http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c1 --- Comment #1 from Marcel Kuehlhorn --- Due to libqt5-qtstyleplugins-platformtheme-gtk2 being hard required by Cinnamon GTK integration will be disabled again on the main package, a branch with it enabled will be kept for further testing at https://build.opensuse.org/project/show/home:tux93:tdesktop -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c3 --- Comment #3 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 ;) ) -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c5 --- Comment #5 from Marcel Kuehlhorn --- Created attachment 818688 --> http://bugzilla.opensuse.org/attachment.cgi?id=818688&action=edit log of successful launch -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c7 --- Comment #7 from Marcel Kuehlhorn --- It seems the -debug flag has no effect :(

[2019.09.18 10:52:38] Launched version: 1008008, install beta: [FALSE], alpha: 0, debug mode: [FALSE], test dc: [FALSE] [...] [2019.09.18 10:52:38] Command line: telegram-desktop -debug

I attached the log for a successful start with uninstalled libqt5-qtstyleplugins-platformtheme-gtk2 and a failed one anyway. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c9 --- Comment #9 from Xu Zhao --- (In reply to Marcel Kuehlhorn from comment #8)

Created attachment 818690 [details] cursive chat titles

I also noticed that in your patched version the titles in the chatlist become cursive, is that intentional?

The patches remove the built-in Open Sans fonts and uses system built-in Open Sans fonts. So it may pick-up an alternate if some fonts are missing in your system. Check "Font Error" in your log.txt file for more details. Sorry I am still searching for flags to enable debug logs in Telegram. Enabling debug messages will be very helpful to further diagnose the qtstyle plugin conflict. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c11 --- Comment #11 from Xu Zhao --- (In reply to Marcel Kuehlhorn from comment #8)

Created attachment 818690 [details] cursive chat titles

I also noticed that in your patched version the titles in the chatlist become cursive, is that intentional?

Tonight I debugged it on a xfce virtual machine. Some updates: 1. The libqt5-qtstyleplugins-platformtheme-gtk2 package has two so files: platformthemes/libqgtk2.so and plugins/styles/libqgtk2style.so. The problematic one is libqgtk2.so. 2. Qt plugin loader searches the folder /usr/lib64/qt5/plugins/platformthemes and finds two plugins: libqgtk2.so and libqgtk3.so. It incorrectly selects the libqgtk2.so even if it is a gtk3 environment (xfce/gnome in my case). If only gtk2 plugin exists, it has no problem. So it is really a Qt bug. Up to now it is not clear why Qt prefer the gtk2 plugin over the gtk3 one, and whether a workaround exists. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c13 Marcel Kuehlhorn changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|tux93@opensuse.org |dmueller@suse.com --- Comment #13 from Marcel Kuehlhorn --- (In reply to Xu Zhao from comment #12)

I have already found the root cause. In https://build.opensuse.org/package/view_file/KDE:Qt:5.13/libqt5-qtbase/ libqt5-prioritise-gtk2-platformtheme.patch?expand=1 , openSUSE is prioritizing gtk2 theme over gtk3. This is incorrect. Given the time now gtk2 is mostly deprecated by both XFCE and Cinnamon, we should at least place gtk2 theme after gtk3.

Adding Dirk Mueller since he's bugowner of KDE:Qt to see if that would be possible. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c15 --- Comment #15 from Marcel Kuehlhorn --- It seems we're still at a stalemate between working GTK <-> Qt themeing and working GTK integration in Telegram: completely removing the patch from libqt5-qtbase predictably brought back bug 1002900, replacing it with a patch that adds GTK2 second also results in QT apps on GTK falling back to the GNOME default theme... https://build.opensuse.org/package/show/home:tux93:branches:KDE:Qt:5.13/libq... -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c17 --- Comment #17 from Xu Zhao --- (In reply to Marcel Kuehlhorn from comment #15)

It seems we're still at a stalemate between working GTK <-> Qt themeing and working GTK integration in Telegram: completely removing the patch from libqt5-qtbase predictably brought back bug 1002900, replacing it with a patch that adds GTK2 second also results in QT apps on GTK falling back to the GNOME default theme...

https://build.opensuse.org/package/show/home:tux93:branches:KDE:Qt:5.13/ libqt5-qtbase

Also, what do you mean by "QT apps on GTK falling back to the GNOME default theme"? My understanding of setting GTK3 as the first will result in QT apps on GTK3 falling back to GTK3 theme, which is correct behavior. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c19 --- Comment #19 from Marcel Kuehlhorn --- Created attachment 819630 --> http://bugzilla.opensuse.org/attachment.cgi?id=819630&action=edit Fallback theme

A quick question: which Cinnamon package hard depends on libqt5-qtstyleplugins-platformtheme-gtk2?

