Comment # 3 on bug 1149986 from Marcel Kuehlhorn

Thanks for your efforts, unfortunately the problem persists for me on Xfce:
> ~> telegram-desktop 
> (telegram-desktop:5440): GLib-GObject-WARNING **: 16:10:00.852: cannot register existing type 'GdkDisplayManager'
> (telegram-desktop:5440): GLib-CRITICAL **: 16:10:00.852: g_once_init_leave: assertion 'result != 0' failed
> (telegram-desktop:5440): GLib-GObject-CRITICAL **: 16:10:00.852: g_object_new_with_properties: assertion 'G_TYPE_IS_OBJECT (object_type)' failed

> ~> zypper se -si telegram qtstyle
> S  | Name                                     | Type    | Version                | Arch   | Repository  
---+------------------------------------------+---------+------------------------+--------+-------------
> i+ | libqt5-qtstyleplugins-platformtheme-gtk2 | package | 5.0.0+git20170311-6.12 | x86_64 | openSUSE-Oss
> i+ | telegram-desktop                         | package | 1.8.8-62.1             | x86_64 | Local 

Please send your patches to server:messaging anyway, just leave GTK integration
disabled
(and don't forget to add a changelog entry for the patches ;) )