBus.Error:org.freedesktop.portal.Error.NotFound: Requested setting not found
  

Additional info:

$ cat /etc/debian_version 
11.9

$ apt-cache policy quickemu quickgui 
quickemu:
  Installed: 4.9.1-1~focal23344.2321
  Candidate: 4.9.1-1~focal23344.2321
  Version table:
 *** 4.9.1-1~focal23344.2321 500
        500 http://ppa.launchpad.net/flexiondotorg/quickemu/ubuntu focal/main amd64 Packages
        500 http://ppa.launchpad.net/flexiondotorg/quickemu/ubuntu focal/main i386 Packages
        100 /var/lib/dpkg/status
quickgui:
  Installed: 1.2.8-1~focal1.0
  Candidate: 1.2.8-1~focal1.0
  Version table:
 *** 1.2.8-1~focal1.0 500
        500 http://ppa.launchpad.net/yannick-mauray/quickgui/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

$ dpkg -l | grep ^ii | egrep "quickemu|quickgui|desktop-portal"
ii  quickemu                                      4.9.1-1~focal23344.2321                    all          Quickemu creates and runs optimised virtual machines.
ii  quickgui                                      1.2.8-1~focal1.0                           amd64        A Flutter frontend for quickget
ii  xdg-desktop-portal                            1.16.0-2~bpo11+1                           amd64        desktop integration portal for Flatpak and Snap
ii  xdg-desktop-portal-dev                        1.8.1-1                                    all          desktop integration portal - development files
ii  xdg-desktop-portal-gtk                        1.14.1-1~bpo11+1                           amd64        GTK+/GNOME portal backend for xdg-desktop-portal