~> zypper se --requires libqt5-qtstyleplugins-platformtheme-gtk2 S | Name | Summary | Type --+-----------------------------+----------------------------------------------+-------- | cinnamon-session | The session manager for the Cinnamon Desktop | package | libqt5-qtstyleplugins-devel | Qt 5 Style Plugins Development Files | package | mate-session-manager | MATE Session Manager | package

Also, what do you mean by "QT apps on GTK falling back to the GNOME default theme"? My understanding of setting GTK3 as the first will result in QT apps on GTK3 falling back to GTK3 theme, which is correct behavior.

If you look at this Screenshot, you notice that Keepass falls back to the default theme instead of using the GTK3 version of the set theme -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c21 --- Comment #21 from Xu Zhao --- After some research, I have finally fixed this problem completely. This is because when the application starts up (step-1), it uses gtk2 theme prior to the gtk3 theme (specified by qt5-base). However, when later Telegram initializes the gtk environment (step-2), it searches for the gtk3 library first, if found, use the gtk3 library. If not found, use the gtk2 library. When both gtk2 and gtk3 libraries co-exist in the system, the application will first use gtk2 theme to start up (in step-1), then use gtk3 libraries to initialize (in step-2), mix using two libraries causes a failed start. To fix this, I have created a patch to let Telegram always favor gtk2 over gtk3 during initialization, since openSUSE has chosen to enable gtk2 theme by default in qt5-base. Please help test my patch at: https://build.opensuse.org/package/show/home:nuklly:branches:server:messagin... on XFCE, Cinnamon, GNOME, etc. The version works on KDE. Note that I have to add the libappindicator1 as a hard dependency because Telegram can only use gtk2 with libappindicator1 for notification. (In reply to Marcel Kuehlhorn from comment #19)

Created attachment 819630 [details] Fallback theme

...

A quick question: which Cinnamon package hard depends on libqt5-qtstyleplugins-platformtheme-gtk2?

...

~> zypper se --requires libqt5-qtstyleplugins-platformtheme-gtk2 S | Name | Summary | Type --+-----------------------------+----------------------------------------------+-------- | cinnamon-session | The session manager for the Cinnamon Desktop | package | libqt5-qtstyleplugins-devel | Qt 5 Style Plugins Development Files | package | mate-session-manager | MATE Session Manager | package

...

Also, what do you mean by "QT apps on GTK falling back to the GNOME default theme"? My understanding of setting GTK3 as the first will result in QT apps on GTK3 falling back to GTK3 theme, which is correct behavior.

If you look at this Screenshot, you notice that Keepass falls back to the default theme instead of using the GTK3 version of the set theme

-- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c23 --- Comment #23 from Nathaniel Graham --- Sweet, can we get this done for the official packaging? -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c25 Xu Zhao changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #25 from Xu Zhao --- Resolved by req#746365. Waiting for the Factory's adoption. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c28 Marcel Kuehlhorn changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |fabian@ritter-vogt.de Flags| |needinfo?(fabian@ritter-vog | |t.de) --- Comment #28 from Marcel Kuehlhorn --- (In reply to Xu Zhao from comment #27)

Just curious, why does openSUSE still have the gtk2 priortise patch in libqt5-qtbase? It doesn't make any sense to me to still favor gtk2 theme over gtk3 on Qt applications. Removing this patch will solve this problem automatically, based on my understanding of this bug.

Good question, maybe one of the maintainers could answer that? -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c30 --- Comment #30 from Xu Zhao --- (In reply to Fabian Vogt from comment #29)

(In reply to Marcel Kuehlhorn from comment #28)

...

(In reply to Xu Zhao from comment #27)

...

Just curious, why does openSUSE still have the gtk2 priortise patch in libqt5-qtbase? It doesn't make any sense to me to still favor gtk2 theme over gtk3 on Qt applications. Removing this patch will solve this problem automatically, based on my understanding of this bug.

Good question, maybe one of the maintainers could answer that?

The gtk3 plugin is only a platform plugin, but not a theme or style, so it would use Fusion (or some other theme) with GTK 3 dialogs. The gtk2 style plugin is a complete style, theme and platform plugin.

I see. Sorry I am not familiar with this part of Qt. Could you please provide more details? Why prioritzing gtk3 platform plugin and using other gtk3 theme over gtk2 style plugin(w/ theme and style) is a problem? -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c38 --- Comment #38 from OBSbugzilla Bot --- This is an autogenerated message for OBS integration: This bug (1149986) was mentioned in https://build.opensuse.org/request/show/897722 Factory / telegram-desktop -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=1149986 http://bugzilla.opensuse.org/show_bug.cgi?id=1149986#c41 --- Comment #41 from OBSbugzilla Bot --- This is an autogenerated message for OBS integration: This bug (1149986) was mentioned in https://build.opensuse.org/request/show/988087 Backports:SLE-15-SP4 / telegram-desktop -- You are receiving this mail because: You are on the CC list for the bug.